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375 results on '"Maccagni, D"'

1. Metal content of the circumgalactic medium around star-forming galaxies at z $\sim$ 2.6 as revealed by the VIMOS Ultra-Deep Survey

Author: Méndez-Hernández, H., Cassata, P., Ibar, E., Amorín, R, Aravena, M., Bardelli, S., Cucciati, O., Garilli, B., Giavalisco, M., Guaita, L., Hathi, N., Koekemoer, A., Brun, V. Le, Lemaux, B. C., Maccagni, D., Ribeiro, B., Tasca, L., Tejos, N., Thomas, R., Tresse, L., Vergani, D., Zamorani, G., Zucca, E., Méndez-Hernández, H., Cassata, P., Ibar, E., Amorín, R, Aravena, M., Bardelli, S., Cucciati, O., Garilli, B., Giavalisco, M., Guaita, L., Hathi, N., Koekemoer, A., Brun, V. Le, Lemaux, B. C., Maccagni, D., Ribeiro, B., Tasca, L., Tejos, N., Thomas, R., Tresse, L., Vergani, D., Zamorani, G., and Zucca, E.
Abstract: The circumgalactic medium (CGM) is the location where the interplay between large-scale outflows and accretion onto galaxies occurs. Metals in different ionization states flowing between the circumgalactic and intergalactic mediums are affected by large galactic outflows and low-ionization state inflowing gas. Observational studies on their spatial distribution and their relation with galaxy properties may provide important constraints on models of galaxy formation and evolution. To provide new insights into the spatial distribution of the circumgalactic of star-forming galaxies, we select a sample of 238 close pairs at $1.5 < z <4.5$ ($\langle z\rangle\sim$2.6) from the VIMOS Ultra Deep Survey. We then generate composite spectra by co-adding spectra of $background$ galaxies that provide different sight-lines across the CGM to examine the spatial distribution of the gas located around these galaxies and investigate possible correlations between the strength of the low- and high-ionization absorption features with different galaxy properties. We detect C II, Si II, Si IV and C IV) up to separations $\langle b \rangle=$ 172 kpc and 146 kpc. Our $W_{0}$ radial profiles suggest a potential redshift evolution for the CGM gas content producing these absorptions. We find a correlation between C II and C IV with star formation rate, stellar mass and trends with galaxy size estimated by the effective radius and azimuthal angle. Galaxies with high star formation rate show stronger C IV absorptions compared with star-forming galaxies with low SFR and low stellar mass. These results could be explained by stronger outflows, softer radiation fields unable to ionize high-ionization state lines or by the galactic fountain scenario where metal-rich gas ejected from previous star-formation episodes fall back to the galaxy., Comment: Accepted for publication in A&A
Published: 2022
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2. The Type II AGN-host galaxy connection: insights from the VVDS and VIPERS surveys

Author: Vietri, G., Garilli, B., Polletta, M., Bisogni, S., Cassarà, L. P., Franzetti, P., Fumana, M., Gargiulo, A., Maccagni, D., Mancini, C., Scodeggio, M., Fritz, A., Malek, K., Manzoni, G., Pollo, A., Siudek, M., Vergani, D., Zamorani, G., Zanichelli, A., Vietri, G., Garilli, B., Polletta, M., Bisogni, S., Cassarà, L. P., Franzetti, P., Fumana, M., Gargiulo, A., Maccagni, D., Mancini, C., Scodeggio, M., Fritz, A., Malek, K., Manzoni, G., Pollo, A., Siudek, M., Vergani, D., Zamorani, G., and Zanichelli, A.
Abstract: We present a study of optically-selected Type II AGN at 0.5 < z < 0.9 from the VIPERS and VVDS surveys, to investigate the connection between AGN activity and physical properties of their host galaxies. The host stellar mass is estimated through spectral energy distribution fitting with the CIGALE code, and star formation rates are derived from the [OII]$\lambda$3727 $\r{A}$ line luminosity. We find that 49% of the AGN host galaxies are on or above the main sequence (MS), 40% lie in the sub-MS locus, and 11% in the quiescent locus. Using the [OIII]$\lambda$5007 $\r{A}$ line luminosity as a proxy of the AGN power, we find that at fixed AGN power Type II AGN host galaxies show a bimodal behaviour: systems with host galaxy stellar mass <10$^{10}$ M$_{\odot}$, reside along the MS or in the starbursts locus (high-SF Type II AGN), while systems residing in massive host-galaxies (>10$^{10}$ M$_{\odot}$) show a lower level of star formation (low-SF Type II AGN). At all stellar masses, the offset from the MS is positively correlated with the AGN power. We interpret this correlation as evidence of co-evolution between the AGN and the host, possibly due to the availability of cold gas. In the most powerful AGN with host galaxies below the MS we find a hint, though weak, of asymmetry in the [OIII] line profile, likely due to outflowing gas, consistent with a scenario in which AGN feedback removes the available gas and halts the star formation in the most massive hosts., Comment: Accepted for publication in A&A
Published: 2021
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3. The Type II AGN-host galaxy connection: insights from the VVDS and VIPERS surveys

