83 results on '"Koekemoer A.M."'
Number of results to display per page
Search Results
2. The COSMOS-Web ring: In-depth characterization of an Einstein ring lensing system at z ~ 2
- Author
-
Mercier, W., primary, Shuntov, M., additional, Gavazzi, R., additional, Nightingale, J.W., additional, Arango, R., additional, Ilbert, O., additional, Amvrosiadis, A., additional, Ciesla, L., additional, Casey, C.M., additional, Jin, S., additional, Faisst, A.L., additional, Andika, I.T., additional, Drakos, N.E., additional, Enia, A., additional, Franco, M., additional, Gillman, S., additional, Gozaliasl, G., additional, Hayward, C.C., additional, Huertas-Company, M., additional, Kartaltepe, J.S., additional, Koekemoer, A.M., additional, Laigle, C., additional, Le Borgne, D., additional, Magdis, G., additional, Mahler, G., additional, Maraston, C., additional, Martin, C.L., additional, Massey, R., additional, McCracken, H.J., additional, Moutard, T., additional, Paquereau, L., additional, Rhodes, J.D., additional, Robertson, B.E., additional, Sanders, D.B., additional, Toft, S., additional, Trebitsch, M., additional, Tresse, L., additional, and Vijayan, A.P., additional
- Published
- 2024
- Full Text
- View/download PDF
3. The cold interstellar medium of a normal sub-L* galaxy at the end of reionization
- Author
-
Valentino, F., primary, Fujimoto, S., additional, Gimenez-Arteaga, C., additional, Brammer, G., additional, Kohno, K., additional, Sun, F., additional, Kokorev, V., additional, Bauer, F.E., additional, Di Cesare, C., additional, Espada, D., additional, Lee, M., additional, Dessauges-Zavadsky, M., additional, Ao, Y., additional, Koekemoer, A.M., additional, Ouchi, M., additional, Wu, J.F., additional, Egami, E., additional, Jolly, J.-B., additional, del Lagos, C.P., additional, Magdis, G.E., additional, Schaerer, D., additional, Shimasaku, K., additional, Umehata, H., additional, and Wang, W.-H., additional
- Published
- 2024
- Full Text
- View/download PDF
4. Galaxy morphology from z~6 through the lens of JWST
- Author
-
Huertas-Company, M., primary, Iyer, K.G., additional, Angeloudi, E., additional, Bagley, M.B., additional, Finkelstein, S.L., additional, Kartaltepe, J., additional, McGrath, E.J., additional, Sarmiento, R., additional, Vega-Ferrero, J., additional, Arrabal Haro, P., additional, Behroozi, P., additional, Buitrago, F., additional, Cheng, Y., additional, Costantin, L., additional, Dekel, A., additional, Dickinson, M., additional, Elbaz, D., additional, Grogin, N.A., additional, Hathi, N.P., additional, Holwerda, B.W., additional, Koekemoer, A.M., additional, Lucas, R.A., additional, Papovich, C., additional, Perez-Gonzalez, P.G., additional, Pirzkal, N., additional, Seille, L-M., additional, de la Vega, A., additional, Wuyts, S., additional, Yang, G., additional, and Yung, L.Y.A., additional
- Published
- 2023
- Full Text
- View/download PDF
5. The All-Wavelength Extended Groth Strip International Survey (AEGIS) Data Sets
- Author
-
Davis, M., Guhathakurta, P., Konidaris, N.P., Newman, J.A., Ashby, M.L.N., Biggs, A.D., Barmby, P., Bundy, K., Chapman, S.C., Coil, A.L., Conselice, C.J., Cooper, M.C., Croton, D.J., Eisenhardt, P.R.M., Ellis, R.S., Faber, S.M., Fang, T., Fazio, G.G., Georgakakis, A., Gerke, B.F., Goss, W.M., Gwyn, S., Harker, J., Hopkins, A.M., Huang, J.-S., Ivison, R.J., Kassin, S.A., Kirby, E.N., Koekemoer, A.M., Koo, D.C., Laird, E.S., Le Floc'h, E., Lin, L., Lotz, J.M., Marshall, P.J., Martin, D.C., Metevier, A.J., Moustakas, L.A., Nandra, K., Noeske, K.G., Papovich, C., Phillips, A.C., Rich, R. M., Rieke, G.H., Rigopoulou, D., Salim, S., Schiminovich, D., Simard, L., Smail, I., Small, T.A., Weiner, B.J., Willmer, C.N.A., Willner, S.P., Wilson, G., Wright, E.L., and Yan, R.
- Subjects
Physics of elementary particles and fields ,Galaxies galaxy surveys infrared photometry - Published
- 2006
6. Probing the High Redshift Universe with Extreme X-Ray/Optical Sources (EXOs)
- Author
-
Koekemoer, A.M., Alexander, D.M., Bauer, F.E., Bergeron, J., Brandt, W.N., Chatzichristou, E., Cristiani, S., Fall, S.M., Grogin, N., Livio, M., Mainieri, V., Moustakas, L., Rosati, P., Schreier, E.J., Urry, C.M., Renzini, Alvio, editor, and Bender, Ralf, editor
- Published
- 2005
- Full Text
- View/download PDF
7. Early Spitzer Detections of Extreme X-ray/Optical Sources (EXOs)
- Author
-
Koekemoer, A.M., Alexander, D.M., Bauer, F.E., Bergeron, J., Brandt, W. N., Cristiani, S., Dickinson, M., Grogin, N.A., Mainieri, V., Moustakas, L., Urry, C. M., Merloni, Andrea, editor, Nayakshin, Sergei, editor, and Sunyaev, Rashid A., editor
- Published
- 2005
- Full Text
- View/download PDF
8. A galaxy rapidly forming stars 700 million years after the Big Bang at redshift 7.51
- Author
-
Finkelstein, S.L., Papovich, C., Dickinson, M., Song, M., Tilvi, V., Koekemoer, A.M., Finkelstein, K.D., Mobasher, B., Ferguson, H.C., Giavalisco, M., Reddy, N., Ashby, M.L.N., Dekel, A., Fazio, G.G., Fontana, A., Grogin, N.A., Huang, J.- S., Kocevski, D., Rafelski, M., Weiner, B.J., and Willner, S.P.
- Subjects
Red shift -- Research ,Cosmic physics -- Research ,Big bang theory -- Research ,Environmental issues ,Science and technology ,Zoology and wildlife conservation - Abstract
Of several dozen galaxies observed spectroscopically that are candidates for having a redshift (z) in excess of seven, only five have had their redshifts confirmed via Lyman a emission, at z = 7.008,7.045, 7.109, 7.213 and 7.215 (refs 1-4). The small fraction of confirmed galaxies may indicate that the neutral fraction in the intergalactic medium rises quickly at z > 6.5, given that Lyman a is resonantly scattered by neutral gas (3,5-8). The small samples and limited depth of previous observations, however, makes these conclusions tentative. Here we report a deep near-infrared spectroscopic survey of 43 photometrically-selected galaxies with z > 6.5. We detect a near-infrared emission line from only a single galaxy, confirming that some process is making Lyman a difficult to detect. The detected emission line at a wavelength of 1.0343 micrometres is likely to be Lyman α emission, placing this galaxy at a redshift z= 7.51, an epoch 700 million years after the Big Bang. This galaxy's colours are consistent with significant metal content, implying that galaxies become enriched rapidly. We calculate a surprisingly high star-formation rate of about 330 solar masses per year, which is more than a factor of 100 greater than that seen in the Milky Way. Such a galaxy is unexpected in a survey of our size (9), suggesting that the early Universe may harbour a larger number of intense sites of star formation than expected., We obtained near-infrared (NIR) spectroscopy of galaxies originally discovered in the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) (10,11) with the newly commissioned NIR spectrograph MOSFIRE (12) on the [...]
- Published
- 2013
- Full Text
- View/download PDF
9. The Nature of UV-Selected Galaxies in the CDFS
- Author
-
de Mello, Duília F., Gardner, Jonathan P., Dahlen, T., Conselice, C.J., Grogin, N.A., Koekemoer, A.M., Renzini, Alvio, editor, and Bender, Ralf, editor
- Published
- 2005
- Full Text
- View/download PDF
10. Did galaxy assembly and supermassive black-hole growth go hand-in-hand?
- Author
-
Windhorst, R.A., Cohen, S.H., Straughn, A.N., Ryan, R.E., Jr., Hathi, N.P., Jansen, R.A., Koekemoer, A.M., Pirzkal, N., Xu, C., Mobasher, B., Malhotra, S., Strolger, L., and Rhoads, J.E.
- Published
- 2006
- Full Text
- View/download PDF
11. Probing the High Redshift Universe with Extreme X-Ray/Optical Sources (EXOs)
- Author
-
Koekemoer, A.M., primary, Alexander, D.M., additional, Bauer, F.E., additional, Bergeron, J., additional, Brandt, W.N., additional, Chatzichristou, E., additional, Cristiani, S., additional, Fall, S.M., additional, Grogin, N., additional, Livio, M., additional, Mainieri, V., additional, Moustakas, L., additional, Rosati, P., additional, Schreier, E.J., additional, and Urry, C.M., additional
- Published
- 2006
- Full Text
- View/download PDF
12. Early Spitzer Detections of Extreme X-ray/Optical Sources (EXOs)
- Author
-
Koekemoer, A.M., primary, Alexander, D.M., additional, Bauer, F.E., additional, Bergeron, J., additional, Brandt, W. N., additional, Cristiani, S., additional, Dickinson, M., additional, Grogin, N.A., additional, Mainieri, V., additional, Moustakas, L., additional, and Urry, C. M., additional
- Published
- 2005
- Full Text
- View/download PDF
13. The VANDELS ESO public spectroscopic survey
- Author
-
McLure, R.J., Pentericci, L., Cimatti, A., Dunlop, J.S., Elbaz, D., Fontana, A., Nandra, K., Amorin, R., Bolzonella, M., Bongiorno, A., Carnall, A.C., Castellano, M., Cirasuolo, M., Cucciati, O., Cullen, F., De Barros, S., Finkelstein, S.L., Fontanot, F., Franzetti, P., Fumana, M., Gargiulo, A., Garilli, B., Guaita, L., Hartley, W.G., Iovino, A., Jarvis, M.J., Juneau, S., Karman, W., Maccagni, D., Marchi, F., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, Omar, Balestra, I., Bardelli, S., Bell, E.F., Bourne, N., Bowler, R.A.A., Brusa, M., Buitrago, F., Caputi, K.I., Cassata, P., Charlot, S., Citro, A., Cresci, G., Cristiani, S., Curtis-Lake, E., Dickinson, M., Fazio, G.G., Ferguson, H.C., Fiore, F., Franco, M., Fynbo, J P U, Galametz, A., Georgakakis, A., Giavalisco, M., Grazian, A., Hathi, N.P., Jung, I., Kim, S., Koekemoer, A.M., Khusanova, Y., Lotz, J.M., Mannucci, F., Maltby, David T., Matsuoka, K., McLeod, D.J., Mendez-Hernandez, H., Mendez-Abreu, J., Mignoli, M., Moresco, M., Mortlock, A., Nonino, M., Pannella, M., Papovich, C., Popesso, P., Rosario, D.P., Salvato, M., Santini, P., Schaerer, D., Schreiber, C., Stark, D.P., Tasca, L.A.M., Thomas, R., Treu, T., Vanzella, E., Wild, V., Williams, C.C., Zamorani, G., and Zucca, E.
- Subjects
surveys ,galaxies: high-redshift ,galaxies: star formation ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,galaxies: evolution ,Astrophysics::Galaxy Astrophysics - Abstract
VANDELS is a uniquely deep spectroscopic survey of high-redshift galaxies with the VIMOS spectrograph on ESO’s Very Large Telescope (VLT). The survey has obtained ultradeep optical (0.48 < λ < 1.0 μm) spectroscopy of ≃2100 galaxies within the redshift interval 1.0 ≤ z ≤ 7.0, over a total area of ≃0.2 deg2 centred on the CANDELS Ultra Deep Survey and Chandra Deep Field South fields. Based on accurate photometric redshift pre-selection, 85 per cent of the galaxies targeted by VANDELS were selected to be at z ≥ 3. Exploiting the red sensitivity of the refurbished VIMOS spectrograph, the fundamental aim of the survey is to provide the high-signal-to-noise ratio spectra necessary to measure key physical properties such as stellar population ages, masses, metallicities, and outflow velocities from detailed absorption-line studies. Using integration times calculated to produce an approximately constant signal-to-noise ratio (20 < tint< 80 h), the VANDELS survey targeted: (a) bright star-forming galaxies at 2.4 ≤ z ≤ 5.5, (b) massive quiescent galaxies at 1.0 ≤ z ≤ 2.5, (c) fainter star-forming galaxies at 3.0 ≤ z ≤ 7.0, and (d) X-ray/Spitzer-selected active galactic nuclei and Herschel-detected galaxies. By targeting two extragalactic survey fields with superb multiwavelength imaging data, VANDELS will produce a unique legacy data set for exploring the physics underpinning high-redshift galaxy evolution. In this paper, we provide an overview of the VANDELS survey designed to support the science exploitation of the first ESO public data release, focusing on the scientific motivation, survey design, and target selection.
- Published
- 2018
14. First Data Release of the COSMOS Lyα Mapping and Tomography Observations: 3D Lyα Forest Tomography at 2.05 < z < 2.55
- Author
-
Lee, K.G., Krolewski, A., White, M., Schlegel, D., Nugent, P.E., Hennawi, J.F., Müller, T., Pan, R., Prochaska, J.X., Font-Ribera, A., Suzuki, N., Glazebrook, K., Kacprzak, G.G., Kartaltepe, J.S., Koekemoer, A.M., Fèvre, O. le, Lemaux, B.C., Maier, C., Nanayakkara, W.T.T., Rich, R.M., Sanders, D.B., Salvato, M., Tasca, L., and Tran, K.V.H.
- Published
- 2018
15. Mass assembly and morphological transformations since z? 3 from CANDELS
- Author
-
Huertas-Company, M., Bernardi, M., Ashby, M.L.N., Barro, G., Conselice, Christopher J., Daddi, E., Dekel, A., Dimauro, P., Faber, S.M., Grogin, N.A., Kartaltepe, J.S., Kocevski, D.D., Koekemoer, A.M., Koo, D.C., Mei, S., and Shankar, F.
- Subjects
galaxies: abundances, galaxies: evolution, galaxies: high-redshift, galaxies: structure ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Earth and Planetary Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics::Galaxy Astrophysics - Abstract
We quantify the evolution of the stellar mass functions (SMFs) of star-forming and quiescent galaxies as a function of morphology from z ? 3 to the present. Our sample consists of ?50 000 galaxies in the CANDELS fields (?880 arcmin2), which we divide into four main morphological types, i.e. pure bulge-dominated systems, pure spiral disc-dominated, intermediate two-component bulge+disc systems and irregular disturbed galaxies. At z ? 2, 80 per cent of the stellarmass density of star-forming galaxies is in irregular systems. However, by z ? 0.5, irregular objects only dominate at stellar masses below 109M_. A majority of the star-forming irregulars present at z ? 2 undergo a gradual transformation from disturbed to normal spiral disc morphologies by z ? 1 without significant interruption to their star formation. Rejuvenation after a quenching event does not seem to be common except perhaps for the most massive objects, because the fraction of bulge-dominated star-forming galaxies with M?/M_ > 1010.7 reaches 40 per cent at z < 1. Quenching implies the presence of a bulge: the abundance of massive red discs is negligible at all redshifts over 2 dex in stellar mass. However, the dominant quenching mechanism evolves. At z > 2, the SMF of quiescent galaxies aboveM ? is dominated by compact spheroids. Quenching at this early epoch destroys the disc and produces a compact remnant unless the star-forming progenitors at even higher redshifts are significantly more dense. At 1 < z
- Published
- 2016
16. Hubble Tarantula Treasury Project. III. Photometric Catalog and Resulting Constraints on the Progression of Star Formation in the 30 Doradus Region
- Author
-
Sabbi, E., Lennon, D.J., Anderson, J., Cignoni, M., Marel, R.P. van der, Zaritsky, D., Marchi, G. de, Panagia, N., Gouliermis, D.A., Grebel, E.K., Gallagher, J.S., Smith, L.J., Sana, H., Aloisi, A., Tosi, M., Evans, C.J., Arab, H., Boyer, M., Mink, S.E. de, Gordon, K., Koekemoer, A.M., Larsen, S.S., Ryon, J.E., Zeidler, P., Sabbi, E., Lennon, D.J., Anderson, J., Cignoni, M., Marel, R.P. van der, Zaritsky, D., Marchi, G. de, Panagia, N., Gouliermis, D.A., Grebel, E.K., Gallagher, J.S., Smith, L.J., Sana, H., Aloisi, A., Tosi, M., Evans, C.J., Arab, H., Boyer, M., Mink, S.E. de, Gordon, K., Koekemoer, A.M., Larsen, S.S., Ryon, J.E., and Zeidler, P.