Author: Vietri, G., Garilli, B., Polletta, M., Bisogni, S., Cassarà, L. P., Franzetti, P., Fumana, M., Gargiulo, A., Maccagni, D., Mancini, C., Scodeggio, M., Fritz, A., Malek, K., Manzoni, G., Pollo, A., Siudek, M., Vergani, D., Zamorani, G., Zanichelli, A., Vietri, G., Garilli, B., Polletta, M., Bisogni, S., Cassarà, L. P., Franzetti, P., Fumana, M., Gargiulo, A., Maccagni, D., Mancini, C., Scodeggio, M., Fritz, A., Malek, K., Manzoni, G., Pollo, A., Siudek, M., Vergani, D., Zamorani, G., and Zanichelli, A.
Abstract: We present a study of optically-selected Type II AGN at 0.5 < z < 0.9 from the VIPERS and VVDS surveys, to investigate the connection between AGN activity and physical properties of their host galaxies. The host stellar mass is estimated through spectral energy distribution fitting with the CIGALE code, and star formation rates are derived from the [OII]$\lambda$3727 $\r{A}$ line luminosity. We find that 49% of the AGN host galaxies are on or above the main sequence (MS), 40% lie in the sub-MS locus, and 11% in the quiescent locus. Using the [OIII]$\lambda$5007 $\r{A}$ line luminosity as a proxy of the AGN power, we find that at fixed AGN power Type II AGN host galaxies show a bimodal behaviour: systems with host galaxy stellar mass <10$^{10}$ M$_{\odot}$, reside along the MS or in the starbursts locus (high-SF Type II AGN), while systems residing in massive host-galaxies (>10$^{10}$ M$_{\odot}$) show a lower level of star formation (low-SF Type II AGN). At all stellar masses, the offset from the MS is positively correlated with the AGN power. We interpret this correlation as evidence of co-evolution between the AGN and the host, possibly due to the availability of cold gas. In the most powerful AGN with host galaxies below the MS we find a hint, though weak, of asymmetry in the [OIII] line profile, likely due to outflowing gas, consistent with a scenario in which AGN feedback removes the available gas and halts the star formation in the most massive hosts., Comment: Accepted for publication in A&A
Published: 2021
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4. The VANDELS ESO public spectroscopic survey: final Data Release of 2087 spectra and spectroscopic measurements

Author: 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., Fevre, O. Le, 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., 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., Fevre, O. Le, 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., and Zucca, E.
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{\AA} 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)<11.7. All catalogues and spectra are accessible through the survey database (http://vandels.inaf.it) where all information can be queried interactively, and via the ESO Archive (https://www.eso.org/qi/)., Comment: 16 pages, 13 figures, accepted for publication in Astronomy & Astrophysics
Published: 2021
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5. The VANDELS ESO public spectroscopic survey:Final data release of 2087 spectra and spectroscopic measurements

Author: 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., 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., and Zucca, E.
Abstract: VANDELS is an ESO Public Spectroscopic Survey designed to build a sample of high-signal-to-noise ratio, medium-resolution spectra of galaxies at redshifts between 1 and 6.5. Here we present the final Public Data Release of the VANDELS Survey, comprising 2087 redshift measurements. We provide a detailed description of sample selection, observations, and data reduction procedures. The final catalogue reaches a target selection completeness of 40% at i(AB)=25. The high signal-to-noise ratio of the spectra (above 7 in 80% of the spectra) and the dispersion of 2.5 angstrom 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-infrared photometry and physical parameters derived through fitting the spectral energy distribution. The observed galaxy sample comprises both passive and star forming galaxies covering a stellar mass range of 8.3
Published: 2021

6. The VANDELS ESO public spectroscopic survey:Final data release of 2087 spectra and spectroscopic measurements

Author: 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., 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., and Zucca, E.
Abstract: VANDELS is an ESO Public Spectroscopic Survey designed to build a sample of high-signal-to-noise ratio, medium-resolution spectra of galaxies at redshifts between 1 and 6.5. Here we present the final Public Data Release of the VANDELS Survey, comprising 2087 redshift measurements. We provide a detailed description of sample selection, observations, and data reduction procedures. The final catalogue reaches a target selection completeness of 40% at i(AB)=25. The high signal-to-noise ratio of the spectra (above 7 in 80% of the spectra) and the dispersion of 2.5 angstrom 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-infrared photometry and physical parameters derived through fitting the spectral energy distribution. The observed galaxy sample comprises both passive and star forming galaxies covering a stellar mass range of 8.3
Published: 2021

7. The VIMOS Ultra-Deep Survey: the Ly$\alpha$ emission line morphology at $2 < z < 6$

Author: Ribeiro, B., Fèvre, O. Le, Paulino-Afonso, A., Cassata, P., Brun, V. Le, Lemaux, B. C., Maccagni, D., Pentericci, L., Thomas, R., Zamorani, G., Zucca, E., Amorín, R., Bardelli, S., Cassarà, L. P., Guaita, L., Hathi, N. P., Koekemoer, A., Schaerer, D., Talia, M., Pforr, J., Tresse, L., Fotopoulou, S., Vergani, D., Ribeiro, B., Fèvre, O. Le, Paulino-Afonso, A., Cassata, P., Brun, V. Le, Lemaux, B. C., Maccagni, D., Pentericci, L., Thomas, R., Zamorani, G., Zucca, E., Amorín, R., Bardelli, S., Cassarà, L. P., Guaita, L., Hathi, N. P., Koekemoer, A., Schaerer, D., Talia, M., Pforr, J., Tresse, L., Fotopoulou, S., and Vergani, D.
Abstract: The Lyman-$\alpha$ (Ly$\alpha$) emission line has been ubiquitously used to confirm and study high redshift galaxies. We report on the line morphology as seen in the 2D spectra from the VIMOS Ultra Deep Survey in a sample of 914 Ly$\alpha$ emitters from a parent sample of 4192 star-forming galaxies at $2
Published: 2020

8. The VIMOS Ultra Deep Survey: The reversal of the star-formation rate $-$ density relation at $2 < z < 5$

Author: Lemaux, B. C., Cucciati, O., Fèvre, O. Le, Zamorani, G., Lubin, L. M., Hathi, N., Ilbert, O., Pelliccia, D., Amorín, R., Bardelli, S., Cassata, P., Gal, R. R., Garilli, B., Guaita, L., Giavalisco, M., Hung, D., Koekemoer, A., Maccagni, D., Pentericci, L., Ribeiro, B., Schaerer, D., Shah, E., Shen, L., Staab, P., Talia, M., Thomas, R., Tomczak, A. R., Tresse, L., Vanzella, E., Vergani, D., Zucca, E., Lemaux, B. C., Cucciati, O., Fèvre, O. Le, Zamorani, G., Lubin, L. M., Hathi, N., Ilbert, O., Pelliccia, D., Amorín, R., Bardelli, S., Cassata, P., Gal, R. R., Garilli, B., Guaita, L., Giavalisco, M., Hung, D., Koekemoer, A., Maccagni, D., Pentericci, L., Ribeiro, B., Schaerer, D., Shah, E., Shen, L., Staab, P., Talia, M., Thomas, R., Tomczak, A. R., Tresse, L., Vanzella, E., Vergani, D., and Zucca, E.
Abstract: Utilizing spectroscopic observations taken for the VIMOS Ultra-Deep Survey (VUDS), new observations from Keck/DEIMOS, and publicly available observations of large samples of star-forming galaxies, we report here on the relationship between the star formation rate (SFR) and the local environment ($\delta_{gal}$) of galaxies in the early universe ($2
Published: 2020
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9. The VIMOS Ultra-Deep Survey: the Ly$\alpha$ emission line morphology at $2 < z < 6$

Author: Ribeiro, B., Fèvre, O. Le, Paulino-Afonso, A., Cassata, P., Brun, V. Le, Lemaux, B. C., Maccagni, D., Pentericci, L., Thomas, R., Zamorani, G., Zucca, E., Amorín, R., Bardelli, S., Cassarà, L. P., Guaita, L., Hathi, N. P., Koekemoer, A., Schaerer, D., Talia, M., Pforr, J., Tresse, L., Fotopoulou, S., Vergani, D., Ribeiro, B., Fèvre, O. Le, Paulino-Afonso, A., Cassata, P., Brun, V. Le, Lemaux, B. C., Maccagni, D., Pentericci, L., Thomas, R., Zamorani, G., Zucca, E., Amorín, R., Bardelli, S., Cassarà, L. P., Guaita, L., Hathi, N. P., Koekemoer, A., Schaerer, D., Talia, M., Pforr, J., Tresse, L., Fotopoulou, S., and Vergani, D.
Abstract: The Lyman-$\alpha$ (Ly$\alpha$) emission line has been ubiquitously used to confirm and study high redshift galaxies. We report on the line morphology as seen in the 2D spectra from the VIMOS Ultra Deep Survey in a sample of 914 Ly$\alpha$ emitters from a parent sample of 4192 star-forming galaxies at $2
Published: 2020

10. The most massive, passive, and oldest galaxies at 0.5 < z < 2.1: Downsizing signature from galaxies selected from MgUV index

Author: Thomas, R., Fèvre, O. Le, Zamorani, G., Lemaux, B. C., Hibon, P., Koekemoer, A., Hathi, N., Maccagni, D., Cassata, P., Cassarà, L. P., Bardelli, S., Talia, M., Zucca, E., Thomas, R., Fèvre, O. Le, Zamorani, G., Lemaux, B. C., Hibon, P., Koekemoer, A., Hathi, N., Maccagni, D., Cassata, P., Cassarà, L. P., Bardelli, S., Talia, M., and Zucca, E.
Abstract: Aims. We seek is to identify old and massive galaxies at 0.5
Published: 2019
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11. The VIMOS Public Extragalactic Redshift Survey (VIPERS) -- Environment-size relation of massive passive galaxies at 0.5 < z < 0.8