- Abstract
Contains fulltext : 155817.pdf (publisher's version ) (Open Access)
- Published
- 2016
17. Hubble Tarantula Treasury Project: Unraveling Tarantula's Web. I. Observational Overview and First Results
- Author
-
Sabbi, S., Anderson, I., Lennon, D.J., Marel, R.P. van der, Aloisi, A., Boyer, M.L., Cignoni, M., Marchi, G. de, Mink, S.E. de, Evans, C.J., Gallagher, J.S., Gordon, K., Gouliermis, D.A., Grebel, E.K., Koekemoer, A.M., Larsen, S.S., Panagia, N., Ryon, J.E., Smith, L.J., Tosi, M., Zaritsky, D., Sabbi, S., Anderson, I., Lennon, D.J., Marel, R.P. van der, Aloisi, A., Boyer, M.L., Cignoni, M., Marchi, G. de, Mink, S.E. de, Evans, C.J., Gallagher, J.S., Gordon, K., Gouliermis, D.A., Grebel, E.K., Koekemoer, A.M., Larsen, S.S., Panagia, N., Ryon, J.E., Smith, L.J., Tosi, M., and Zaritsky, D.
- Abstract
Contains fulltext : 117036.pdf (preprint version ) (Open Access)
- Published
- 2013
18. EMU: Evolutionary map of the universe
- Author
-
Norris, R.P., Hopkins, A.M., Afonso, J., Brown, S., Condon, J.J., Dunne, L., Feain, I., Hollow, R., Jarvis, M., Johnston-Hollitt, M., Lenc, E., Middelberg, E., Padovani, P., Prandoni, I., Rudnick, L., Seymour, N., Umana, G., Andernach, H., Alexander, D.M., Appleton, P.N., Bacon, D., Banfield, J., Becker, W., Brown, M.J.I., Ciliegi, P., Jackson, C., Eales, S., Edge, A.C., Gaensler, B.M., Giovannini, G., Hales, C.A., Hancock, P., Huynh, M.T., Ibar, E., Ivison, R.J., Kennicutt, R., Kimball, A.E., Koekemoer, A.M., Koribalski, B.S., Lpez-Snchez, R., Mao, M.Y., Murphy, T., Messias, H., Pimbblet, K.A., Raccanelli, A., Randall, K.E., Reiprich, T.H., Roseboom, I.G., Rttgering, H., Saikia, D.J., Sharp, R.G., Slee, O.B., Smail, I., Thompson, M.A., Urquhart, J.S., Wall, J.V., Zhao, G.-B., Norris, R.P., Hopkins, A.M., Afonso, J., Brown, S., Condon, J.J., Dunne, L., Feain, I., Hollow, R., Jarvis, M., Johnston-Hollitt, M., Lenc, E., Middelberg, E., Padovani, P., Prandoni, I., Rudnick, L., Seymour, N., Umana, G., Andernach, H., Alexander, D.M., Appleton, P.N., Bacon, D., Banfield, J., Becker, W., Brown, M.J.I., Ciliegi, P., Jackson, C., Eales, S., Edge, A.C., Gaensler, B.M., Giovannini, G., Hales, C.A., Hancock, P., Huynh, M.T., Ibar, E., Ivison, R.J., Kennicutt, R., Kimball, A.E., Koekemoer, A.M., Koribalski, B.S., Lpez-Snchez, R., Mao, M.Y., Murphy, T., Messias, H., Pimbblet, K.A., Raccanelli, A., Randall, K.E., Reiprich, T.H., Roseboom, I.G., Rttgering, H., Saikia, D.J., Sharp, R.G., Slee, O.B., Smail, I., Thompson, M.A., Urquhart, J.S., Wall, J.V., and Zhao, G.-B.
- Abstract
EMU is a wide-field radio continuum survey planned for the new Australian Square Kilometre Array Pathfinder (ASKAP) telescope. The primary goal of EMU is to make a deep (rms ? 10 ?Jy/beam) radio continuum survey of the entire Southern sky at 1.3 GHz, extending as far North as +30° declination, with a resolution of 10 arcsec. EMU is expected to detect and catalogue about 70 million galaxies, including typical star-forming galaxies up to z ? 1, powerful starbursts to even greater redshifts, and active galactic nuclei to the edge of the visible Universe. It will undoubtedly discover new classes of object. This paper defines the science goals and parameters of the survey, and describes the development of techniques necessary to maximise the science return from EMU.
- Published
- 2011
19. Improved constraints on the expansion rate of the Universe up toz∼ 1.1 from the spectroscopic evolution of cosmic chronometers
- Author
-
Moresco, M, primary, Cimatti, A, additional, Jimenez, R, additional, Pozzetti, L, additional, Zamorani, G, additional, Bolzonella, M, additional, Dunlop, J, additional, Lamareille, F, additional, Mignoli, M, additional, Pearce, H, additional, Rosati, P, additional, Stern, D, additional, Verde, L, additional, Zucca, E, additional, Carollo, C.M, additional, Contini, T, additional, Kneib, J.-P, additional, Fèvre, O. Le, additional, Lilly, S.J, additional, Mainieri, V, additional, Renzini, A, additional, Scodeggio, M, additional, Balestra, I, additional, Gobat, R, additional, McLure, R, additional, Bardelli, S, additional, Bongiorno, A, additional, Caputi, K, additional, Cucciati, O, additional, Torre, S. de la, additional, Ravel, L. de, additional, Franzetti, P, additional, Garilli, B, additional, Iovino, A, additional, Kampczyk, P, additional, Knobel, C, additional, Kovač, K, additional, Borgne, J.-F. Le, additional, Brun, V. Le, additional, Maier, C, additional, Pelló, R, additional, Peng, Y, additional, Perez-Montero, E, additional, Presotto, V, additional, Silverman, J.D, additional, Tanaka, M, additional, Tasca, L.A.M, additional, Tresse, L, additional, Vergani, D, additional, Almaini, O, additional, Barnes, L, additional, Bordoloi, R, additional, Bradshaw, E, additional, Cappi, A, additional, Chuter, R, additional, Cirasuolo, M, additional, Coppa, G, additional, Diener, C, additional, Foucaud, S, additional, Hartley, W, additional, Kamionkowski, M, additional, Koekemoer, A.M, additional, López-Sanjuan, C, additional, McCracken, H.J, additional, Nair, P, additional, Oesch, P, additional, Stanford, A, additional, and Welikala, N, additional
- Published
- 2012
- Full Text
- View/download PDF
20. Early Spitzer Detections of Extreme X-ray/Optical Sources (EXOs).
- Author
-
Merloni, Andrea, Nayakshin, Sergei, Sunyaev, Rashid A., Koekemoer, A.M., Alexander, D.M., Bauer, F.E., Bergeron, J., Brandt, W. N., Cristiani, S., Dickinson, M., Grogin, N.A., Mainieri, V., Moustakas, L., and Urry, C. M.
- Abstract
The first Spitzer images from the GOODS survey have revealed detections of all the Extreme X-ray / Optical sources (‘EXO's) in the CDF-South. These X-ray sources are completely undetected in our deep optical GOODS HST/ACS imaging, to limits that place them at the extreme end of the Fx/Fopt parameter space, with values about 100 to 1000 times higher than generally found for Active Galactic Nuclei (AGN). We use their Spitzer detections to investigate two possible scenarios for their nature: (1) their hosts could be extremely faint, obscured high-redshift Extremely Red Objects (EROs), at redshifts about 2 - 5, thus higher redshift than previously studied EROs; (2) some of them could lie at redshifts above about 6 - 7, such that their Lyman-alpha emission is completely redshifted into the IR. In either case, these objects serve as a valuable probe of black hole growth and accretion activity in the early universe. [ABSTRACT FROM AUTHOR]
- Published
- 2005
- Full Text
- View/download PDF
21. The size-luminosity relation at z = 7 in CANDELS and its implication on reionization.
- Author
-
Grazian, A., Castellano, M., Fontana, A., Pentericci, L., Dunlop, J. S., McLure, R. J., Koekemoer, A.M., Dickinson, M. E., Faber, S. M., Ferguson, H. C., Galametz, A., Giavalisco, M., Grogin, N. A., Hathi, N. P., Kocevski, D. D., Lai, K., Newman, J. A., and Vanzella, E.
- Subjects
STELLAR luminosity function ,IONIZATION (Atomic physics) ,REDSHIFT ,ASTRONOMY ,ASTROPHYSICS - Abstract
Context. The exploration of the relation between galaxy sizes and other physical parameters (luminosity, mass, star formation rate) has provided important clues for understanding galaxy formation, but such exploration has until recently been limited to intermediate redshift objects. Aims. We use the currently available CANDELS Deep+Wide surveys in the GOODS-South, UDS and EGS fields, complemented by data from the HUDF09 program, to address the relation between size and luminosity at z ∼ 7. Methods. The six different fields used for this study are characterized by a wide combination of depth and areal coverage, well suited for reducing the biases on the observed size-magnitude plane. From these fields, we select 153 z-band dropout galaxies. Detailed simulations have been carried out for each of these six fields, inserting simulated galaxies at different magnitudes and half light radius in the two dimensional images for all the Hubble Space Telescope (HST) bands available and recovering them as carried out for the real galaxies. These simulations allow us to derive precisely the completeness as a function of size and magnitude and to quantify measurements errors/biases, under the assumption that the 2D profile of z = 7 galaxies is well represented by an exponential disk function. Results. We find in a rather robust way that the half light radius distribution function of z ∼ 7 galaxies fainter than J = 26.6 is peaked at ⩽0.1 arcsec (or equivalently 0.5 kpc proper), while at brighter magnitudes high-z galaxies are typically larger than ∼0.15 arcsec.We also find a well defined size-luminosity relation, Rh ∝ L1/2. We compute the luminosity function (LF) in the HUDF and P12HUDF fields, finding large spatial variation on the number density of faint galaxies. Adopting the size distribution and the size-luminosity relation found for faint galaxies at z = 7, we derive a mean slope of -1.7 ± 0.1 for the LF of LBGs at this redshift. Conclusions. Using this LF, we find that the number of ionizing photons emitted from galaxies at z ∼ 7 cannot keep the Universe re-ionized if the IGM is clumpy (CHII ⩾ 3) and the Lyman continuum escape fraction of high-z LBGs is relatively low ( fesc ⩽ 0.3). If these results are confirmed and strengthened by future CANDELS data, in particular by the forthcoming deep observations in GOODS-South and North and the wide field COSMOS, we can put severe limits to the role of galaxies in the reionization of the Universe [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
22. Faint high-redshift AGN in the Chandra deep field south: the evolution of the AGN luminosity function and black hole demography.
- Author
-
Fiore, F., Puccetti, S., Grazian, A., Menci, N., Shankar, F., Santini, P., Piconcelli, E., Koekemoer, A.M., Fontana, A., Boutsia, K., Castellano, M., Lamastra, A., Malacaria, C., Feruglio, C., Mathur, S., Miller, N., and Pannella, M.
- Subjects
X-ray astronomy ,GALACTIC nuclei ,STELLAR luminosity function ,REDSHIFT ,BLACK holes ,STAR formation ,ASTRONOMICAL observations - Abstract
Context. We present detection and analysis of faint X-ray sources in the Chandra deep field south (CDFS) using the 4 Ms Chandra observation. Aims. We place constraints on active galactic nuclei (AGN) luminosity functions at z = 3-7, its cosmological evolution, and highredshift black hole and AGN demography. Methods. We use a new detection algorithm, using the entire three-dimensional data-cube (position and energy), and searching for X-ray counts at the position of high-z galaxies in the GOODS-South survey. Results. This optimized technique results in the identification of 54 AGN at z > 3, 29 of which are new detections. Applying stringent completeness criteria, we derive AGN luminosity functions in the redshift bins 3-4, 4-5, and >5.8 and for 42.75 < log L(2-10 keV) <44.5.We combine this data with the luminous AGN luminosity functions from optical surveys and find that the evolution of the high-z, wide luminosity range luminosity function can be modeled by pure luminosity evolution with L• decreasing from 6.6 × 10
44 erg/s at z = 3 to L• = 2 × 1044 erg/s at z = 6. We compare the high-z luminosity function with the predictions of theoretical models using galaxy interactions as AGN triggering mechanism. We find that these models are broadly able to reproduce the high-z AGN luminosity functions. Closer agreement is found when we assume a minimum dark matter halo mass for black hole formation and growth. We compare our AGN luminosity functions with galaxy mass functions to derive the high-z AGN duty cycle, using observed Eddington ratio distributions to derive black hole masses. We find that the duty cycle increases with galaxy stellar mass and redshift by a factor of 10-30 from z = 0.25 to z = 4-5. We also report the detection of a large fraction of highly obscured, Compton thick AGN at z > 3 (18+17 -10%). Their optical counterparts do not show any reddening and we thus conclude that the size of the X-ray absorber is likely smaller than the dust sublimation radius. We finally report the discovery of a highly star-forming galaxy at z = 3.47, arguing that its X-ray luminosity is likely dominated by stellar sources. If confirmed, this would be one of the farthest objects in which stellar sources have been detected in X-rays. [ABSTRACT FROM AUTHOR]- Published
- 2012
- Full Text
- View/download PDF
23. Evidence for merger-driven growth in luminous, high-z, obscured AGNs in the CANDELS/COSMOS field
- Author
-
Donley, J. L., Kartaltepe, J., Kocevski, D., Salvato, M., Santini, P., Suh, H., Civano, F., Koekemoer, A.M., Trump, J., Brusa, M., Cardamone, C., Castro, A., Cisternas, M., Conselice, C., Croton, D., Hathi, N., Liu, C., Lucas, R.A., Nair, P., Rosario, D., Sanders, D., Simmons, B., Villforth, C., Alexander, D.M., Bell, E.F., Faber, S.M., Grogin, N.A., Lotz, J., McIntosh, D.H., Nagao, T., Donley, J. L., Kartaltepe, J., Kocevski, D., Salvato, M., Santini, P., Suh, H., Civano, F., Koekemoer, A.M., Trump, J., Brusa, M., Cardamone, C., Castro, A., Cisternas, M., Conselice, C., Croton, D., Hathi, N., Liu, C., Lucas, R.A., Nair, P., Rosario, D., Sanders, D., Simmons, B., Villforth, C., Alexander, D.M., Bell, E.F., Faber, S.M., Grogin, N.A., Lotz, J., McIntosh, D.H., and Nagao, T.
- Abstract
While major mergers have long been proposed as a driver of both active galactic nucleus (AGN) activity and the MBH–sbulge relation, studies of moderate to high-redshift Seyfert-luminosity AGN hosts have found little evidence for enhanced rates of interactions. However, both theory and observation suggest that while these AGNs may be fueled by stochastic accretion and secular processes, high-luminosity, high-redshift, and heavily obscured AGNs are the AGNs most likely to be merger-driven. To better sample this population of AGNs, we turn to infrared selection in the CANDELS/COSMOS field. Compared to their lower-luminosity and less obscured X-ray-only counterparts, IR-only AGNs (luminous, heavily obscured AGNs) are more likely to be classified as either irregular (50+ or - 12% versus 9 +5 % or -2%) or asymmetric (69 +9% or– 13 % versus 17 +6 % or -4%) and are less likely to have a spheroidal component (31 +13% or -9% versus 77+6% or -4%). Furthermore, IR-only AGNs are also significantly more likely than X-ray-only AGNs (75 +8% or -13% versus 31 + or – 6 %) to be classified either as interacting or merging in a way that significantly disturbs the host galaxy or as disturbed, though not clearly interacting or merging, which potentially represents the late stages of a major merger. This suggests that while major mergers may not contribute significantly to the fueling of Seyfert luminosity AGNs, interactions appear to play a more dominant role in the triggering and fueling of high-luminosity heavily obscured AGNs.
- Full Text
- View/download PDF
24. Mass assembly and morphological transformations since z∼ 3 from CANDELS
- Author
-
Huertas-Company, M., Bernardi, M., Pérez-González, P.G., Ashby, M.L.N., Barro, G., Conselice, Christopher J., Daddi, E., Dekel, A., Dimauro, P., Faber, S.M., Grogin, N.A., Kartaltepe, J.S., Kocevski, D.D., Koekemoer, A.M., Koo, D.C., Mei, S., Shankar, F., Huertas-Company, M., Bernardi, M., Pérez-González, P.G., Ashby, M.L.N., Barro, G., Conselice, Christopher J., Daddi, E., Dekel, A., Dimauro, P., Faber, S.M., Grogin, N.A., Kartaltepe, J.S., Kocevski, D.D., Koekemoer, A.M., Koo, D.C., Mei, S., and Shankar, F.
- Abstract
We quantify the evolution of the stellar mass functions (SMFs) of star-forming and quiescent galaxies as a function of morphology from z ∼ 3 to the present. Our sample consists of ∼50 000 galaxies in the CANDELS fields (∼880 arcmin2), which we divide into four main morphological types, i.e. pure bulge-dominated systems, pure spiral disc-dominated, intermediate two-component bulge+disc systems and irregular disturbed galaxies. At z ∼ 2, 80 per cent of the stellarmass density of star-forming galaxies is in irregular systems. However, by z ∼ 0.5, irregular objects only dominate at stellar masses below 109M_. A majority of the star-forming irregulars present at z ∼ 2 undergo a gradual transformation from disturbed to normal spiral disc morphologies by z ∼ 1 without significant interruption to their star formation. Rejuvenation after a quenching event does not seem to be common except perhaps for the most massive objects, because the fraction of bulge-dominated star-forming galaxies with M∗/M_ > 1010.7 reaches 40 per cent at z < 1. Quenching implies the presence of a bulge: the abundance of massive red discs is negligible at all redshifts over 2 dex in stellar mass. However, the dominant quenching mechanism evolves. At z > 2, the SMF of quiescent galaxies aboveM ∗ is dominated by compact spheroids. Quenching at this early epoch destroys the disc and produces a compact remnant unless the star-forming progenitors at even higher redshifts are significantly more dense. At 1 < z<2, the majority of newly quenched galaxies are discs with a significant central bulge. This suggests that mass quenching at this epoch starts from the inner parts and preserves the disc. At z < 1, the high-mass end of the passive SMF is globally in place and the evolution mostly happens at stellar masses below 1010M_. These low-mass galaxies are compact, bulge-dominated systems, which were environmentally quenched: destruction of the disc through ram-pressure stripping is the likely process.