Author: Gargiulo, A., Cucciati, O., Garilli, B., Scodeggio, M., Bolzonella, M., Zamorani, G., De Lucia, G., Krywult, J., Guzzo, L., Granett, B. R., de la Torre, S., Abbas, U., Adami, C., Arnouts, S., Bottini, D., Cappi, A., Franzetti, P., Fritz, A., Haines, C., Hawken, A. J., Iovino, A., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Małek, K., Marulli, F., Moutard, T., Polletta, M., Pollo, A., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Bel, J., Branchini, E., Coupon, J., Ilbert, O., Moscardini, L., Peacock, J. A., Gargiulo, A., Cucciati, O., Garilli, B., Scodeggio, M., Bolzonella, M., Zamorani, G., De Lucia, G., Krywult, J., Guzzo, L., Granett, B. R., de la Torre, S., Abbas, U., Adami, C., Arnouts, S., Bottini, D., Cappi, A., Franzetti, P., Fritz, A., Haines, C., Hawken, A. J., Iovino, A., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Małek, K., Marulli, F., Moutard, T., Polletta, M., Pollo, A., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Bel, J., Branchini, E., Coupon, J., Ilbert, O., Moscardini, L., and Peacock, J. A.
Abstract: We use the statistics of the VIPERS survey to investigate the relation between the surface mean stellar mass density Sigma=Mstar/(2*pi*Re^2) of massive passive galaxies (MPGs, Mstar>10^11 Msun) and their environment in the redshift range 0.52*10^11 Msun, we find an excess of MPGs with low Sigma and a deficit of high-Sigma MPGs in the densest regions wrt other environments. We interpret this result as due to the migration of some high-Sigma MPGs (<1% of the total population of MPGs) into low-Sigma MPGs, probably through mergers or cannibalism of small satellites. In summary, our results imply that the accretion of satellite galaxies has a marginal role in the mass-assembly history of most MPGs. We have previously found that the number density of VIPERS massive star-forming galaxies (MSFGs) declines rapidily from z=0.8 to z=0.5, which mirrors the rapid increase in the number density of MPGs. This indicates that the MSFGs at z>0.8 migrate to the MPG population. Here, we investigate the Sigma-delta relation of MSFGs at z>0.8 and find that it is consistent within 1 sigma with that of low-Sigma MPGs at z<0.8. Thus, the results of this and our previous paper show that MSFGs at z>0.8 are consistent in terms of number and environment with being the progenitors of low-Sigma MPGs at z<0.8., Comment: 12 pages, accepted for publication in A&A
Published: 2019
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12. The VANDELS survey: the role of ISM and galaxy physical properties on the escape of Ly{\alpha} emission in z $\sim$ 3.5 star-forming galaxies

Author: Marchi, F., Pentericci, L., Guaita, L., Talia, M., Castellano, M., Hathi, N., Schaerer, D., Amorin, R., Carnall, A. C., Charlot, S., Chevallard, J., Cullen, F., Finkelstein, S. L., Fontana, A., Fontanot, F., Garilli, B., Hibon, P., Koekemoer, A. M., Maccagni, D., McLure, R. J., Papovich, C., Pozzetti, L., Saxena, A., Marchi, F., Pentericci, L., Guaita, L., Talia, M., Castellano, M., Hathi, N., Schaerer, D., Amorin, R., Carnall, A. C., Charlot, S., Chevallard, J., Cullen, F., Finkelstein, S. L., Fontana, A., Fontanot, F., Garilli, B., Hibon, P., Koekemoer, A. M., Maccagni, D., McLure, R. J., Papovich, C., Pozzetti, L., and Saxena, A.
Abstract: We investigate the physical properties of a sample of 52 Ly{\alpha} emitting galaxies in the VANDELS survey, with particular focus on the role of kinematics and neutral hydrogen column density in the escape and spatial distribution of Ly{\alpha} photons. For these galaxies, we derive different physical properties and characterize the Ly{\alpha} emission in terms of kinematics, EW, FWHM and spatial extension and then estimate the velocity of the neutral outflowing gas. We reproduce some of the well known correlations between Ly{\alpha} EW and stellar mass, dust extinction and UV \b{eta} slope, in the sense that the emission line appears brighter in lower mass, less dusty and bluer galaxies. We do not find any correlation with the SED-derived star formation rate, while we find that galaxies with brighter Ly{\alpha} tend to be more compact both in UV and in Ly{\alpha}. Our data reveal a new interesting correlation between the Ly{\alpha} velocity and the offset of the inter-stellar absorption lines with respect to the systemic redshift, in the sense that galaxies with larger inter-stellar medium (ISM) out-flow velocities show smaller Ly{\alpha} velocity shifts. We interpret this relation in the context of the shell-model scenario, where the velocity of the ISM and the HI column density contribute together in determining the Ly{\alpha} kinematics. In support to our interpretation, we observe that galaxies with high HI column densities have much more extended Ly{\alpha} spatial profiles, a sign of increased scattering. However, we do not find any evidence that the HI column density is related to any other physical properties of the galaxies, although this might be due in part to the limited range of parameters that our sample spans., Comment: submitted to A&A
Published: 2019
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13. The UV and Ly$\alpha$ Luminosity Functions of galaxies and the Star Formation Rate Density at the end of HI reionization from the VIMOS Ultra-Deep Survey (VUDS)

Author: Khusanova, Y., Fèvre, O. Le, Cassata, P., Cucciati, O., Lemaux, B. C., Tasca, L. A. M., Thomas, R., Garilli, B., Brun, V. Le, Maccagni, D., Pentericci, L., Zamorani, G., Amorín, R., Bardelli, S., Castellano, M., Cassarà, 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., Zucca, E., Khusanova, Y., Fèvre, O. Le, Cassata, P., Cucciati, O., Lemaux, B. C., Tasca, L. A. M., Thomas, R., Garilli, B., Brun, V. Le, Maccagni, D., Pentericci, L., Zamorani, G., Amorín, R., Bardelli, S., Castellano, M., Cassarà, 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.
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
Published: 2019
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14. The VANDELS survey: the role of ISM and galaxy physical properties on the escape of Ly{\alpha} emission in z $\sim$ 3.5 star-forming galaxies

Author: Marchi, F., Pentericci, L., Guaita, L., Talia, M., Castellano, M., Hathi, N., Schaerer, D., Amorin, R., Carnall, A. C., Charlot, S., Chevallard, J., Cullen, F., Finkelstein, S. L., Fontana, A., Fontanot, F., Garilli, B., Hibon, P., Koekemoer, A. M., Maccagni, D., McLure, R. J., Papovich, C., Pozzetti, L., Saxena, A., Marchi, F., Pentericci, L., Guaita, L., Talia, M., Castellano, M., Hathi, N., Schaerer, D., Amorin, R., Carnall, A. C., Charlot, S., Chevallard, J., Cullen, F., Finkelstein, S. L., Fontana, A., Fontanot, F., Garilli, B., Hibon, P., Koekemoer, A. M., Maccagni, D., McLure, R. J., Papovich, C., Pozzetti, L., and Saxena, A.
Abstract: We investigate the physical properties of a sample of 52 Ly{\alpha} emitting galaxies in the VANDELS survey, with particular focus on the role of kinematics and neutral hydrogen column density in the escape and spatial distribution of Ly{\alpha} photons. For these galaxies, we derive different physical properties and characterize the Ly{\alpha} emission in terms of kinematics, EW, FWHM and spatial extension and then estimate the velocity of the neutral outflowing gas. We reproduce some of the well known correlations between Ly{\alpha} EW and stellar mass, dust extinction and UV \b{eta} slope, in the sense that the emission line appears brighter in lower mass, less dusty and bluer galaxies. We do not find any correlation with the SED-derived star formation rate, while we find that galaxies with brighter Ly{\alpha} tend to be more compact both in UV and in Ly{\alpha}. Our data reveal a new interesting correlation between the Ly{\alpha} velocity and the offset of the inter-stellar absorption lines with respect to the systemic redshift, in the sense that galaxies with larger inter-stellar medium (ISM) out-flow velocities show smaller Ly{\alpha} velocity shifts. We interpret this relation in the context of the shell-model scenario, where the velocity of the ISM and the HI column density contribute together in determining the Ly{\alpha} kinematics. In support to our interpretation, we observe that galaxies with high HI column densities have much more extended Ly{\alpha} spatial profiles, a sign of increased scattering. However, we do not find any evidence that the HI column density is related to any other physical properties of the galaxies, although this might be due in part to the limited range of parameters that our sample spans., Comment: submitted to A&A
Published: 2019
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15. The UV and Ly$\alpha$ Luminosity Functions of galaxies and the Star Formation Rate Density at the end of HI reionization from the VIMOS Ultra-Deep Survey (VUDS)

Author: Khusanova, Y., Fèvre, O. Le, Cassata, P., Cucciati, O., Lemaux, B. C., Tasca, L. A. M., Thomas, R., Garilli, B., Brun, V. Le, Maccagni, D., Pentericci, L., Zamorani, G., Amorín, R., Bardelli, S., Castellano, M., Cassarà, 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., Zucca, E., Khusanova, Y., Fèvre, O. Le, Cassata, P., Cucciati, O., Lemaux, B. C., Tasca, L. A. M., Thomas, R., Garilli, B., Brun, V. Le, Maccagni, D., Pentericci, L., Zamorani, G., Amorín, R., Bardelli, S., Castellano, M., Cassarà, 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.
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
Published: 2019
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16. The most massive, passive, and oldest galaxies at 0.5 < z < 2.1: Downsizing signature from galaxies selected from MgUV index