- Full Text
- View/download PDF
25. The ALPINE−ALMA [C <scp>ii</scp>] Survey: on the nature of an extremely obscured serendipitous galaxy
- Author
-
S. Bardelli, Paolo Cassata, G. C. Jones, Michele Ginolfi, Andreas L. Faisst, L. Morselli, Livia Vallini, Matthieu Béthermin, O. Le Fevre, D. Vergani, Y. Fudamoto, Miroslava Dessauges-Zavadsky, G. Rodighiero, E. Zucca, Edo Ibar, Margherita Talia, John D. Silverman, Dominik Riechers, Brian C. Lemaux, Peter Capak, Daniel Schaerer, Seiji Fujimoto, A. Enia, Médéric Boquien, Lin Yan, Andrea Cimatti, Chiara Mancini, L. Rodríguez-Muñoz, F. Loiacono, G. Zamorani, M. Romano, Nimish P. Hathi, Carlotta Gruppioni, Anton M. Koekemoer, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Romano, M., Cassata, P., Morselli, L., Lemaux, B. C., Bethermin, M. M., Capak, P., Faisst, A., Le Fevre, O., Schaerer, D., Silverman, J., Yan, L., Bardelli, S., Boquien, M., Cimatti, A., Dessauges-Zavadsky, M., Enia, A., Fudamoto, Y., Fujimoto, S., Ginolfi, M., Gruppioni, C., Hathi, N. P., Ibar, E., Jones, G. C., Koekemoer, A. M., Loiacono, F., Mancini, C., Riechers, D. A., Rodighiero, G., Rodriguez-Munoz, L., Talia, M., Vallini, L., Vergani, D., Zamorani, G., Zucca, E., Romano M., Cassata P., Morselli L., Lemaux B.C., Bethermin M.M., Capak P., Faisst A., Le Fevre O., Schaerer D., Silverman J., Yan L., Bardelli S., Boquien M., Cimatti A., Dessauges-Zavadsky M., Enia A., Fudamoto Y., Fujimoto S., Ginolfi M., Gruppioni C., Hathi N.P., Ibar E., Jones G.C., Koekemoer A.M., Loiacono F., Mancini C., Riechers D.A., Rodighiero G., Rodriguez-Munoz L., Talia M., Vallini L., Vergani D., Zamorani G., and Zucca E.
- Subjects
Stellar mass ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,MASS ,01 natural sciences ,Luminosity ,Settore FIS/05 - Astronomia e Astrofisica ,galaxies: high-redshift ,0103 physical sciences ,STAR-FORMING GALAXIES ,PHOTOMETRIC REDSHIFTS ,010303 astronomy & astrophysics ,Reionization ,evolution [galaxies] ,Astrophysics::Galaxy Astrophysics ,COSMOS ,Physics ,galaxies: evolution ,SUBMILLIMETER GALAXIES ,INTERSTELLAR-MEDIUM ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,010308 nuclear & particles physics ,Star formation ,Astronomy and Astrophysics ,DUST CONTENT ,Atacama Large Millimeter Array ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,Redshift ,STELLAR ,[SDU]Sciences of the Universe [physics] ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,Spectral energy distribution ,Astrophysics::Earth and Planetary Astrophysics ,EMISSION ,FAR-INFRARED SPECTROSCOPY ,high-redshift [galaxies] - Abstract
We report the serendipitous discovery of a bright galaxy (Gal-A) observed as part of the ALMA Large Program to INvestigate [CII] at Early times (ALPINE). While this galaxy is detected both in line and continuum emission in ALMA Band 7, it is completely dark in UV/optical filters and only presents a marginal detection in the UltraVISTA Ks band. We discuss the nature of the observed ALMA line, i.e. whether the emission comes from [CII] at z~4.6, or from high-J CO transitions at z~2.2. In the first case we find a [CII]-to-FIR luminosity ratio of log(L_[CII]/L_FIR)=-2.5, consistent with the average value for local star-forming galaxies (SFGs); in the second case, instead, the source would lie outside of the empirical relations between L_CO and L_FIR found in the literature. At both redshifts, we derive the star-formation rate (SFR) from the ALMA continuum, and the stellar mass (M*) by using stellar population synthesis models as input for LePHARE spectral energy distribution (SED) fitting. Exploiting our results, we believe that Gal-A is a Main-Sequence (MS), dusty SFG at z=4.6 (i.e. [CII] emitter) with log(SFR/[M/yr])~1.4 and log(M*/M)~9.7. This work underlines the crucial role of the ALPINE survey in making a census of this class of objects, in order to unveil their contribution to the global star-formation rate density (SFRD) of the Universe at the end of the Reionisation epoch., Comment: 13 pages, 6 figures. Submitted to MNRAS
- Published
- 2020
- Full Text
- View/download PDF
26. The VANDELS ESO public spectroscopic survey
- Author
-
Nimish P. Hathi, Michele Moresco, Jennifer M. Lotz, Seock-Sam Kim, Lidia Tasca, Andrea Grazian, Intae Jung, Adriano Fontana, Casey Papovich, William G. Hartley, Kirpal Nandra, Emanuela Pompei, S. Bardelli, R. Begley, Mauro Giavalisco, Paola Santini, H. C. Ferguson, Andrea Cimatti, J. S. Dunlop, Lucia Guaita, H. Mendez-Hernandez, Christina C. Williams, Giovanni Cresci, A. C. Carnall, A. Saxena, Adriana Gargiulo, Paolo Cassata, A. Iovino, C. Caputi, D. Maccagni, Stephane Charlot, Michele Cirasuolo, Johan P. U. Fynbo, Stefano Cristiani, Fabrizio Fiore, L. Pentericci, Guido Roberts-Borsani, E. Curtis-Lake, M. Longhetti, Manuela Magliocchetti, Matt J. Jarvis, M. Mignoli, Y. Khusanova, Paola Popesso, Annalisa Citro, Mara Salvato, Ricardo Amorín, Lucia Pozzetti, Olga Cucciati, Fergus Cullen, Pascale Hibon, Fernando Buitrago, Daniel P. Stark, Corentin Schreiber, M. Fumana, P. Franzetti, Jairo Méndez-Abreu, E. Zucca, R. C. Thomas, Filippo Mannucci, Ross J. McLure, Mark Dickinson, K. Matsuoka, M. Franco, O. Le Fèvre, Daniel Schaerer, Steve Finkelstein, M. Bolzonella, Fabio Fontanot, David J. Rosario, Eric F. Bell, Marco Castellano, A. Calabrò, Antonis Georgakakis, Mario Nonino, G. Vietri, Maurilio Pannella, G. Brammer, Marcella Brusa, David T. Maltby, Stéphanie Juneau, Bianca Garilli, Anton M. Koekemoer, Angela Bongiorno, Vivienne Wild, Giovanni G. Fazio, David Elbaz, Margherita Talia, D. J. McLeod, M. Scodeggio, Alberto Saldana-Lopez, M. Hamadouche, Italo Balestra, Omar Almaini, G. Zamorani, Eros Vanzella, Rebecca A. A. Bowler, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Garilli B., McLure R., Pentericci L., Franzetti P., Gargiulo A., Carnall A., Cucciati O., Iovino A., Amorin R., Bolzonella M., Bongiorno A., Castellano M., Cimatti A., Cirasuolo M., Cullen F., Dunlop J., Elbaz D., Finkelstein S., Fontana A., Fontanot F., Fumana M., Guaita L., Hartley W., Jarvis M., Juneau S., Maccagni D., McLeod D., Nandra K., Pompei E., Pozzetti L., Scodeggio M., Talia M., Calabro A., Cresci G., Fynbo J.P.U., Hathi N.P., Hibon P., Koekemoer A.M., Magliocchetti M., Salvato M., Vietri G., Zamorani G., Almaini O., Balestra I., Bardelli S., Begley R., Brammer G., Bell E.F., Bowler R.A.A., Brusa M., Buitrago F., Caputi C., Cassata P., Charlot S., Citro A., Cristiani S., Curtis-Lake E., Dickinson M., Fazio G., Ferguson H.C., Fiore F., Franco M., Georgakakis A., Giavalisco M., Grazian A., Hamadouche M., Jung I., Kim S., Khusanova Y., Le Fevre O., Longhetti M., Lotz J., Mannucci F., Maltby D., Matsuoka K., Mendez-Hernandez H., Mendez-Abreu J., Mignoli M., Moresco M., Nonino M., Pannella M., Papovich C., Popesso P., Roberts-Borsani G., Rosario D.J., Saldana-Lopez A., Santini P., Saxena A., Schaerer D., Schreiber C., Stark D., Tasca L.A.M., Thomas R., Vanzella E., Wild V., Williams C., Zucca E., University of St Andrews. School of Physics and Astronomy, and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)
- Subjects
SELECTION ,Galaxies: fundamental parameter ,Astrophysics ,I ,Surveys ,01 natural sciences ,observations/surveys/catalogs [Cosmology] ,Cosmology: observation ,Cosmology: Observations ,Spectral line ,statistics [Galaxies] ,DATA-REDUCTION ,QB Astronomy ,Galaxies: distances and redshift ,Galaxies: Fundamental Parameters ,010303 astronomy & astrophysics ,QC ,QB ,REDSHIFT SURVEY ,Physics ,observations [cosmology] ,Catalogs ,Cosmology: observations ,Galaxies: distances and redshifts ,Galaxies: fundamental parameters ,Galaxies: statistics ,Galaxies: Statistics ,fundamental parameters [Galaxies] ,astro-ph.CO ,Catalog ,X-RAY-PROPERTIES ,Data release ,Astrophysics - Cosmology and Nongalactic Astrophysics ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,astro-ph.GA ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Galaxies: Distances and Redshifts ,surveys ,0103 physical sciences ,STAR-FORMING GALAXIES ,distances and redshifts [Galaxies] ,Astrophysics::Galaxy Astrophysics ,010308 nuclear & particles physics ,Galaxies: statistic ,Astronomy and Astrophysics ,DAS ,VLT DEEP SURVEY ,Astrophysics - Astrophysics of Galaxies ,EVOLUTION ,STELLAR ,QC Physics ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,QUIESCENT GALAXIES ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,catalogs - Abstract
VANDELS is an ESO Public Spectroscopic Survey designed to build a sample of high signal to noise, medium resolution spectra of galaxies at redshift between 1 and 6.5. Here we present the final Public Data Release of the VANDELS Survey, comprising 2087 redshift measurements. We give a detailed description of sample selection, observations and data reduction procedures. The final catalogue reaches a target selection completeness of 40% at iAB = 25. The high Signal to Noise ratio of the spectra (above 7 in 80% of the spectra) and the dispersion of 2.5�� allowed us to measure redshifts with high precision, the redshift measurement success rate reaching almost 100%. Together with the redshift catalogue and the reduced spectra, we also provide optical mid-IR photometry and physical parameters derived through SED fitting. The observed galaxy sample comprises both passive and star forming galaxies covering a stellar mass range 8.3< Log(M*/Msolar), 16 pages, 13 figures, accepted for publication in Astronomy & Astrophysics
- Published
- 2021
- Full Text
- View/download PDF
27. The ALPINE-ALMA [CII] survey : dust mass budget in the early Universe
- Author
-
John D. Silverman, S. Bardelli, E. Zucca, Y. Khusanova, Roberto Decarli, Roberto Maiolino, M. Romano, Margherita Talia, Dominik A. Riechers, Peter Capak, Nimish P. Hathi, G. Zamorani, G. Rodighiero, Livia Vallini, A. Enia, Matthieu Béthermin, O. Le Fèvre, Anton M. Koekemoer, Y. Fudamoto, Paolo Cassata, Andrea Cimatti, Michele Ginolfi, Andreas L. Faisst, Lin Yan, Daniel Schaerer, Miroslava Dessauges-Zavadsky, Médéric Boquien, Francesca Pozzi, F. Loiacono, G. C. Jones, Carlotta Gruppioni, Desika Narayanan, Brian C. Lemaux, Francesco Calura, Daniela Vergani, Pozzi, F., Calura, F., Fudamoto, Y., Dessauges-Zavadsky, M., Gruppioni, C., Talia, M., Zamorani, G., Bethermin, M., Cimatti, A., Enia, A., Khusanova, Y., Decarli, R., Le Fevre, O., Capak, P., Cassata, P., Faisst, A. L., Yan, L., Schaerer, D., Silverman, J., Bardelli, S., Boquien, M., Narayanan, D., Ginolfi, M., Hathi, N. P., Jones, G. C., Koekemoer, A. M., Lemaux, B. C., Loiacono, F., Maiolino, R., Riechers, D. A., Rodighiero, G., Romano, M., Vallini, L., Vergani, D., Zucca, E., Jones, Gareth [0000-0002-0267-9024], Maiolino, Roberto [0000-0002-4985-3819], Apollo - University of Cambridge Repository, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Pozzi F., Calura F., Fudamoto Y., Dessauges-Zavadsky M., Gruppioni C., Talia M., Zamorani G., Bethermin M., Cimatti A., Enia A., Khusanova Y., Decarli R., Le Fevre O., Capak P., Cassata P., Faisst A.L., Yan L., Schaerer D., Silverman J., Bardelli S., Boquien M., Narayanan D., Ginolfi M., Hathi N.P., Jones G.C., Koekemoer A.M., Lemaux B.C., Loiacono F., Maiolino R., Riechers D.A., Rodighiero G., Romano M., Vallini L., Vergani D., and Zucca E.
- Subjects
Extinction (astronomy) ,Continuum (design consultancy) ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Disc galaxy ,01 natural sciences ,Luminosity ,high-redshift [Galaxies] ,Settore FIS/05 - Astronomia e Astrofisica ,galaxies: high-redshift ,0103 physical sciences ,ISM [Galaxies] ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Luminosity function (astronomy) ,Physics ,010308 nuclear & particles physics ,extinction ,Astronomy and Astrophysics ,Dust ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,Redshift ,[SDU]Sciences of the Universe [physics] ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,Elliptical galaxy ,dust ,dust, extinction ,Astrophysics::Earth and Planetary Astrophysics ,galaxies: ISM - Abstract
The dust content of normal galaxies and the dust mass density (DMD) at high-z (z>4) are unconstrained given the source confusion and the sensitivity limitations of previous observations. The ALMA Large Program to INvestigate [CII] at Early Times (ALPINE), which targeted 118 UV-selected star-forming galaxies at 4.4, Comment: 16 pages, 6 figures. Accepted for publication in A&A
- Published
- 2021
- Full Text
- View/download PDF
28. The ALPINE-ALMA [CII] survey: Obscured star formation rate density and main sequence of star-forming galaxies at z > 4
- Author
-
Miroslava Dessauges-Zavadsky, Francesca Pozzi, F. Loiacono, Daniela Vergani, Dominik A. Riechers, Michele Ginolfi, Pascal Oesch, M. Romano, G. C. Jones, Carlotta Gruppioni, Peter Capak, O. Le Fèvre, G. Zamorani, Daniel Schaerer, Paolo Cassata, Andreas L. Faisst, Ricardo Amorín, Sune Toft, Médéric Boquien, E. Zucca, Nimish P. Hathi, Brian C. Lemaux, Andrea Cimatti, John D. Silverman, Anton M. Koekemoer, Margherita Talia, Roberto Maiolino, Y. Khusanova, Lin Yan, Y. Fudamoto, Matthieu Béthermin, S. Bardelli, Guilaine Lagache, Khusanova Y., Bethermin M., Le Fevre O., Capak P., Faisst A.L., Schaerer D., Silverman J.D., Cassata P., Yan L., Ginolfi M., Fudamoto Y., Loiacono F., Amorin R., Bardelli S., Boquien M., Cimatti A., Dessauges-Zavadsky M., Gruppioni C., Hathi N.P., Jones G.C., Koekemoer A.M., Lagache G., Maiolino R., Lemaux B.C., Oesch P., Pozzi F., Riechers D.A., Romano M., Talia M., Toft S., Vergani D., Zamorani G., and Zucca E.