Author: Thomas, R., Fèvre, O. Le, Zamorani, G., Lemaux, B. C., Hibon, P., Koekemoer, A., Hathi, N., Maccagni, D., Cassata, P., Cassarà, L. P., Bardelli, S., Talia, M., Zucca, E., Thomas, R., Fèvre, O. Le, Zamorani, G., Lemaux, B. C., Hibon, P., Koekemoer, A., Hathi, N., Maccagni, D., Cassata, P., Cassarà, L. P., Bardelli, S., Talia, M., and Zucca, E.
Abstract: Aims. We seek is to identify old and massive galaxies at 0.5
Published: 2019
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17. The VIMOS Public Extragalactic Redshift Survey (VIPERS) -- Environment-size relation of massive passive galaxies at 0.5 < z < 0.8

Author: Gargiulo, A., Cucciati, O., Garilli, B., Scodeggio, M., Bolzonella, M., Zamorani, G., De Lucia, G., Krywult, J., Guzzo, L., Granett, B. R., de la Torre, S., Abbas, U., Adami, C., Arnouts, S., Bottini, D., Cappi, A., Franzetti, P., Fritz, A., Haines, C., Hawken, A. J., Iovino, A., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Małek, K., Marulli, F., Moutard, T., Polletta, M., Pollo, A., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Bel, J., Branchini, E., Coupon, J., Ilbert, O., Moscardini, L., Peacock, J. A., Gargiulo, A., Cucciati, O., Garilli, B., Scodeggio, M., Bolzonella, M., Zamorani, G., De Lucia, G., Krywult, J., Guzzo, L., Granett, B. R., de la Torre, S., Abbas, U., Adami, C., Arnouts, S., Bottini, D., Cappi, A., Franzetti, P., Fritz, A., Haines, C., Hawken, A. J., Iovino, A., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Małek, K., Marulli, F., Moutard, T., Polletta, M., Pollo, A., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Bel, J., Branchini, E., Coupon, J., Ilbert, O., Moscardini, L., and Peacock, J. A.
Abstract: We use the statistics of the VIPERS survey to investigate the relation between the surface mean stellar mass density Sigma=Mstar/(2*pi*Re^2) of massive passive galaxies (MPGs, Mstar>10^11 Msun) and their environment in the redshift range 0.52*10^11 Msun, we find an excess of MPGs with low Sigma and a deficit of high-Sigma MPGs in the densest regions wrt other environments. We interpret this result as due to the migration of some high-Sigma MPGs (<1% of the total population of MPGs) into low-Sigma MPGs, probably through mergers or cannibalism of small satellites. In summary, our results imply that the accretion of satellite galaxies has a marginal role in the mass-assembly history of most MPGs. We have previously found that the number density of VIPERS massive star-forming galaxies (MSFGs) declines rapidily from z=0.8 to z=0.5, which mirrors the rapid increase in the number density of MPGs. This indicates that the MSFGs at z>0.8 migrate to the MPG population. Here, we investigate the Sigma-delta relation of MSFGs at z>0.8 and find that it is consistent within 1 sigma with that of low-Sigma MPGs at z<0.8. Thus, the results of this and our previous paper show that MSFGs at z>0.8 are consistent in terms of number and environment with being the progenitors of low-Sigma MPGs at z<0.8., Comment: 12 pages, accepted for publication in A&A
Published: 2019
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18. The VIMOS Public Extragalactic Redshift Survey (VIPERS). The complexity of galaxy populations at 0.4< z<1.3 revealed with unsupervised machine-learning algorithms

Author: Siudek, M., Małek, K., Pollo, A., Krakowski, T., Iovino, A., Scodeggio, M., Moutard, T., Zamorani, G., Guzzo, L., Garilli, B., Granett, B. R., Bolzonella, M., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Marulli, F., Polletta, M., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., De Lucia, G., Ilbert, O., Haines, C. P., Moscardini, L., Takeuchi, T. T., Siudek, M., Małek, K., Pollo, A., Krakowski, T., Iovino, A., Scodeggio, M., Moutard, T., Zamorani, G., Guzzo, L., Garilli, B., Granett, B. R., Bolzonella, M., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Marulli, F., Polletta, M., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., De Lucia, G., Ilbert, O., Haines, C. P., Moscardini, L., and Takeuchi, T. T.
Abstract: Various galaxy classification schemes have been developed so far to constrain the main physical processes regulating evolution of different galaxy types. In the era of a deluge of astrophysical information and recent progress in machine learning, a new approach to galaxy classification becomes imperative. We employ a Fisher Expectation-Maximization unsupervised algorithm working in a parameter space of 12 rest-frame magnitudes and spectroscopic redshift. The model (DBk) and the number of classes (12) were established based on the joint analysis of standard statistical criteria and confirmed by the analysis of the galaxy distribution with respect to a number of classes and their properties. This new approach allows us to classify galaxies based just on their redshifts and UV-NIR spectral energy distributions. The FEM unsupervised algorithm has automatically distinguished 12 classes: 11 classes of VIPERS galaxies and an additional class of broad-line AGNs. After a first broad division into blue, green and red categories we obtained a further sub-division into three red, three green, and five blue galaxy classes. The FEM classes follow the galaxy sequence from the earliest to the latest types that is reflected in their colours (which are constructed from rest-frame magnitudes used in classification procedure) but also their morphological, physical, and spectroscopic properties (not included in the classification scheme). We demonstrate that the members of each class share similar physical and spectral properties. In particular, we are able to find three different classes of red passive galaxy populations. Thus, we demonstrate the potential of an unsupervised approach to galaxy classification and we retrieve the complexity of galaxy populations at z~0.7, a task that usual simpler colour-based approaches cannot fulfil., Comment: published in A&A, 27 pages, 10 figures, 4 appendixes. Please contact Malgorzata Siudek (msiudek@ifae.es) if you are interested in the catalogue
Published: 2018
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19. The progeny of a Cosmic Titan: a massive multi-component proto-supercluster in formation at z=2.45 in VUDS

Author: Cucciati, O., Lemaux, B. C., Zamorani, G., Fevre, O. Le, Tasca, L. A. M., Hathi, N. P., Lee, K-G., Bardelli, S., Cassata, P., Garilli, B., Brun, V. Le, Maccagni, D., Pentericci, L., Thomas, R., Vanzella, E., Zucca, E., Lubin, L. M., Amorin, R., Cassara', L. P., Cimatti, A., Talia, M., Vergani, D., Koekemoer, A., Pforr, J., Salvato, M., Cucciati, O., Lemaux, B. C., Zamorani, G., Fevre, O. Le, Tasca, L. A. M., Hathi, N. P., Lee, K-G., Bardelli, S., Cassata, P., Garilli, B., Brun, V. Le, Maccagni, D., Pentericci, L., Thomas, R., Vanzella, E., Zucca, E., Lubin, L. M., Amorin, R., Cassara', L. P., Cimatti, A., Talia, M., Vergani, D., Koekemoer, A., Pforr, J., and Salvato, M.
Abstract: [Abridged] We unveil the complex shape of a proto-supercluster at z~2.45 in the COSMOS field using the spectroscopic redshifts of the VIMOS Ultra-Deep Survey (VUDS), complemented by the zCOSMOS-Deep sample and high-quality photometric redshifts. The method relies on a 2D Voronoi tessellation in overlapping redshift slices that is converted into a 3D density field. The galaxy distribution is constructed using a statistical treatment of spectroscopic and photometric redshifts. We identify a proto-supercluster, dubbed "Hyperion" for its immense size and mass, which extends over a volume of ~60x60x150 comoving Mpc^3 and has an estimated total mass of ~4.8x 10^15 M_sun. This immensely complex structure contains at least 7 density peaks within 2.4 < z < 2.5, connected by filaments. Based on the peaks average matter density, we estimate their total mass, M_tot, and find a range of masses from ~0.1x10^14 M_sun to ~2.7x10^14 M_sun. By using spectroscopic members of each peak, we obtain the velocity dispersion of the galaxies in the peaks, and then their virial mass M_vir (under the strong assumption that they are virialised). The agreement between M_vir and M_tot is surprisingly good, considering that almost all the peaks are probably not yet virialised. According to the spherical collapse model, the peaks have already started or are about to start collapsing, and they are all predicted to be virialised by redshift z~0.8-1.6. We finally perform a careful comparison with the literature, given that smaller components of this proto-supercluster had previously been identified using heterogeneous galaxy samples. With VUDS, we obtain a panoramic view of this large structure, that encompasses, connects, and considerably expands in a homogeneous way on all previous detections of the various sub-components. This provides us the unique possibility to study a rich supercluster in formation., Comment: 22 pages, 13 figures, accepted to be published in A&A, very minor corrections after language editing
Published: 2018
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20. The VANDELS ESO public spectroscopic survey: observations and first data release