- Subjects
EMISSION-LINES ,SPECTROSCOPIC SURVEY ,Stellar mass ,ULTRA DEEP FIELD ,Continuum (design consultancy) ,BILLION YEARS ,galaxies [submillimeter] ,Astrophysics ,Star (graph theory) ,01 natural sciences ,Luminosity ,0103 physical sciences ,NUMBER COUNTS ,Proxy (statistics) ,PHOTOMETRIC REDSHIFTS ,010303 astronomy & astrophysics ,evolution [galaxies] ,Physics ,DUST ATTENUATION ,Galaxies: star formation ,UV LUMINOSITY FUNCTIONS ,010308 nuclear & particles physics ,Star formation ,Galaxies: high-redshift ,Galaxies: evolution ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,Redshift ,LYMAN-BREAK GALAXIES ,Submillimeter: galaxies ,Space and Planetary Science ,STELLAR MASS FUNCTION ,star formation [galaxies] ,high-redshift [galaxies] - Abstract
Star formation rate (SFR) measurements at z>4 have relied mostly on rest-frame far-ultraviolet (FUV) observations. The corrections for dust attenuation based on IRX-$\beta$ relation are highly uncertain and are still debated in the literature. Hence, rest-frame far-infrared (FIR) observations are necessary to constrain the dust-obscured component of the SFR. In this paper, we exploit the rest-frame FIR continuum observations collected by the ALMA Large Program to INvestigate [CII] at Early times (ALPINE) to directly constrain the obscured SFR in galaxies at 4.4, Comment: submitted to A&A, 19 pages
- Published
- 2021
- Full Text
- View/download PDF
29. Less and more IGM-transmitted galaxies from z ∼ 2.7 to z ∼ 6 from VANDELS and VUDS
- Author
-
E. Zucca, J. P. U. Fynbo, Margherita Talia, Ricardo Amorín, Anton M. Koekemoer, Y. Khusanova, Stefano Cristiani, Pascale Hibon, Laura Pentericci, Marco Castellano, F. Mannucci, Daniel Schaerer, S. Bardelli, V. Le Brun, Andrea Cimatti, R. Thomas, B. Garilli, M. Franco, O. Le Fevre, Adriana Gargiulo, Giovanni Cresci, Fabio Fontanot, Nimish P. Hathi, Brian C. Lemaux, G. Zamorani, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Thomas R., Pentericci L., Le Fevre O., Koekemoer A.M., Castellano M., Cimatti A., Fontanot F., Gargiulo A., Garilli B., Talia M., Amorin R., Bardelli S., Cristiani S., Cresci G., Franco M., Fynbo J.P.U., Hathi N.P., Hibon P., Khusanova Y., Le Brun V., Lemaux B.C., Mannucci F., Schaerer D., Zamorani G., and Zucca E.
- Subjects
Physics ,0303 health sciences ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Cosmology: miscellaneou ,Astrophysics::Instrumentation and Methods for Astrophysics ,FOS: Physical sciences ,Astronomy and Astrophysics ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,03 medical and health sciences ,Space and Planetary Science ,galaxies: high-redshift ,Intergalactic medium ,Astrophysics of Galaxies (astro-ph.GA) ,0103 physical sciences ,intergalactic medium ,cosmology: miscellaneous ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,030304 developmental biology ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Aim. Our aim is to analyse the variance of the Inter-Galactic Medium transmission (IGM) by studying this parameter in the rest-frame UV spectra of a large sample of high redshift galaxies. Method. We make use of the VIMOS Ultra Deep Survey and the VANDELS public survey to have an insight into the far UV spectrum of $2.7, Comment: Accepted for publication on A&A
- Published
- 2021
- Full Text
- View/download PDF
30. The ALPINE-ALMA [C II] Survey: [C II] 158 μm Emission Line Luminosity Functions at z ~ 4–6
- Author
-
L. A. M. Tasca, E. Ibar, Peter Capak, Sune Toft, Livia Vallini, Miroslava Dessauges-Zavadsky, Michele Ginolfi, Francesca Pozzi, F. Loiacono, Nimish P. Hathi, Andreas L. Faisst, E. Zucca, A. Cimatti, Anna Sajina, G. Zamorani, Paolo Cassata, G. C. Jones, M. Bethermin, Lin Yan, Margherita Talia, Carlotta Gruppioni, S. Bardelli, John D. Silverman, D. Vergani, O. Le Fevre, Pascal Oesch, G. Lagache, Brian Lemaux, Dominik Riechers, Anton M. Koekemoer, Daniel Schaerer, Yan, L., Sajina, A., Loiacono, F., Lagache, G., Bethermin, M., Faisst, A., Ginolfi, M., Fevre, O. L., Gruppioni, C., Capak, P. L., Cassata, P., Schaerer, D., Silverman, J. D., Bardelli, S., Dessauges-Zavadsky, M., Cimatti, A., Hathi, N. P., Lemaux, B. C., Ibar, E., Jones, G. C., Koekemoer, A. M., Oesch, P. A., Talia, M., Pozzi, F., Riechers, D. A., Tasca, L. A. M., Toft, S., Vallini, L., Vergani, D., Zamorani, G., Zucca, E., Yan L., Sajina A., Loiacono F., Lagache G., Bethermin M., Faisst A., Ginolfi M., Fevre O.L., Gruppioni C., Capak P.L., Cassata P., Schaerer D., Silverman J.D., Bardelli S., Dessauges-Zavadsky M., Cimatti A., Hathi N.P., Lemaux B.C., Ibar E., Jones G.C., Koekemoer A.M., Oesch P.A., Talia M., Pozzi F., Riechers D.A., Tasca L.A.M., Toft S., Vallini L., Vergani D., Zamorani G., Zucca E., Caltech Department of Astronomy [Pasadena], and California Institute of Technology (CALTECH)
- Subjects
010504 meteorology & atmospheric sciences ,[SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] ,Population ,FOS: Physical sciences ,Emission line galaxie ,Astrophysics ,01 natural sciences ,Luminosity ,Warm ionized medium ,Warm neutral medium ,Settore FIS/05 - Astronomia e Astrofisica ,0103 physical sciences ,Emission spectrum ,education ,010303 astronomy & astrophysics ,0105 earth and related environmental sciences ,Line (formation) ,Luminosity function (astronomy) ,Physics ,education.field_of_study ,Molecular gas ,Luminosity function ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Redshift ,High-redshift galaxie ,13. Climate action ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,[SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA] ,Order of magnitude - Abstract
We present the [CII]158$\mu$m line luminosity functions (LFs) at $z\sim4-6$ using the ALMA observations of 118 sources, which are selected to have UV luminosity $M_{1500A}10^9L_{\odot}$, suggesting that UV-faint but [CII]-bright sources likely make a significant contributions to the [CII] emitter volume density. When we include all the LF estimates, we find that available model predictions underestimate the number densities of [CII] emitters at $z\sim4-6$. Finally, we set a constraint on the molecular gas mass density at $z\sim4-6$, with $\rho_{mol} \sim (2-7)\times10^7M_\odot$\,Mpc$^{-3}$. This is broadly consistent with previous studies., Comment: 17 pages, 9 Figures, Update to match with the published version. Accepted for the publication in ApJ
- Published
- 2020
- Full Text
- View/download PDF
31. The ALPINE-ALMA [CII] survey:Molecular gas budget in the early Universe as traced by [CII]
- Author
-
Andrea Cimatti, S. Bardelli, Andreas L. Faisst, E. Zucca, G. Rodighiero, Y. Khusanova, Daniel Schaerer, Pascal Oesch, Sune Toft, Paolo Cassata, Livia Vallini, Nimish P. Hathi, Carlotta Gruppioni, M. Romano, Francesca Pozzi, F. Loiacono, G. Zamorani, Michele Ginolfi, Lin Yan, John D. Silverman, Miroslava Dessauges-Zavadsky, Anton M. Koekemoer, Y. Fudamoto, G. C. Jones, Desika Narayanan, Margherita Talia, Brian C. Lemaux, Daniela Vergani, Seiji Fujimoto, Peter Capak, Edo Ibar, Médéric Boquien, Matthieu Béthermin, O. Le Fevre, Ricardo Amorín, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Dessauges-Zavadsky M., Ginolfi M., Pozzi F., Bethermin M., Le Fevre O., Fujimoto S., Silverman J.D., Jones G.C., Vallini L., Schaerer D., Faisst A.L., Khusanova Y., Fudamoto Y., Cassata P., Loiacono F., Capak P.L., Yan L., Amorin R., Bardelli S., Boquien M., Cimatti A., Gruppioni C., Hathi N.P., Ibar E., Koekemoer A.M., Lemaux B.C., Narayanan D., Oesch P.A., Rodighiero G., Romano M., Talia M., Toft S., Vergani D., Zamorani G., Zucca E., Dessauges-Zavadsky, M., Ginolfi, M., Pozzi, F., Bethermin, M., Le Fevre, O., Fujimoto, S., Silverman, J. D., Jones, G. C., Vallini, L., Schaerer, D., Faisst, A. L., Khusanova, Y., Fudamoto, Y., Cassata, P., Loiacono, F., Capak, P. L., Yan, L., Amorin, R., Bardelli, S., Boquien, M., Cimatti, A., Gruppioni, C., Hathi, N. P., Ibar, E., Koekemoer, A. M., Lemaux, B. C., Narayanan, D., Oesch, P. A., Rodighiero, G., Romano, M., Talia, M., Toft, S., Vergani, D., Zamorani, G., and Zucca, E.
- Subjects
C-II ,Stellar mass ,MASS-METALLICITY RELATION ,FOS: Physical sciences ,DUST ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,CONVERSION FACTOR ,SCALING RELATIONS ,01 natural sciences ,Settore FIS/05 - Astronomia e Astrofisica ,galaxies: high-redshift ,0103 physical sciences ,STAR-FORMING GALAXIES ,Astrophysics::Solar and Stellar Astrophysics ,MAIN-SEQUENCE ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,evolution [galaxies] ,molecules [ISM] ,Physics ,LEGACY SURVEY ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,ISM [galaxies] ,010308 nuclear & particles physics ,Star formation ,Gas depletion ,Gas supply ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Galaxy ,ISM: molecules ,EVOLUTION ,MODEL ,Space and Planetary Science ,[SDU]Sciences of the Universe [physics] ,Astrophysics of Galaxies (astro-ph.GA) ,Halo ,galaxies: evolution ,Cosmic time ,galaxies: ISM ,high-redshift [galaxies] - Abstract
The molecular gas content of normal galaxies at z>4 is poorly constrained, because the commonly used molecular gas tracers become hard to detect. We use the [CII]158um luminosity, recently proposed as a molecular gas tracer, to estimate the molecular gas content in a large sample of main-sequence star-forming galaxies at z=4.4-5.9, with a median stellar mass of 10^9.7 Msun, drawn from the ALMA Large Program to INvestigate [CII] at Early times (ALPINE) survey. The agreement between molecular gas masses derived from [CII] luminosity, dynamical mass, and rest-frame 850um luminosity, extrapolated from the rest-frame 158um continuum, supports [CII] as a reliable tracer of molecular gas in our sample. We find a continuous decline of the molecular gas depletion timescale from z=0 to z=5.9, which reaches a mean value of (4.6+/-0.8)x10^8 yr at z~5.5, only a factor of 2-3 shorter than in present-day galaxies. This suggests a mild enhancement of star formation efficiency toward high redshifts, unless the molecular gas fraction significantly increases. Our estimates show that the rise in molecular gas fraction as reported previously, flattens off above z~3.7 to achieve a mean value of 63%+/-3 over z=4.4-5.9. This redshift evolution of the gas fraction is in line with the one of the specific star formation rate. We use multi-epoch abundance matching to follow the gas fraction evolution over cosmic time of progenitors of z=0 Milky Way-like galaxies in 10^13 Msun halos and of more massive z=0 galaxies in 10^14 Msun halos. Interestingly, the former progenitors show a monotonic decrease of the gas fraction with cosmic time, while the latter show a constant gas fraction from z=5.9 to z~2 and a decrease at z, 16 pages, 9 figures, 2 tables. Submitted to Astronomy & Astrophysics
- Published
- 2020
- Full Text
- View/download PDF
32. The ALPINE-ALMA [CII] survey: Dust attenuation properties and obscured star formation at z~4.4-5.8
- Author
-
Anton M. Koekemoer, Margherita Talia, Guilaine Lagache, Ricardo Amorín, Desika Narayanan, G. Rodighiero, Sune Toft, Brian C. Lemaux, G. Zamorani, Miroslava Dessauges-Zavadsky, Livia Vallini, Y. Khusanova, Matthieu Béthermin, Roberto Maiolino, Andrea Cimatti, Lin Yan, Daniela Vergani, Y. Fudamoto, Francesca Pozzi, Nimish P. Hathi, F. Loiacono, Michele Ginolfi, Edo Ibar, Seiji Fujimoto, S. Bardelli, Médéric Boquien, G. C. Jones, Carlotta Gruppioni, Daniel Schaerer, Andreas L. Faisst, O. Le Fèvre, E. Zucca, Dominik A. Riechers, John D. Silverman, Pascal Oesch, Peter Capak, Paolo Cassata, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Fudamoto Y., Oesch P.A., Faisst A., Bethermin M., Ginolfi M., Khusanova Y., Loiacono F., Le Fevre O., Capak P., Schaerer D., Silverman J.D., Cassata P., Yan L., Amorin R., Bardelli S., Boquien M., Cimatti A., Dessauges-Zavadsky M., Fujimoto S., Gruppioni C., Hathi N.P., Ibar E., Jones G.C., Koekemoer A.M., Lagache G., Lemaux B.C., Maiolino R., Narayanan D., Pozzi F., Riechers D.A., Rodighiero G., Talia M., Toft S., Vallini L., Vergani D., Zamorani G., Zucca E., Fudamoto, Y., Oesch, P. A., Faisst, A., Bethermin, M., Ginolfi, M., Khusanova, Y., Loiacono, F., Le Fevre, O., Capak, P., Schaerer, D., Silverman, J. D., Cassata, P., Yan, L., Amorin, R., Bardelli, S., Boquien, M., Cimatti, A., Dessauges-Zavadsky, M., Fujimoto, S., Gruppioni, C., Hathi, N. P., Ibar, E., Jones, G. C., Koekemoer, A. M., Lagache, G., Lemaux, B. C., Maiolino, R., Narayanan, D., Pozzi, F., Riechers, D. A., Rodighiero, G., Talia, M., Toft, S., Vallini, L., Vergani, D., Zamorani, G., Zucca, E., Jones, Gareth [0000-0002-0267-9024], Maiolino, Roberto [0000-0002-4985-3819], and Apollo - University of Cambridge Repository
- Subjects
Stellar mass ,Extinction (astronomy) ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,high-redshift [Galaxies] ,Settore FIS/05 - Astronomia e Astrofisica ,galaxies: high-redshift ,0103 physical sciences ,ISM [Galaxies] ,Astrophysics::Solar and Stellar Astrophysics ,010303 astronomy & astrophysics ,Reionization ,Astrophysics::Galaxy Astrophysics ,Physics ,Infrared excess ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,010308 nuclear & particles physics ,Star formation ,extinction ,Astronomy and Astrophysics ,Dust ,Extinction ,Atacama Large Millimeter Array ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Galaxy ,Space and Planetary Science ,[SDU]Sciences of the Universe [physics] ,Astrophysics of Galaxies (astro-ph.GA) ,dust ,Astrophysics::Earth and Planetary Astrophysics ,galaxies: ISM - Abstract
We present dust attenuation properties of spectroscopically confirmed star forming galaxies on the main sequence at a redshift of ~4.4-5.8. Our analyses are based on the far infrared continuum observations of 118 galaxies at rest-frame 158��m obtained with the Atacama Large Millimeter Array (ALMA) Large Program to INvestigate [CII] at Early times (ALPINE). We study the connection between the ultraviolet (UV) spectral slope ($��$), stellar mass (M_*), and infrared excess (IRX=L_IR/L_UV). Twenty-three galaxies are individually detected in the continuum at >3.5 sigma significance. We perform a stacking analysis using both detections and nondetections to study the average dust attenuation properties at z~4.4-5.8. The individual detections and stacks show that the IRX-$��$ relation at z~5 is consistent with a steeper dust attenuation curve than typically found at lower redshifts (z4. Similarly, we find that our galaxies have lower IRX values, up to 1dex on average, at a fixed mass compared to previously studied IRX-M_* relations at z4 are characterised by (i) a steeper attenuation curve than at z10) at z~5-6 already exhibit an obscured fraction of star formation of ~45%, indicating a rapid build-up of dust during the epoch of reionization., 12 pages, 6 figures. accepted for publication in Astronomy & Astrophysics. Minor revisions
- Published
- 2020
- Full Text
- View/download PDF
33. The ALPINE-ALMA [CII] survey: Small Ly$\alpha$-[CII] velocity offsets in main-sequence galaxies at 4.4 < z < 6
- Author
-
G. Rodighiero, H. Mendez-Hernandez, Dominik Riechers, Seiji Fujimoto, E. Zucca, Brian C. Lemaux, Pascal Oesch, Mauro Giavalisco, Nimish P. Hathi, Andrea Cimatti, Chiara Mancini, Daniel Schaerer, L. Morselli, Y. Fudamoto, M. Bethermin, John D. Silverman, Lin Yan, Gareth J. F. Jones, M. Romano, O. Le Fevre, Andreas L. Faisst, S. Bardelli, Peter Capak, Miroslava Dessauges-Zavadsky, Paolo Cassata, Edo Ibar, Margherita Talia, Médéric Boquien, D. Vergani, Anton M. Koekemoer, G. Zamorani, Michele Ginolfi, Francesca Pozzi, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Cassata P., Morselli L., Faisst A., Ginolfi M., Bethermin M., Capak P., Le Fevre O., Schaerer D., Silverman J., Yan L., Lemaux B.C., Romano M., Talia M., Bardelli S., Boquien M., Cimatti A., Dessauges-Zavadsky M., Fudamoto Y., Fujimoto S., Giavalisco M., Hathi N.P., Ibar E., Jones G., Koekemoer A.M., Mendez-Hernandez H., Mancini C., Oesch P.A., Pozzi F., Riechers D.A., Rodighiero G., Vergani D., Zamorani G., Zucca E., Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)
- Subjects
submillimeter: galaxies ,REDSHIFT EVOLUTION ,galaxies [submillimeter] ,PHYSICAL-PROPERTIES ,Context (language use) ,Astrophysics ,01 natural sciences ,LYMAN BREAK GALAXIES ,ULTRAVIOLET-SPECTRA ,galaxies: high-redshift ,0103 physical sciences ,C II ,STAR-FORMING GALAXIES ,010303 astronomy & astrophysics ,ESCAPE FRACTION ,Line (formation) ,Physics ,Very Large Telescope ,Line-of-sight ,ISM [galaxies] ,010308 nuclear & particles physics ,Astronomy and Astrophysics ,DUST CONTENT ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Galaxy ,COSMOS FIELD ,Interstellar medium ,Space and Planetary Science ,LY-ALPHA RADIATION ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Equivalent width ,galaxies: ISM ,high-redshift [galaxies] ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
The Lya line in the UV and the [CII] line in the FIR are widely used tools to identify galaxies and to obtain insights into ISM properties in the early Universe. By combining data obtained with ALMA in band 7 at ~ 320 GHz as part of the ALMA Large Program to INvestigate [CII] at Early Times (ALPINE) with spectroscopic data from DEIMOS at Keck, VIMOS and FORS2 at the VLT, we assembled a unique sample of 53 main-sequence star-forming galaxies at 4.4 < z < 6 in which we detect both the Lya line and the [CII]. We used [CII], observed with ALMA, as a tracer of the systemic velocity of the galaxies, and we find that 90% of the selected objects have Lya-[CII] velocity offsets in the range 0 < Dv_Lya-[CII] < 400 km/s, in line with the few measurements available so far in the early Universe, and significantly smaller than those observed at lower z. We observe ISM-[CII] offsets in the range -500 < Dv_ISM-[CII] < 0 km/s, in line with values at all redshifts. We find significant anticorrelations between Dv_Lya-[CII] and the Lya rest-frame equivalent width EW0(Lya) (or equivalently, the Lya escape fraction f_esc(Lya)). According to available models for the radiative transfer of Lya photons, the escape of Lya photons would be favored in galaxies with high outflow velocities, in agreement with our observations. The uniform shell model would also predict that the Lya escape in galaxies with slow outflows (0 < v_out < 300 km/s) is mainly determined by the neutral hydrogen column density (NHI), while the alternative model by Steidel+10 would favor a combination of NHI and covering fraction as driver of the Lya escape. We suggest that the observed increase in Lya escape that is observed between z~2 and z~6 is not due to a higher incidence of fast outflows at high redshift, but rather to a decrease in average NHI along the line of sight, or alternatively, a decrease in HI covering fraction. [abridged], Comment: 22 pages, 6 figures, accepted for publication in A&A. This version replaces the previous one
- Published
- 2020
- Full Text
- View/download PDF
34. High-redshift AGN in the Chandra Deep Fields: the obscured fraction and space density of the sub-L* population
- Author
-
Yongquan Xue, W. N. Brandt, Maurizio Paolillo, Donald P. Schneider, Guang Yang, Anton M. Koekemoer, B. Luo, Andrea Comastri, Jun Xian Wang, M. Volonteri, Piero Ranalli, Roberto Gilli, Ohad Shemmer, Cristian Vignali, Teng Liu, Bret D. Lehmer, Fabio Vito, ITA, USA, Vito, F., Brandt, W. N., Yang, G., Gilli, R., Luo, B., Vignali, C., Xue, Y. Q., Comastri, A., Koekemoer, A. M., Lehmer, B. D., Liu, T., Paolillo, M., Ranalli, P., Schneider, D. P., Shemmer, O., Volonteri, M., Wang, J., Brandt, W.N., Xue, Y.Q., Koekemoer, A.M., Lehmer, B.D., and Schneider, D.P.
- Subjects
ACTIVE GALACTIC NUCLEI ,SPECTROSCOPIC SURVEY ,Astrophysics::High Energy Astrophysical Phenomena ,galaxies: active ,Population ,RAY LUMINOSITY FUNCTION ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Space (mathematics) ,STAR-FORMATION RATE ,01 natural sciences ,Luminosity ,Accretion rate ,SUPERMASSIVE BLACK-HOLES ,galaxies: high-redshift ,0103 physical sciences ,Astrophysics::Solar and Stellar Astrophysics ,survey ,education ,PHOTOMETRIC REDSHIFTS ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Luminosity function (astronomy) ,XMM-NEWTON ,Physics ,education.field_of_study ,010308 nuclear & particles physics ,Star formation ,Astronomy ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies ,NORTH SURVEY ,Galaxy ,Redshift ,HOST GALAXIES ,X-rays: galaxies ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,X-RAY ,galaxies: evolution ,methods: data analysi ,X-rays: galaxie - Abstract
We investigate the population of high-redshift ($3\leq z < 6$) AGN selected in the two deepest X-ray surveys, the 7 Ms \textit{Chandra} Deep Field-South and 2 Ms \textit{Chandra} Deep Field-North. Their outstanding sensitivity and spectral characterization of faint sources allow us to focus on the sub-$L_*$ regime (log$L_{\mathrm{X}}\lesssim44$), poorly sampled by previous works using shallower data, and the obscured population. Taking fully into account the individual photometric-redshift probability distribution functions, the final sample consists of $\approx102$ X-ray selected AGN at $3\leq z < 6$. The fraction of AGN obscured by column densities log$N_{\mathrm{H}}>23$ is $\sim0.6-0.8$, once incompleteness effects are taken into account, with no strong dependence on redshift or luminosity. We derived the high-redshift AGN number counts down to $F_{\mathrm{0.5-2\,keV}}=7\times10^{-18}\,\mathrm{erg\,cm^{-2}\,s^{-1}}$, extending previous results to fainter fluxes, especially at $z>4$. We put the tightest constraints to date on the low-luminosity end of AGN luminosity function at high redshift. The space-density, in particular, declines at $z>3$ at all luminosities, with only a marginally steeper slope for low-luminosity AGN. By comparing the evolution of the AGN and galaxy densities, we suggest that such a decline at high luminosities is mainly driven by the underlying galaxy population, while at low luminosities there are hints of an intrinsic evolution of the parameters driving nuclear activity. Also, the black-hole accretion rate density and star-formation rate density, which are usually found to evolve similarly at $z\lesssim3$, appear to diverge at higher redshifts., Accepted 2017 September 15 (MNRAS). 31 Pages, 25 figures
- Published
- 2017
- Full Text
- View/download PDF
35. Tracing the accretion history of supermassive black holes through X-ray variability: results from the ChandraDeep Field-South
- Author
-
C. Vignali, X. C. Zheng, Guang Yang, Tong Liu, I. E. Papadakis, Roberto Gilli, Andrea Comastri, Anton M. Koekemoer, Paolo Tozzi, Franz E. Bauer, Ohad Shemmer, Maurizio Paolillo, Jun Xian Wang, Fabio Vito, W. N. Brandt, Viola Allevato, Bin Luo, Yongquan Xue, Paolillo, M., Papadakis, I., Brandt, W. N., Luo, B., Xue, Y. Q., Tozzi, P., Shemmer, O., Allevato, V., Bauer, F. E., Comastri, A., Gilli, R., Koekemoer, A. M., Liu, T., Vignali, C., Vito, F., Yang, G., Wang, J. X., Zheng, X. C., Brandt, W.N., Xue, Y.Q., Bauer, F.E., Koekemoer, A.M., Wang, J.X., Zheng, X.C., ITA, USA, CHN, and Department of Physics
- Subjects
galaxie [X-rays] ,TIME VARIABILITY ,Astrophysics ,01 natural sciences ,high-redshift [Galaxies] ,010303 astronomy & astrophysics ,Galaxies: nuclei ,High Energy Astrophysical Phenomena (astro-ph.HE) ,Physics ,Quasars: supermassive black hole ,quasars: supermassive black holes ,X-ray ,Galaxies: active ,GALAXIES ,nuclei [Galaxies] ,Chandra Deep Field South ,RXTE ,Astrophysics - High Energy Astrophysical Phenomena ,X-rays: galaxie ,COMBINED LONG ,Astrophysics - Cosmology and Nongalactic Astrophysics ,ACTIVE GALACTIC NUCLEI ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Active galactic nucleus ,active [Galaxies] ,Astrophysics::High Energy Astrophysical Phenomena ,FOS: Physical sciences ,ABSORPTION-LINE VARIABILITY ,Astrophysics::Cosmology and Extragalactic Astrophysics ,LOCKMAN HOLE ,QUASAR ,0103 physical sciences ,supermassive black hole [Quasars] ,Astrophysics::Galaxy Astrophysics ,XMM-NEWTON ,Supermassive black hole ,010308 nuclear & particles physics ,Galaxies: high-redshift ,Astronomy ,Astronomy and Astrophysics ,Quasar ,Astronomy and Astrophysic ,115 Astronomy, Space science ,MULTIYEAR TIMESCALES ,Accretion (astrophysics) ,Galaxy ,X-rays: galaxies ,13. Climate action ,Space and Planetary Science - Abstract
We study the X-ray variability properties of distant AGNs in the Chandra Deep Field-South region over 17 years, up to $z\sim 4$, and compare them with those predicted by models based on local samples. We use the results of Monte Carlo simulations to account for the biases introduced by the discontinuous sampling and the low-count regime. We confirm that variability is an ubiquitous property of AGNs, with no clear dependence on the density of the environment. The variability properties of high-z AGNs, over different temporal timescales, are most consistent with a Power Spectral Density (PSD) described by a broken (or bending) power-law, similar to nearby AGNs. We confirm the presence of an anti-correlation between luminosity and variability, resulting from the dependence of variability on BH mass and accretion rate. We explore different models, finding that our acceptable solutions predict that BH mass influences the value of the PSD break frequency, while the Eddington ratio $\lambda_{Edd}$ affects the PSD break frequency and, possibly, the PSD amplitude as well. We derive the evolution of the average $\lambda_{Edd}$ as a function of redshift, finding results in agreement with measurements based on different estimators. The large statistical uncertainties make our results consistent with a constant Eddington ratio, although one of our models suggest a possible increase of $\lambda_{Edd}$ with lookback time up to $z\sim 2-3$. We conclude that variability is a viable mean to trace the accretion history of supermassive BHs, whose usefulness will increase with future, wide-field/large effective area X-ray missions., Comment: 15 pages, 9 Figures, 2 Tables, in press on MNRAS
- Published
- 2017
- Full Text
- View/download PDF
36. The properties of He IIλ1640 emitters at z ∼ 2.5-5 from the VANDELS survey
- Author
-
Nimish P. Hathi, Casey Papovich, M. Mirabelli, Johan P. U. Fynbo, Daniel Schaerer, Marco Castellano, Lucia Pozzetti, Adriano Fontana, G. Zamorani, O. Cucciati, B. Garilli, M. Bolzonella, Lucia Guaita, Ross J. McLure, Angela Bongiorno, Margherita Talia, F. Marchi, Adriana Gargiulo, T. Hutchison, Laura Pentericci, D. J. McLeod, Raffaella Schneider, A. Saxena, Ricardo Amorín, A. C. Carnall, Fergus Cullen, Anton M. Koekemoer, Saxena A., Pentericci L., Mirabelli M., Schaerer D., Schneider R., Cullen F., Amorin R., Bolzonella M., Bongiorno A., Carnall A.C., Castellano M., Cucciati O., Fontana A., Fynbo J.P.U., Garilli B., Gargiulo A., Guaita L., Hathi N.P., Hutchison T.A., Koekemoer A.M., Marchi F., Mcleod D.J., Mclure R.J., Papovich C., Pozzetti L., Talia M., and Zamorani G.
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Photon ,Stellar population ,Metallicity ,astro-ph.GA ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Computer Science::Computational Geometry ,01 natural sciences ,galaxies: high-redshift ,Ionization ,0103 physical sciences ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Line (formation) ,Physics ,galaxies: evolution ,010308 nuclear & particles physics ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Galaxy ,Stars ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,astro-ph.CO ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Strong He II emission is produced by low-metallicity stellar populations. Here, we aim to identify and study a sample of He II $��1640$-emitting galaxies at redshifts of $z \sim 2.5-5$ in the deep VANDELS spectroscopic survey.. We identified a total of 33 Bright He II emitters (S/N > 2.5) and 17 Faint emitters (S/N < 2.5) in the VANDELS survey and used the available deep multi-wavelength data to study their physical properties. After identifying seven potential AGNs in our sample and discarding them from further analysis, we divided the sample of \emph{Bright} emitters into 20 \emph{Narrow} (FWHM < 1000 km s$^{-1}$) and 6 \emph{Broad} (FWHM > 1000 km s$^{-1}$) He II emitters. We created stacks of Faint, Narrow, and Broad emitters and measured other rest-frame UV lines such as O III] and C III] in both individual galaxies and stacks. We then compared the UV line ratios with the output of stellar population-synthesis models to study the ionising properties of He II emitters. We do not see a significant difference between the stellar masses, star-formation rates, and rest-frame UV magnitudes of galaxies with He II and no He II emission. The stellar population models reproduce the observed UV line ratios from metals in a consistent manner, however they under-predict the total number of \heii ionising photons, confirming earlier studies and suggesting that additional mechanisms capable of producing He II are needed, such as X-ray binaries or stripped stars. The models favour subsolar metallicities ($\sim0.1Z_\odot$) and young stellar ages ($10^6 - 10^7$ years) for the He II emitters. However, the metallicity measured for He II emitters is comparable to that of non-He II emitters at similar redshifts. We argue that galaxies with He II emission may have undergone a recent star-formation event, or may be powered by additional sources of He II ionisation., 21 pages, 11 figures (including appendix), Accepted for publication in A&A
- Published
- 2020
- Full Text
- View/download PDF
37. Timing the earliest quenching events with a robust sample of massive quiescent galaxies at 2 < z < 5
- Author
-
Andrea Cimatti, Fergus Cullen, Adriano Fontana, Marco Castellano, Vivienne Wild, Lucia Pozzetti, Adriana Gargiulo, James Dunlop, Matt J. Jarvis, O. Cucciati, A. Calabrò, Ross J. McLure, D. J. McLeod, S. Walker, A. C. Carnall, Laura Pentericci, Ricardo Amorín, G. Zamorani, M. Bolzonella, B. Garilli, Anton M. Koekemoer, Nimish P. Hathi, Carnall A.C., Walker S., McLure R.J., Dunlop J.S., McLeod D.J., Cullen F., Wild V., Amorin R., Bolzonella M., Castellano M., Cimatti A., Cucciati O., Fontana A., Gargiulo A., Garilli B., Jarvis M.J., Pentericci L., Pozzetti L., Zamorani G., Calabro A., Hathi N.P., Koekemoer A.M., and University of St Andrews. School of Physics and Astronomy
- Subjects
statistical [Methods] ,astro-ph.GA ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,star formation [Galaxies] ,Methods statistical ,0103 physical sciences ,QB Astronomy ,Astrophysics::Solar and Stellar Astrophysics ,010303 astronomy & astrophysics ,QC ,Astrophysics::Galaxy Astrophysics ,QB ,Physics ,methods: statistical ,010308 nuclear & particles physics ,Astronomy and Astrophysics ,3rd-DAS ,evolution [Galaxies] ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,QC Physics ,Space and Planetary Science ,galaxies: star formation ,galaxies: evolution - Abstract
We present a sample of 151 massive ($M_* > 10^{10}\mathrm{M_\odot}$) quiescent galaxies at $2 < z < 5$, based on a sophisticated Bayesian spectral energy distribution fitting analysis of the CANDELS UDS and GOODS-South fields. Our sample includes a robust sub-sample of 61 objects for which we confidently exclude low-redshift and star-forming solutions. We identify 10 robust objects at $z>3$, of which 2 are at $z>4$. We report formation redshifts, demonstrating that the oldest objects formed at $z > 6$, however individual ages from our photometric data have significant uncertainties, typically $\sim0.5$ Gyr. We demonstrate that the UVJ colours of the quiescent population evolve with redshift at $z>3$, becoming bluer and more similar to post-starburst galaxies at lower redshift. Based upon this we construct a model for the time-evolution of quiescent galaxy UVJ colours, concluding that the oldest objects are consistent with forming the bulk of their stellar mass at $z\sim6-7$ and quenching at $z\sim5$. We report spectroscopic redshifts for two of our objects at $z=3.440$ and $3.396$, which exhibit extremely weak Ly$\alpha$ emission in ultra-deep VANDELS spectra. We calculate star-formation rates based on these line fluxes, finding that these galaxies are consistent with our quiescent selection criteria, provided their Ly$\alpha$ escape fractions are $>3$ and $>10$ per cent respectively. We finally report that our highest-redshift robust object exhibits a continuum break at $\lambda\sim7000$A in a spectrum from VUDS, consistent with our photometric redshift of $z_\mathrm{phot}=4.72^{+0.06}_{-0.04}$. If confirmed as quiescent this object would be the highest-redshift known quiescent galaxy. To obtain stronger constraints on the times of the earliest quenching events, high-SNR spectroscopy must be extended to $z\gtrsim3$ quiescent objects., Comment: 14 pages, 8 figures, MNRAS accepted
- Published
- 2020
- Full Text
- View/download PDF
38. The ALPINE-ALMA [C II] survey: a triple merger at z ∼ 4.56
- Author
-
G. C. Jones, Dominik Riechers, Y. Fudamoto, Margherita Talia, Andreas L. Faisst, Miroslava Dessauges-Zavadsky, John D. Silverman, Peter Capak, G. Rodighiero, Mauro Giavalisco, S. Bardelli, Lin Yan, G. Zamorani, Livia Vallini, E. Zucca, Matthieu Béthermin, O. Le Fevre, Paolo Cassata, Brian C. Lemaux, Carlotta Gruppioni, D. Vergani, Y. Khusanova, Michele Ginolfi, Roberto Maiolino, Francesca Pozzi, F. Loiacono, Anton M. Koekemoer, Daniel Schaerer, Edo Ibar, Médéric Boquien, Andrea Cimatti, Pascal Oesch, Jones G.C., Bethermin M., Fudamoto Y., Ginolfi M., Capak P., Cassata P., Faisst A., Le Fevre O., Schaerer D., Silverman J.D., Yan L., Bardelli S., Boquien M., Cimatti A., Dessauges-Zavadsky M., Giavalisco M., Gruppioni C., Ibar E., Khusanova Y., Koekemoer A.M., Lemaux B.C., Loiacono F., Maiolino R., Oesch P.A., Pozzi F., Riechers D., Rodighiero G., Talia M., Vallini L., Vergani D., Zamorani G., Zucca E., Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Jones, Gareth [0000-0002-0267-9024], Maiolino, Roberto [0000-0002-4985-3819], Apollo - University of Cambridge Repository, Jones, G. C., Bethermin, M., Fudamoto, Y., Ginolfi, M., Capak, P., Cassata, P., Faisst, A., Le Fevre, O., Schaerer, D., Silverman, J. D., Yan, L., Bardelli, S., Boquien, M., Cimatti, A., Dessauges-Zavadsky, M., Giavalisco, M., Gruppioni, C., Ibar, E., Khusanova, Y., Koekemoer, A. M., Lemaux, B. C., Loiacono, F., Maiolino, R., Oesch, P. A., Pozzi, F., Riechers, D., Rodighiero, G., Talia, M., Vallini, L., Vergani, D., Zamorani, G., and Zucca, E.
- Subjects
interaction [Galaxies] ,Dynamic ,FOS: Physical sciences ,Astrophysics ,01 natural sciences ,Submillimeter Array ,Physical cosmology ,high-redshift [Galaxies] ,Settore FIS/05 - Astronomia e Astrofisica ,0103 physical sciences ,kinematics [Galaxies] ,010303 astronomy & astrophysics ,galaxies: kinematics and dynamics ,Physics ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,010308 nuclear & particles physics ,Velocity gradient ,Galaxies: kinematics ,Galaxies: high-redshift ,Galaxies: evolution ,Astronomy and Astrophysics ,evolution [Galaxies] ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,Dynamics ,Galaxies: interactions ,13. Climate action ,Space and Planetary Science ,[SDU]Sciences of the Universe [physics] ,Galaxies: interaction ,Astrophysics of Galaxies (astro-ph.GA) ,Millimeter - Abstract
We report the detection of [CII]158um emission from a system of three closely-separated sources in the COSMOS field at z~4.56, as part of the ALMA Large Program to INvestigate CII at Early times (ALPINE). The two dominant sources are closely associated, both spatially (1.6"~11kpc) and in velocity (~100km/s), while the third source is slightly more distant (2.8"~18kpc, ~300km/s). The second strongest source features a slight velocity gradient, while no significant velocity gradient is seen in the other two sources. Using the observed [CII] luminosities, we derive a total log(SFR_[CII]/[Msol/year])=2.8+/-0.2, which may be split into contributions of 59%, 31%, and 10% from the central, east, and west sources, respectively. Comparison of these [CII] detections to recent zoom-in cosmological simulations suggests an ongoing major merger. We are thus witnessing a system in a major phase of mass build-up by merging, including an on-going major merger and an upcoming minor merger, which is expected to end up in a single massive galaxy by z~2.5., 5 pages, 4 figures, submitted to MNRASL
- Published
- 2020
- Full Text
- View/download PDF
39. UV and Ly$\alpha$ luminosity functions of galaxies and star formation rate density at the end of HI reionization from the VIMOS UltraDeep Survey (VUDS)
- Author
-
Paolo Cassata, F. Marchi, Marco Castellano, Laurence Tresse, Nimish P. Hathi, O. Cucciati, Janine Pforr, O. Le Fevre, Daniel Schaerer, Anton M. Koekemoer, Mauro Giavalisco, L. A. M. Tasca, Y. Khusanova, Ricardo Amorín, S. Bardelli, Laura Pentericci, R. Thomas, B. Ribeiro, D. Maccagni, Brian C. Lemaux, Daniela Vergani, Letizia P. Cassarà, E. Zucca, G. Zamorani, Andrea Cimatti, V. Le Brun, O. Ilbert, B. Garilli, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Khusanova Y., Le Fevre O., Cassata P., Cucciati O., Lemaux B.C., Tasca L.A.M., Thomas R., Garilli B., Le Brun V., MacCagni D., Pentericci L., Zamorani G., Amorin R., Bardelli S., Castellano M., Cassara L.P., Cimatti A., Giavalisco M., Hathi N.P., Ilbert O., Koekemoer A.M., Marchi F., Pforr J., Ribeiro B., Schaerer D., Tresse L., Vergani D., and Zucca E.
- Subjects
galaxies: high-redshift ,galaxies: evolution ,galaxies: formation ,galaxies: star formation ,dark ages, reionization, first stars ,galaxies: luminosity function, mass function ,Population ,first stars ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Luminosity ,0103 physical sciences ,Galaxy formation and evolution ,Astrophysics::Solar and Stellar Astrophysics ,dark ages ,education ,010303 astronomy & astrophysics ,Reionization ,Astrophysics::Galaxy Astrophysics ,Luminosity function (astronomy) ,Physics ,education.field_of_study ,010308 nuclear & particles physics ,Galaxies: luminosity function, mass function ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,Redshift ,Dark ages, reionization, first star ,galaxies: luminosity function ,Space and Planetary Science ,mass function ,reionization ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Equivalent width ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We establish a robust statistical description of the star-forming galaxy population at the end of cosmic HI reionization ($5.0\le{}z\le6.6$) from a large sample of 52 galaxies with spectroscopically confirmed redshifts from the VIMOS UltraDeep Survey. We identify galaxies with Ly$\alpha$ either in absorption or in emission, at variance with most spectroscopic samples in the literature where Ly$\alpha$ emitters dominate. We find that star-forming galaxies at these redshifts are distributed along a main sequence in the stellar mass vs. SFR plane. We report a flat evolution of the sSFR(z) in 32. The bright end of the Ly$\alpha$ luminosity function has a high number density, indicating a significant star formation activity concentrated in the brightest Ly$\alpha$ emitters (LAE) at these redshifts. LAE with EW>25\AA ~contribute to about 75\% of the total UV-derived SFRD. While our analysis favors a low dust content in 5.0, Comment: 27 pages, submitted to A&A
- Published
- 2020
- Full Text
- View/download PDF
40. The ALPINE-ALMA [CII] survey: Data processing, catalogs, and statistical source properties
- Author
-
Dominik A. Riechers, Brian C. Lemaux, Sune Toft, Livia Vallini, Daniela Vergani, Nimish P. Hathi, E. Zucca, S. Bardelli, Y. Khusanova, Ricardo Amorín, Paolo Cassata, Lin Yan, Seiji Fujimoto, Andreas L. Faisst, Iary Davidzon, Y. Fudamoto, Michele Ginolfi, O. Le Fèvre, Daniel Schaerer, G. C. Jones, Carlotta Gruppioni, Pascal Oesch, G. Zamorani, Matthieu Béthermin, Edo Ibar, Margherita Talia, C. Moreau, Francesca Pozzi, Médéric Boquien, F. Loiacono, John D. Silverman, Anton M. Koekemoer, Guilaine Lagache, Peter Capak, Andrea Cimatti, Miroslava Dessauges-Zavadsky, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Bethermin M., Fudamoto Y., Ginolfi M., Loiacono F., Khusanova Y., Capak P.L., Cassata P., Faisst A., Le Fevre O., Schaerer D., Silverman J.D., Yan L., Amorin R., Bardelli S., Boquien M., Cimatti A., Davidzon I., Dessauges-Zavadsky M., Fujimoto S., Gruppioni C., Hathi N.P., Ibar E., Jones G.C., Koekemoer A.M., Lagache G., Lemaux B.C., Moreau C., Oesch P.A., Pozzi F., Riechers D.A., Talia M., Toft S., Vallini L., Vergani D., Zamorani G., Zucca E., Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Bethermin, M., Fudamoto, Y., Ginolfi, M., Loiacono, F., Khusanova, Y., Capak, P. L., Cassata, P., Faisst, A., Le Fevre, O., Schaerer, D., Silverman, J. D., Yan, L., Amorin, R., Bardelli, S., Boquien, M., Cimatti, A., Davidzon, I., Dessauges-Zavadsky, M., Fujimoto, S., Gruppioni, C., Hathi, N. P., Ibar, E., Jones, G. C., Koekemoer, A. M., Lagache, G., Lemaux, B. C., Moreau, C., Oesch, P. A., Pozzi, F., Riechers, D. A., Talia, M., Toft, S., Vallini, L., Vergani, D., Zamorani, G., and Zucca, E.
- Subjects
submillimeter: galaxies ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Continuum (design consultancy) ,FOS: Physical sciences ,Astrophysics ,star formation [Galaxies] ,01 natural sciences ,Luminosity ,high-redshift [Galaxies] ,galaxies [Submillimeter] ,Settore FIS/05 - Astronomia e Astrofisica ,galaxies: high-redshift ,Cosmic infrared background ,ISM [Galaxies] ,0103 physical sciences ,010303 astronomy & astrophysics ,Photometric redshift ,Physics ,010308 nuclear & particles physics ,Astronomy and Astrophysics ,Atacama Large Millimeter Array ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Galaxy ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,galaxies: star formation ,Spectral energy distribution ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,galaxies: ISM ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
The ALPINE-ALMA large program targets the [CII] 158 $\mu$m line and the far-infrared continuum in 118 spectroscopically confirmed star-forming galaxies between z=4.4 and z=5.9. It represents the first large [CII] statistical sample built in this redshift range. We present details of the data processing and the construction of the catalogs. We detected 23 of our targets in the continuum. To derive accurate infrared luminosities and obscured star formation rates, we measured the conversion factor from the ALMA 158 $\mu$m rest-frame dust continuum luminosity to the total infrared luminosity (L$_{\rm IR}$) after constraining the dust spectral energy distribution by stacking a photometric sample similar to ALPINE in ancillary single-dish far-infrared data. We found that our continuum detections have a median L$_{\rm IR}$ of 4.4$\times 10^{11}$ L$_\odot$. We also detected 57 additional continuum sources in our ALMA pointings. They are at lower redshift than the ALPINE targets, with a mean photometric redshift of 2.5$\pm$0.2. We measured the 850 $\mu$m number counts between 0.35 and 3.5 mJy, improving the current interferometric constraints in this flux density range. We found a slope break in the number counts around 3 mJy with a shallower slope below this value. More than 40 % of the cosmic infrared background is emitted by sources brighter than 0.35 mJy. Finally, we detected the [CII] line in 75 of our targets. Their median [CII] luminosity is 4.8$\times$10$^8$ L$_\odot$ and their median full width at half maximum is 252 km/s. After measuring the mean obscured SFR in various [CII] luminosity bins by stacking ALPINE continuum data, we find a good agreement between our data and the local and predicted SFR-L$_{\rm [CII]}$ relations of De Looze et al. (2014) and Lagache et al. (2018)., Comment: 44 pages, 29 figures, 14 tables, accepted by A&A, ALPINE products released at https://cesam.lam.fr/a2c2s/, luminosities in table B2 corrected
- Published
- 2020
- Full Text
- View/download PDF
41. The ALPINE-ALMA [CII] survey - The nature, luminosity function, and star formation history of dusty galaxies up to z ≃ 6
- Author
-
Pascal Oesch, Paolo Cassata, Dominik A. Riechers, Giulia Rodighiero, Peter Capak, E. Zucca, Nimish P. Hathi, Daniel Schaerer, Andrea Cimatti, G. Zamorani, Andreas L. Faisst, Michele Ginolfi, O. Le Fèvre, Seiji Fujimoto, John D. Silverman, Margherita Talia, G. C. Jones, Carlotta Gruppioni, Guilaine Lagache, Matthieu Béthermin, R. Carraro, Y. Khusanova, M. Romano, S. Bardelli, Livia Vallini, Francesca Pozzi, F. Loiacono, Brian C. Lemaux, Miroslava Dessauges-Zavadsky, Lin Yan, Daniela Vergani, Anton M. Koekemoer, Médéric Boquien, INAF - Osservatorio Astronomico di Bologna (OABO), Istituto Nazionale di Astrofisica (INAF), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), California Institute of Technology (CALTECH), INAF - Osservatorio Astronomico di Padova (OAPD), Université de Genève = University of Geneva (UNIGE), The University of Tokyo (UTokyo), Universidad de Antofagasta, Universidad de Valparaiso [Chile], INAF - Osservatorio Astrofisico di Arcetri (OAA), University of Copenhagen = Københavns Universitet (UCPH), Space Telescope Science Institute (STSci), University of Cambridge [UK] (CAM), University of California (UC), Cornell University [New York], Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Università degli Studi di Padova = University of Padua (Unipd), Leiden Observatory [Leiden], Universiteit Leiden, Gruppioni, C., Bethermin, M., Loiacono, F., Le Fevre, O., Capak, P., Cassata, P., Faisst, A. L., Schaerer, D., Silverman, J., Yan, L., Bardelli, S., Boquien, M., Carraro, R., Cimatti, A., Dessauges-Zavadsky, M., Ginolfi, M., Fujimoto, S., Hathi, N. P., Jones, G. C., Khusanova, Y., Koekemoer, A. M., Lagache, G., Lemaux, B. C., Oesch, P. A., Pozzi, F., Riechers, D. A., Rodighiero, G., Romano, M., Talia, M., Vallini, L., Vergani, D., Zamorani, G., Zucca, E., Université de Genève (UNIGE), University of Copenhagen = Københavns Universitet (KU), University of California, Universita degli Studi di Padova, Universiteit Leiden [Leiden], Gruppioni C., Bethermin M., Loiacono F., Le Fevre O., Capak P., Cassata P., Faisst A.L., Schaerer D., Silverman J., Yan L., Bardelli S., Boquien M., Carraro R., Cimatti A., Dessauges-Zavadsky M., Ginolfi M., Fujimoto S., Hathi N.P., Jones G.C., Khusanova Y., Koekemoer A.M., Lagache G., Lemaux B.C., Oesch P.A., Pozzi F., Riechers D.A., Rodighiero G., Romano M., Talia M., Vallini L., Vergani D., Zamorani G., Zucca E., ITA, USA, FRA, CHL, DNK, JPN, NLD, and CHE
- Subjects
submillimeter: galaxies ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Stellar mass ,Continuum (design consultancy) ,FOS: Physical sciences ,observation [Cosmology] ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Cosmology: observation ,high-redshift [Galaxies] ,galaxies [Submillimeter] ,Settore FIS/05 - Astronomia e Astrofisica ,galaxies: high-redshift ,0103 physical sciences ,Astrophysics::Solar and Stellar Astrophysics ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Luminosity function (astronomy) ,Photometric redshift ,Physics ,010308 nuclear & particles physics ,Star formation ,Astronomy and Astrophysics ,evolution [Galaxies] ,Astrophysics - Astrophysics of Galaxies ,luminosity function [Galaxies] ,Galaxy ,Redshift ,galaxies: luminosity function ,Space and Planetary Science ,mass function ,Astrophysics of Galaxies (astro-ph.GA) ,Mass function ,cosmology: observations ,Dark galaxy ,Astrophysics::Earth and Planetary Astrophysics ,galaxies: evolution ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present the detailed characterisation of a sample of 56 sources serendipitously detected in ALMA band 7, as part of the ALMA Large Program to INvestigate CII at Early Times (ALPINE) in COSMOS and ECDFS. These sources have been used to derive the total infrared luminosity function (LF) and to estimate the cosmic star formation rate density (SFRD) up to z=6. We have looked for counterparts in all the available multi-wavelength and photometric redshift catalogues, and in deeper near- and mid-IR source lists and maps, to identify optically dark sources with no matches in the public catalogues. Our ALMA blind survey allows us to push further the study of the nature and evolution of dusty galaxies at high-z, identifying luminous and massive sources to redshifts and faint luminosities never probed before by any far-infrared surveys. The ALPINE data are the first ones to sample the faint-end of the infrared LF, showing little evolution from z=2.5 to z=6, and a flat slope up to the highest redshifts. The SFRD obtained by integrating the luminosity function remains almost constant between z=2 and 6, and significantly higher than the optical/UV derivations, showing an important contribution of dusty galaxies and obscured star formation up to high-z. About 14 per cent of the ALPINE serendipitous continuum sources are optically+near-IR dark (six show a counterpart only in the mid-IR and no HST or near-IR identification, while two are detected as [CII] emitters at z=5). The six HST and near-IR dark galaxies with mid-IR counterpart contribute for about 17 per cent of the total SFRD at z=5 and dominate the high-mass end of the stellar mass function at z>3., 26 pages, 18 figures. Accepted for publication in A&A
- Published
- 2020
- Full Text
- View/download PDF
42. The VANDELS survey: Discovery of massive overdensities of galaxies at z > 2
- Author
-
L. Guaita, M. Bolzonella, Anton M. Koekemoer, Lizhi Xie, O. Cucciati, P. Hibon, Laura Pentericci, Nimish P. Hathi, Ricardo Amorín, Emanuela Pompei, Lucia Pozzetti, R. C. Thomas, G. De Lucia, Adriana Gargiulo, G. Zamorani, F. Fontanot, M. Hirschmann, Anna Zoldan, M. Castellano, Margherita Talia, Franz E. Bauer, Ross J. McLure, Guaita L., Pompei E., Castellano M., Pentericci L., Cucciati O., Zamorani G., Zoldan A., Fontanot F., Bauer F.E., Amorin R., Bolzonella M., De Lucia G., Gargiulo A., Hathi N.P., Hibon P., Hirschmann M., Koekemoer A.M., McLure R., Pozzetti L., Talia M., Thomas R., and Xie L.
- Subjects
Physics ,Field (physics) ,010308 nuclear & particles physics ,Galaxies: high-redshift ,Galaxies: kinematics and dynamics ,Astronomy and Astrophysics ,Context (language use) ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,01 natural sciences ,Galaxy ,Redshift ,Stars ,Gravitational potential ,Galaxies: interaction ,Space and Planetary Science ,0103 physical sciences ,Cluster (physics) ,Outflow ,Galaxies: clusters: general ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics - Abstract
Context. The advent of deep, multi-wavelength surveys, together with the availability of extensive numerical simulations, now allow us for the systematic search and study of (proto)clusters and their surrounding environment as a function of redshift. Aims. We aim to define the environment and to identify overdensities in the VANDELS Chandra Deep Field-South (CDFS) and UKIDSS Ultra Deep Survey (UDS) fields. We want to investigate whether we can use Lyα emission to obtain additional information of the environment properties and whether Lyα emitters show different characteristics as a function of their environment. Methods. We estimated local densities using a three-dimensional algorithm which works in the RA-dec-redshift space. We took advantage of the physical parameters of all the sources in the VANDELS fields to study their properties as a function of environment. In particular, we focused on the rest-frame U − V color to evaluate the stage of evolution of the galaxies located in the overdensities and in the field. Then we selected a sample of 131 Lyα-emitting galaxies (EW(Lyα) > 0 Å), unbiased with respect to environmental density, from the first two seasons of the VANDELS survey to study their location with respect to the over- or under-dense environment and infer whether they are useful tracers of overdense regions. Results. We identify 13 (proto)cluster candidates in the CDFS and nine in the UDS at 2 < z < 4, based on photometric and spectroscopic redshifts from VANDELS and from all the available literature. No significant difference is observed in the rest-frame U − V color between field and galaxies located within the identified overdensities, but the star-forming galaxies in overdense regions tend to be more massive and to have low specific SFRs than in the field. We study the distribution of the VANDELS Lyα emitters (LAEVs) and we find that Lyα emitters lie preferentially outside of overdense regions as the majority of the galaxies with spectroscopic redshifts from VANDELS. The LAEVs in overdense regions tend to have low Lyα equivalent widths and low specific SFRs, and they also tend to be more massive than the LAEVs in the field. Their stacked Lyα profile shows a dominant red peak and a hint of a blue peak. There is evidence that their Lyα emission is more extended and offset with respect to the UV continuum. Conclusions. LAEVs are likely to be influenced by the environment. In fact, our results favour a scenario that implies outflows of low expansion velocities and high HI column densities for galaxies in overdense regions. An outflow with low expansion velocity could be related to the way galaxies are forming stars in overdense regions; the high HI column density can be a consequence of the gravitational potential of the overdensity. Therefore, Lyα-emitting galaxies can provide useful insights on the environment in which they reside.
- Published
- 2020
- Full Text
- View/download PDF
43. Physical Characterization of an Unlensed, Dusty Star-forming Galaxy at z = 5.85
- Author
-
Jaclyn B. Champagne, Johannes Staguhn, Patrick Drew, Min Yun, Sune Toft, Christopher C. Hayward, Georgios E. Magdis, Steven L. Finkelstein, Elisabete da Cunha, Anton M. Koekemoer, Kirsten Kraiberg Knudsen, Jeyhan S. Kartaltepe, Yoshiaki Taniguchi, David L. Clements, Nick Scoville, Caitlin M. Casey, Sinclaire M. Manning, Kartik Sheth, Manuel Aravena, Karina Caputi, Justin Spilker, Matthieu Béthermin, Allison W. S. Man, Margherita Talia, Ezequiel Treister, Jorge A. Zavala, Casey C.M., Zavala J.A., Aravena M., Bethermin M., Caputi K.I., Champagne J.B., Clements D.L., Cunha E.D., Drew P., Finkelstein S.L., Hayward C.C., Kartaltepe J.S., Knudsen K., Koekemoer A.M., Magdis G.E., Man A., Manning S.M., Scoville N.Z., Sheth K., Spilker J., Staguhn J., Talia M., Taniguchi Y., Toft S., Treister E., Yun M., Astronomy, Laboratoire d'Astrophysique de Marseille (LAM), and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Infrared galaxies ,010504 meteorology & atmospheric sciences ,Stellar mass ,Star (game theory) ,INFRARED-EMISSION ,MU-M ,FOS: Physical sciences ,Starburst galaxies ,Astrophysics ,Astronomy & Astrophysics ,01 natural sciences ,Submillimeter Array ,0201 Astronomical and Space Sciences ,0103 physical sciences ,Infrared galaxie ,SOURCE CATALOG ,010303 astronomy & astrophysics ,Blank field ,0105 earth and related environmental sciences ,Cosmic dust ,COSMOS ,0306 Physical Chemistry (incl. Structural) ,Physics ,Science & Technology ,SUBMILLIMETER GALAXIES ,Astronomy and Astrophysics ,Starburst galaxie ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Galaxy ,Blank fields ,High-redshift galaxie ,Stars ,Space and Planetary Science ,[SDU]Sciences of the Universe [physics] ,LUMINOSITY FUNCTION ,Astrophysics of Galaxies (astro-ph.GA) ,Physical Sciences ,0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics ,High-redshift galaxies ,MILKY-WAY ,LARGE-MAGELLANIC-CLOUD ,Halo ,FORMATION RATE DENSITY ,INTERSTELLAR DUST - Abstract
We present a physical characterization of MMJ100026.36+021527.9 (a.k.a. ``MAMBO-9''), a dusty star-forming galaxy (DSFG) at $z=5.850\pm0.001$. This is the highest redshift unlensed DSFG (and fourth most distant overall) found to-date, and is the first source identified in a new 2mm blank-field map in the COSMOS field. Though identified in prior samples of DSFGs at 850$\mu$m-1.2mm with unknown redshift, the detection at 2mm prompted further follow-up as it indicated a much higher probability that the source was likely to sit at $z>4$. Deep observations from the Atacama Large Millimeter and submillimeter Array (ALMA) presented here confirm the redshift through the secure detection of $^{12}$CO($J\!=$6$\rightarrow$5) and p-H$_{2}$O(2$_{1,1}\!\rightarrow$2$_{0,2}$). MAMBO-9 is comprised of a pair of galaxies separated by 6kpc with corresponding star-formation rates of 590M$_\odot$yr$^{-1}$ and 220M$_\odot$yr$^{-1}$ total molecular hydrogen gas mass of (1.7$\pm$0.4)$\times10^{11}$M$_\odot$, dust mass of (1.3$\pm$0.3)$\times10^{9}$M$_\odot$ and stellar mass of (3.2$^{+1.0}_{-1.5}$)$\times10^{9}$M$_\odot$. The total halo mass, (3.3$\pm$0.8)$\times10^{12}$M$_\odot$, is predicted to exceed $>10^{15}$M$_\odot$ by $z=0$. The system is undergoing a merger-driven starburst which will increase the stellar mass of the system tenfold in $\tau_{\rm depl}=40-80$Myr, converting its large molecular gas reservoir (gas fraction of 96$^{+1}_{-2}$%) into stars. MAMBO-9 evaded firm spectroscopic identification for a decade, following a pattern that has emerged for some of the highest redshift DSFGs found. And yet, the systematic identification of unlensed DSFGs like MAMBO-9 is key to measuring the global contribution of obscured star-formation to the star-formation rate density at $z>4$, the formation of the first massive galaxies, and the formation of interstellar dust at early times ($, Comment: 24 pages, 8 figures, accepted for publication in ApJ
- Published
- 2019
- Full Text
- View/download PDF
44. The composite nature of Dust-Obscured Galaxies (DOGs) at z~2-3 in the COSMOS field: II. The AGN fraction
- Author
-
Dieter Lutz, Carolin N. Cardamone, Karín Menéndez-Delmestre, Francesca Pozzi, D. B. Sanders, Giorgio Lanzuisi, Emeric Le Floc, Mara Salvato, Kevin Schawinski, Giulia Rodighiero, Ezequiel Treister, L. Riguccini, Claudio Ricci, Stefano Marchesi, Thiago S. Gonçalves, Francesca Civano, Takamitsu Miyaji, Elisabeta Lusso, Anton M. Koekemoer, Guenther Hasinger, Hyewon Suh, Riguccini L.A., Treister E., Menendez-Delmestre K., Cardamone C., Civano F., Goncalves T.S., Hasinger G., Koekemoer A.M., Lanzuisi G., Floc'H E.L., Lusso E., Lutz D., Marchesi S., Miyaji T., Pozzi F., Ricci C., Rodighiero G., Salvato M., Sanders D., Schawinski K., Suh H., ITA, USA, FRA, DEU, and CHL
- Subjects
010504 meteorology & atmospheric sciences ,Field (physics) ,Population ,Combined use ,Flux ,FOS: Physical sciences ,Astrophysics ,01 natural sciences ,infrared: galaxies ,Luminosity ,galaxies: high-redshift ,Observatory ,0103 physical sciences ,education ,010303 astronomy & astrophysics ,0105 earth and related environmental sciences ,Physics ,education.field_of_study ,cosmology: observation ,Significant difference ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,Space and Planetary Science ,cosmology: observations ,Astrophysics of Galaxies (astro-ph.GA) - Abstract
We present the X-ray properties of 108 Dust-Obscured Galaxies (DOGs; F$_{24 \mu m}$/F$_{R} >$ 1000) in the COSMOS field, all of which detected in at least three far-infrared bands with the Herschel Observatory. Out of the entire sample, 22 are individually detected in the hard 2-8 keV X-ray band by the Chandra COSMOS Legacy survey, allowing us to classify them as AGN. Of them, 6 (27%) are Compton Thick AGN candidates with column densities N$_{H}$$>$10$^{24}$ cm$^{-2}$ while 15 are moderately obscured AGNs with 10$^{22}$ $, Comment: To be published in ApJ
- Published
- 2019
- Full Text
- View/download PDF
45. Variability-selected low-luminosity active galactic nuclei candidates in the 7 Ms Chandra Deep Field-South
- Author
-
Qiu-Sheng Gu, Yongquan Xue, Cristian Vignali, Ohad Shemmer, Fabio Vito, X. C. Zheng, Anton M. Koekemoer, D. P. Schneider, W. N. Brandt, Guang Yang, Bret D. Lehmer, N. Ding, Birong Luo, J. X. Wang, Paolo Tozzi, Maurizio Paolillo, ITA, USA, CHN, Ding, N., Luo, B., Brandt, W.N., Paolillo, M., Yang, G., Lehmer, B.D., Shemmer, O., Schneider, D.P., Tozzi, P., Xue, Y.Q., Zheng, X.C., Gu, Q.S., Koekemoer, A.M., Vignali, C., Vito, F., Wang, J.X., Brandt, W. N., Lehmer, B. D., Schneider, D. P., Xue, Y. Q., Zheng, X. C., Gu, Q. S., Koekemoer, A. M., and Wang, J. X.
- Subjects
Active galactic nucleus ,Photon ,Astrophysics::High Energy Astrophysical Phenomena ,galaxies: active ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,X-rays: general ,01 natural sciences ,Luminosity ,0103 physical sciences ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Physics ,High Energy Astrophysical Phenomena (astro-ph.HE) ,Supermassive black hole ,010308 nuclear & particles physics ,Spectral density ,Astronomy and Astrophysics ,Astronomy and Astrophysic ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,Amplitude ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,Chandra Deep Field South ,High Energy Physics::Experiment ,galaxies: nuclei ,Astrophysics - High Energy Astrophysical Phenomena ,X-rays: galaxie - Abstract
In deep X-ray surveys, active galactic nuclei (AGNs) with a broad range of luminosities have been identified. However, cosmologically distant low-luminosity AGN (LLAGN, $L_{\mathrm{X}} \lesssim 10^{42}$ erg s$^{-1}$) identification still poses a challenge due to significant contamination from host galaxies. Based on the 7 Ms Chandra Deep Field-South (CDF-S) survey, the longest timescale ($\sim 17$ years) deep X-ray survey to date, we utilize an X-ray variability selection technique to search for LLAGNs that remain unidentified among the CDF-S X-ray sources. We find 13 variable sources from 110 unclassified CDF-S X-ray sources. Except for one source which could be an ultraluminous X-ray source, the variability of the remaining 12 sources is most likely due to accreting supermassive black holes. These 12 AGN candidates have low intrinsic X-ray luminosities, with a median value of $7 \times10^{40}$ erg s$^{-1}$. They are generally not heavily obscured, with an average effective power-law photon index of 1.8. The fraction of variable AGNs in the CDF-S is independent of X-ray luminosity and is only restricted by the total number of observed net counts, confirming previous findings that X-ray variability is a near-ubiquitous property of AGNs over a wide range of luminosities. There is an anti-correlation between X-ray luminosity and variability amplitude for high-luminosity AGNs, but as the luminosity drops to $\lesssim 10^{42}$ erg s$^{-1}$, the variability amplitude no longer appears dependent on the luminosity. The entire observed luminosity-variability trend can be roughly reproduced by an empirical AGN variability model based on a broken power-law power spectral density function., Comment: 18 pages, 11 figures, accepted for publication in ApJ
- Published
- 2018
- Full Text
- View/download PDF
46. A quasar–galaxy mixing diagram: quasar spectral energy distribution shapes in the optical to near-infrared
- Author
-
Jonathan R. Trump, Brandon C. Kelly, Luis C. Ho, Giorgio Lanzuisi, Chris Impey, John D. Silverman, Knud Jahnke, Anton M. Koekemoer, Martin Elvis, Andrea Comastri, Heng Hao, Mara Salvato, Francesca Civano, Annalisa Celotti, Kevin Schawinski, Cristian Vignali, Gianni Zamorani, Andrea Merloni, Vincenzo Mainieri, C. Megan Urry, Marcella Brusa, Angela Bongiorno, Hao H., Elvis M., Bongiorno A., Zamorani G., Merloni A., Kelly B.C., Civano F., Celotti A., Ho L.C., Jahnke K., Comastri A., Trump J.R., Mainieri V., Salvato M., Brusa M., Impey C.D., Koekemoer A.M., Lanzuisi G., Vignali C., Silverman J.D., Urry C.M., and Schawinski K.
- Subjects
010504 meteorology & atmospheric sciences ,Astrophysics::High Energy Astrophysical Phenomena ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,01 natural sciences ,Luminosity ,Settore FIS/05 - Astronomia e Astrofisica ,quasars: general ,0103 physical sciences ,Astrophysics::Solar and Stellar Astrophysics ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Mixing (physics) ,0105 earth and related environmental sciences ,Physics ,surveys - galaxies: evolution ,Diagram ,Astronomy ,Astronomy and Astrophysics ,Quasar ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Galaxy ,Black hole ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,Spectral energy distribution ,galaxies: evolution ,SURVEYS - Abstract
We define a quasar-galaxy mixing diagram using the slopes of their spectral energy distributions (SEDs) from 1\mu m to 3000\AA\ and from 1\mu m to 3\mu m in the rest frame. The mixing diagram can easily distinguish among quasar-dominated, galaxy-dominated and reddening-dominated SED shapes. By studying the position of the 413 XMM selected Type 1 AGN in the wide-field "Cosmic Evolution Survey" (COSMOS) in the mixing diagram, we find that a combination of the Elvis et al. (1994, hereafter E94) quasar SED with various contributions from galaxy emission and some dust reddening is remarkably effective in describing the SED shape from 0.3-3\mu m for large ranges of redshift, luminosity, black hole mass and Eddington ratio of type 1 AGN. In particular, the location in the mixing diagram of the highest luminosity AGN is very close (within 1\sigma) to that of the E94 SED. The mixing diagram can also be used to estimate the host galaxy fraction and reddening in quasar. We also show examples of some outliers which might be AGN in different evolutionary stages compared to the majority of AGN in the quasar-host galaxy co-evolution cycle., Comment: 19 pages, 13 figures, 2 tables, accepted by MNRAS
- Published
- 2013
- Full Text
- View/download PDF
47. Characterization of star-forming dwarf galaxies at 0.1 ≲ z ≲ 0.9 in VUDS: Probing the low-mass end of the mass-metallicity relation
- Author
-
Marco Castellano, B. Garilli, Nimish P. Hathi, Daniel Schaerer, B. Ribeiro, Thierry Contini, O. Le Fevre, Brian C. Lemaux, Lucia Guaita, E. Zucca, L. A. M. Tasca, S. Bardelli, S. de Barros, Enrique Pérez-Montero, Anton M. Koekemoer, Margherita Talia, D. Maccagni, A. Calabrò, Andrea Grazian, Ricardo Amorín, Laura Pentericci, Adriano Fontana, European Research Council, Ministerio de Economía y Competitividad (España), European Commission, Istituto Nazionale di Astrofisica, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Calabrò, A., Amorín, R., Fontana, A., Pérez-Montero, E., Lemaux, B.C., Ribeiro, B., Bardelli, S., Castellano, M., Contini, T., De Barros, S., Garilli, B., Grazian, A., Guaita, L., Hathi, N.P., Koekemoer, A.M., Le Fèvre, O., MacCagni, D., Pentericci, L., Schaerer, D., Talia, M., Tasca, L.A.M., Zucca, E., Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Amorin Barbieri, Ricardo [0000-0001-5758-1000], and Apollo - University of Cambridge Repository
- Subjects
Stellar mass ,Metallicity ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Abundances [Galaxies] ,01 natural sciences ,Evolution [Galaxies] ,Galaxies: Abundances ,Dwarf [Galaxies] ,0103 physical sciences ,Galaxies: Evolution ,Astrophysics::Solar and Stellar Astrophysics ,Emission spectrum ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Dwarf galaxy ,Physics ,010308 nuclear & particles physics ,Star formation ,Galaxies: High-redshift ,Astronomy and Astrophysics ,Galaxies: Abundance ,Astronomy and Astrophysic ,Starburst [Galaxies] ,Galaxy ,Redshift ,Galaxies: Starburst ,Space and Planetary Science ,Galaxies: Dwarf ,Low Mass ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,High-redshift [Galaxies] - Abstract
Context. The study of statistically significant samples of star-forming dwarf galaxies (SFDGs) at different cosmic epochs is essential for the detailed understanding of galaxy assembly and chemical evolution. However, the main properties of this large population of galaxies at intermediate redshift are still poorly known. Aims. We present the discovery and spectrophotometric characterization of a large sample of 164 faint (i ∼ 23-25 mag) SFDGs at redshift 0.13 ≤ z ≤ 0:88 selected by the presence of bright optical emission lines in the VIMOS Ultra Deep Survey (VUDS). We investigate their integrated physical properties and ionization conditions, which are used to discuss the low-mass end of the mass-metallicity relation (MZR) and other key scaling relations. Methods. We use optical VUDS spectra in the COSMOS, VVDS-02h, and ECDF-S fields, as well as deep multi-wavelength photometry that includes HST-ACS F814W imaging, to derive stellar masses, extinction-corrected star-formation rates (SFR), and gas-phase metallicities of SFDGs. For the latter, we use the direct method and a Te-consistent approach based on the comparison of a set of observed emission lines ratios with the predictions of detailed photoionization models. Results. The VUDS SFDGs are compact (median r ∼ 1.2 kpc), low-mass (M ∼ 10-10 M) galaxies with a wide range of starformation rates (SFR(Hα) ∼ 10-10 M/yr) and morphologies. Overall, they show a broad range of subsolar metallicities (12 + log(O/H) = 7:26-8:7; 0.04 ≲ Z=Z ≲ 1). Nearly half of the sample are extreme emission-line galaxies (EELGs) characterized by high equivalent widths and emission line ratios indicative of higher excitation and ionization conditions. The MZR of SFDGs shows a flatter slope compared to previous studies of galaxies in the same mass range and redshift. We find the scatter of the MZR is partly explained in the low mass range by varying specific SFRs and gas fractions amongst the galaxies in our sample. In agreement with recent studies, we find the subclass of EELGs to be systematically oset to lower metallicity compared to SFDGs at a given stellar mass and SFR, suggesting a younger starburst phase. Compared with simple chemical evolution models we find that most SFDGs do not follow the predictions of a "closed-box" model, but those from a gas-regulating model in which gas flows are considered. While strong stellar feedback may produce large-scale outflows favoring the cessation of vigorous star formation and promoting the removal of metals, younger and more metal-poor dwarfs may have recently accreted large amounts of fresh, very metal-poor gas, that is used to fuel current star formation. © 2017 ESO., Precious and continuous support for the VUDS survey was provided by the ESO staff, particularly by the Paranal staff conducting the observations and Marina Rejkuba and the ESO user support group in Garching. We also thank J. Sanchez Almeida who has provided insightful comments to the paper, and E. Daddi for helpful suggestions. This work is supported by funding from the European Research Council Advanced Grant ERC-2010-AdG-268107-EARLY and by INAF Grants PRIN 2010, PRIN 2012 and PICS 2013. R.A. and A.F. acknowledge the FP7 SPACE project "ASTRODEEP" (Ref. No. 312725), supported by the European Commission. R.A. acknowledges the support from the ERC Advanced Grant 695671 "QUENCH". A.C., O.C., M.T. and V.S. acknowledge the grant MIUR PRIN 2010-2011. E.P.M. acknowledges support from the Spanish MINECO through grant AYA2013-47742-C4-1-P. This work is based on data products made available at the CESAM data center, Laboratoire d'Astrophysique de Marseille. This work partly uses observations obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, at the Canada-France-Hawaii Telescope (CFHT) which is operated by the National Research Council (NRC) of Canada, the Institut National des Sciences de l'Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii. This work is based in part on data products produced at TERAPIX and the Canadian Astronomy Data Centre as part of the Canada-France-Hawaii Telescope Legacy Survey, a collaborative project of NRC and CNRS.
- Published
- 2017
- Full Text
- View/download PDF
48. Detailed Shape and Evolutionary Behavior of the X-ray Luminosity Function of Active Galactic Nuclei
- Author
-
Masayuki Akiyama, Hermann Brunner, Roberto Gilli, Martin Elvis, Marcella Brusa, Giorgio Lanzuisi, Simonetta Puccetti, Andrea Comastri, Nico Cappelluti, Takamitsu Miyaji, Sotiria Fotopoulou, Anton M. Koekemoer, Andrea Merloni, Cristian Vignali, Mara Salvato, Guenther Hasinger, Richard E. Griffiths, Francesca Civano, Yoshihiro Ueda, Miyaji T., Hasinger G., Salvato M., Brusa M., Cappelluti N., Civano F., Puccetti S., Elvis M., Brunner H., Fotopoulou S., Ueda Y., Griffiths R.E., Koekemoer A.M., Akiyama M., Comastri A., Gilli R., Lanzuisi G., Merloni A., Vignali C., ITA, and USA
- Subjects
GALAXIES: MASS FUNCTION ,Active galactic nucleus ,Astrophysics::High Energy Astrophysical Phenomena ,galaxies: active ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Flattening ,Luminosity ,quasars: general ,0103 physical sciences ,GALAXIES: LUMINOSITY FUNCTION ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Photometric redshift ,Luminosity function (astronomy) ,Physics ,Number density ,010308 nuclear & particles physics ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Redshift ,X-rays: galaxies ,Orders of magnitude (time) ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) - Abstract
We construct the rest-frame 2--10 keV intrinsic X-ray luminosity function of Active Galactic Nuclei (AGNs) from a combination of X-ray surveys from the all-sky Swift BAT survey to the Chandra Deep Field-South. We use ~3200 AGNs in our analysis, which covers six orders of magnitude in flux. The inclusion of the XMM and Chandra COSMOS data has allowed us to investigate the detailed behavior of the XLF and evolution. In deriving our XLF, we take into account realistic AGN spectrum templates, absorption corrections, and probability density distributions in photometric redshift. We present an analytical expression for the overall behavior of the XLF in terms of the luminosity-dependent density evolution, smoothed two power-law expressions in 11 redshift shells, three-segment power-law expression of the number density evolution in four luminosity classes, and binned XLF. We observe a sudden flattening of the low luminosity end slope of the XLF slope at z>~0.6. Detailed structures of the AGN downsizing have been also revealed, where the number density curves have two clear breaks at all luminosity classes above log LX>43. The two break structure is suggestive of two-phase AGN evolution, consisting of major merger triggering and secular processes., 39 Pages, 9 figures. ApJ in press
- Published
- 2015
- Full Text
- View/download PDF
49. The zCOSMOS redshift survey : evolution of the light in bulges and discs since z ~ 0.8
- Author
-
Luis C. Ho, O. Le Fevre, H. J. McCracken, P. Franzetti, Anton M. Koekemoer, R. Pello, E. Zucca, A. Cappi, A. Cattaneo, Niraj Welikala, A. Iovino, K. Kovavc, Alvio Renzini, J. F. Le Borgne, R. M. Rich, M. Mignoli, B. Garilli, T. Contini, Yoshiaki Taniguchi, Graziano Coppa, Jean-Paul Kneib, Masaomi Tanaka, C. Lopez-Sanjuan, E. Perez Montero, P. Kampczyk, Vincenzo Mainieri, Andrea Cimatti, F. Lamareille, Richard Massey, Marco Scodeggio, Angela Bongiorno, Rongmon Bordoloi, Y. Peng, L. Tresse, L. A. M. Tasca, C. Knobel, S. Bardelli, Duncan Farrah, Kartik Sheth, Christian Maier, D. Vergani, Michele Moresco, O. Cucciati, S. de la Torre, K. Caputi, C. M. Carollo, M. Bolzonella, Lucia Pozzetti, G. Zamorani, C. T. Liu, D. B. Sanders, Simon J. Lilly, Luigi Guzzo, V. Le Brun, O. Ilbert, Astronomy, Tasca, L.A.M., Tresse, L., Le Fèvre, O., Ilbert, O., Lilly, S.J., Zamorani, G., López-Sanjuan, C., Ho, L.C., Bardelli, S., Cattaneo, A., Cucciati, O., Farrah, D., Iovino, A., Koekemoer, A.M., Liu, C.T., Massey, R., Renzini, A., Taniguchi, Y., Welikala, N., Zucca, E., Carollo, C.M., Contini, T., Kneib, J.-P., Mainieri, V., Scodeggio, M., Bolzonella, M., Bongiorno, A., Caputi, K., De La Torre, S., Franzetti, P., Garilli, B., Guzzo, L., Kampczyk, P., Knobel, C., Kovač, K., Lamareille, F., Le Borgne, J.-F., Le Brun, V., Maier, C., Mignoli, M., Pello, R., Peng, Y., Perez Montero, E., Rich, R.M., Tanaka, M., Vergani, D., Bordoloi, R., Cappi, A., Cimatti, A., Coppa, G., Mccracken, H.J., Moresco, M., Pozzetti, L., Sanders, D., and Sheth, K.
- Subjects
Galaxies: fundamental parameter ,FORMING GALAXY ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,MASS ,fundamental parameters. [Galaxies] ,LUMINOSITY FUNCTIONS ,galaxies: bulges ,STAR-FORMATION RATE ,Luminosity ,ADVANCED CAMERA ,bulges [Galaxies] ,Bulge ,distances and redshifts [Galaxies] ,Galaxies: distances and redshift ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Galaxy Astrophysics ,Physics ,FORMATION HISTORY ,Star formation ,Astronomy and Astrophysics ,galaxies: fundamental parameters ,HUBBLE-SPACE-TELESCOPE ,VLT DEEP SURVEY ,Astronomy and Astrophysic ,Redshift survey ,evolution [Galaxies] ,Astrophysics - Astrophysics of Galaxies ,luminosity function [Galaxies] ,Redshift ,Galaxy ,Stars ,galaxies: luminosity function ,Space and Planetary Science ,mass function ,Astrophysics of Galaxies (astro-ph.GA) ,galaxies: luminosity function, mass function ,Astrophysics::Earth and Planetary Astrophysics ,GALAXY FORMATION ,galaxies: distances and redshifts ,Irregular galaxy ,galaxies: evolution ,Galaxies: bulge ,SURVEY COSMOS - Abstract
We studied the chronology of galactic bulge and disc formation by analysing the relative contributions of these components to the B-band rest-frame luminosity density at different epochs. We present the first estimate of the evolution of the fraction of rest-frame B-band light in galactic bulges and discs since redshift z~0.8. We performed a bulge-to-disc decomposition of HST/ACS images of 3266 galaxies in the zCOSMOS-bright survey with spectroscopic redshifts in the range 0.7 < z < 0.9. We find that the fraction of B-band light in bulges and discs is $(26 \pm 4)%$ and $(74 \pm 4)%$, respectively. When compared with rest-frame B-band measurements of galaxies in the local Universe in the same mass range ($10^{9} M_{\odot}\lessapprox M \lessapprox 10^{11.5} M_{\odot}$), we find that the B-band light in discs decreases by ~30% from z~0.7-0.9 to z~0, while the light from the bulge increases by ~30% over the same period of time. We interpret this evolution as the consequence of star formation and mass assembly processes, as well as morphological transformation, which gradually shift stars formed at half the age of the Universe from star-forming late-type/irregular galaxies toearlier types and ultimately into spheroids., Letter to the Editor, 4 pages, 2 figures, accepted for publication in Astronomy and Astrophysics
- Published
- 2014
50. zCOSMOS 20k: Satellite galaxies are the main drivers of environmental effects in the galaxy population at least to z~0.7
- Author
-
Angela Bongiorno, Michele Moresco, G. Zamorani, K. Caputi, E. Pérez Montero, Anton M. Koekemoer, Daniela Vergani, Vincenzo Mainieri, Jean-Paul Kneib, P. Kampczyk, A. Iovino, F. Lamareille, J. F. Le Borgne, Laurence Tresse, John D. Silverman, S. Bardelli, Marco Scodeggio, C. Knobel, V. Presotto, E. Le Floc'h, L. de Ravel, L. A. M. Tasca, E. Zucca, Katarina Kovac, T. J. Bschorr, V. Le Brun, Micol Bolzonella, Alvio Renzini, Pascal Oesch, Yingjie Peng, Lucia Pozzetti, Herve Aussel, P. Franzetti, R. Pello, B. Garilli, O. Le Fevre, M. Mignoli, O. Cucciati, S. de la Torre, Christian Maier, Thierry Contini, C. M. Carollo, Simon J. Lilly, Masayuki Tanaka, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Kovač, K, Lilly, S.J., Knobel, C., Bschorr, T.J., Peng, Y., Carollo, C.M., Contini, T., Kneib, J.-P., Le Févre, O., Mainieri, V., Renzini, A., Scodeggio, M., Zamorani, G., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Cucciati, O., de la Torre, S., de Ravel, L., Franzetti, P., Garilli, B., Iovino, A., Kampczyk, P., Lamareille, F., Le Borgne, J.-F., Le Brun, V., Maier, C., Mignoli, M., Oesch, P., Pello, R., Perez Montero, E., Presotto, V., Silverman, J., Tanaka, M., Tasca, L., Tresse, L., Vergani, D., Zucca, E., Aussel, H., Koekemoer, A.M., Le Floc'h, E., Moresco, M., Pozzetti, L., Astronomy, Kapteyn Astronomical Institute, K., Kovac, S. J., Lilly, C., Knobel, T. J., Bschorr, Y., Peng, C. M., Carollo, T., Contini, J. P., Kneib, O., Le Fevre, V., Mainieri, A., Renzini, M., Scodeggio, G., Zamorani, S., Bardelli, M., Bolzonella, A., Bongiorno, K., Caputi, O., Cucciati, S., de la Torre, L., de Ravel, P., Franzetti, B., Garilli, A., Iovino, P., Kampczyk, F., Lamareille, J. F., Le Borgne, V., Le Brun, C., Maier, M., Mignoli, P., Oesch, R., Pello, E. P., Montero, Presotto, Valentina, J., Silverman, M., Tanaka, L., Tasca, L., Tresse, D., Vergani, E., Zucca, H., Aussel, A. M., Koekemoer, E., Le Floc'h, M., Moresco, and L., Pozzetti
- Subjects
HUBBLE SEQUENCE ,HALO MASS ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Stellar mass ,Population ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Cosmology: observation ,Hubble sequence ,symbols.namesake ,galaxies: groups: general ,0103 physical sciences ,Satellite galaxy ,statistic [galaxies] ,education ,010303 astronomy & astrophysics ,RED SEQUENCE ,evolution [galaxies] ,Astrophysics::Galaxy Astrophysics ,galaxies: statistics ,STAR-FORMATION HISTORIES ,Physics ,REDSHIFT SURVEY ,education.field_of_study ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,groups: general [galaxies] ,010308 nuclear & particles physics ,galaxies: evolution ,galaxies: star formation ,cosmology: observations ,Astronomy ,Astronomy and Astrophysics ,Redshift survey ,observations [cosmology] ,Galaxy ,Redshift ,Ram pressure ,COSMOS FIELD ,RAM PRESSURE ,Space and Planetary Science ,COLOR-DENSITY RELATION ,symbols ,DIGITAL SKY SURVEY ,STELLAR MASS FUNCTION ,star formation [galaxies] ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We explore the role of environment in the evolution of galaxies over 0.1, Comment: 22 pages, 19 figures, submitted to MNRAS
- Published
- 2013
- Full Text
- View/download PDF
Catalog
Books, media, physical & digital resources
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.