Author: Pentericci, L., Garilli, R. J. McLure B., Cucciati, O., Franzetti, P., Iovino, A., Amorin, R., Bolzonella, M., Bongiorno, A., Carnall, A. C., Castellano, M., Cimatti, A., Cirasuolo, M., Cullen, F., DeBarros, S., Dunlop, J. S., Elbaz, D., Finkelstein, S., Fontana, A., Fontanot, F., Fumana, M., Gargiulo, A., Guaita, L., Hartley, W., Jarvis, M., Juneau, S., Karman, W., Maccagni, D., Marchi, F., Marmol-Queralto, E., Nandra, K., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., Balestra, I., Bardelli, S., Bell, E. F., Bourne, N., Bowler, R. A. A., Brusa, M., Buitrago, F., Caputi, C., Cassata, P., Charlot, S., Citro, A., Cresci, G., Cristiani, S., Curtis-Lake, E., Dickinson, M., Faber, S. M., Fazio, 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., Fèvre, O. Le, Lotz, J., Mannucci, F., Maltby, D., Matsuoka, K., McLeod, D., Mendez-Hernandez, H., Mendez-Abreu, J., Mignoli, M., Moresco, M., Mortlock, A., Nonino, M., Pannella, M., Papovich, C., Popesso, P., Rosario, D. J., Rosati, P., Salvato, M., Santini, P., Schaerer, D., Schreiber, C., Stark, D., Tasca, L. A. M., Thomas, R., Treu, T., Vanzella, E., Wild, V., Williams, C., Zamorani, G., Zucca, E., Pentericci, L., Garilli, R. J. McLure B., Cucciati, O., Franzetti, P., Iovino, A., Amorin, R., Bolzonella, M., Bongiorno, A., Carnall, A. C., Castellano, M., Cimatti, A., Cirasuolo, M., Cullen, F., DeBarros, S., Dunlop, J. S., Elbaz, D., Finkelstein, S., Fontana, A., Fontanot, F., Fumana, M., Gargiulo, A., Guaita, L., Hartley, W., Jarvis, M., Juneau, S., Karman, W., Maccagni, D., Marchi, F., Marmol-Queralto, E., Nandra, K., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., Balestra, I., Bardelli, S., Bell, E. F., Bourne, N., Bowler, R. A. A., Brusa, M., Buitrago, F., Caputi, C., Cassata, P., Charlot, S., Citro, A., Cresci, G., Cristiani, S., Curtis-Lake, E., Dickinson, M., Faber, S. M., Fazio, 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., Fèvre, O. Le, Lotz, J., Mannucci, F., Maltby, D., Matsuoka, K., McLeod, D., Mendez-Hernandez, H., Mendez-Abreu, J., Mignoli, M., Moresco, M., Mortlock, A., Nonino, M., Pannella, M., Papovich, C., Popesso, P., Rosario, D. J., Rosati, P., Salvato, M., Santini, P., Schaerer, D., Schreiber, C., Stark, D., Tasca, L. A. M., Thomas, R., Treu, T., Vanzella, E., Wild, V., Williams, C., Zamorani, G., and Zucca, E.
Abstract: This paper describes the observations and the first data release (DR1) of the ESO public spectroscopic survey "VANDELS, a deep VIMOS survey of the CANDELS CDFS and UDS fields". VANDELS' main targets are star-forming galaxies at 2.4
Published: 2018
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21. The VIMOS Public Extragalactic Redshift Survey (VIPERS). Unsupervised classification with photometric redshifts: a method to accurately classify large galaxy samples without spectroscopic information

Author: Siudek, M., Małek, K., Pollo, A., Granett, B. R., Scodeggio, M., Moutard, T., Iovino, A., Guzzo, L., Garilli, B., Bolzonella, M., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Marulli, F., Polletta, M., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., De Lucia, G., Ilbert, O., Moscardini, L., Zamorani, G., Takeuchi, T. T., Siudek, M., Małek, K., Pollo, A., Granett, B. R., Scodeggio, M., Moutard, T., Iovino, A., Guzzo, L., Garilli, B., Bolzonella, M., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Marulli, F., Polletta, M., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., De Lucia, G., Ilbert, O., Moscardini, L., Zamorani, G., and Takeuchi, T. T.
Abstract: Techniques to classify galaxies solely based on photometry will be necessary for future large cosmology missions, such as Euclid or LSST. However, the precision of classification is always lower in photometric surveys and can be systematically biased with respect to classifications based upon spectroscopic data. We verified how precisely the detailed classification scheme introduced by Siudek et al. (2018, hereafter: S1) for galaxies at z~0.7 could be reproduced if only photometric data are available. We applied the Fisher Expectation-Maximization (FEM) unsupervised clustering algorithm to 54,293 VIPERS galaxies working in a parameter space of reliable photometric redshifts and 12 corresponding rest-frame magnitudes. The FEM algorithm distinguishes four main groups: (1) red, (2) green, (3) blue, and (4) outliers. Each group is further divided into 3, 3, 4, and 2 subclasses, respectively. The accuracy of reproducing galaxy classes using spectroscopic data is high: 92%, 84%, 96% for red, green, and blue classes, respectively, except for dusty star-forming galaxies. The presented verification of the photometric classification demonstrates that large photometric samples can be used to distinguish different galaxy classes at z > 0.5 with an accuracy provided so far only by spectroscopic data except for particular galaxy classes., Comment: the letter submitted to MNRAS, 6 pages, 4 figures. Please contact Malgorzata Siudek (msiudek@ifae.es) if you are interested in the catalogue
Published: 2018

22. 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., Marmol-Queralto, E., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., 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., Fevre, O. Le, Lotz, J. M., Mannucci, F., Maltby, D. 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., Zucca, E., 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., Marmol-Queralto, E., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., 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., Fevre, O. Le, Lotz, J. M., Mannucci, F., Maltby, D. 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.
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 ultra-deep optical (0.48 < lambda < 1.0 micron) spectroscopy of ~2100 galaxies within the redshift interval 1.0 < z < 7.0, over a total area of ~0.2 sq. degrees centred on the CANDELS UDS and CDFS fields. Based on accurate photometric redshift pre-selection, 85% 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 < t_int < 80 hours), 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 multi-wavelength 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., Comment: 19 pages, 9 figures, accepted for publication in MNRAS
Published: 2018
Full Text: View/download PDF

23. The progeny of a Cosmic Titan: a massive multi-component proto-supercluster in formation at z=2.45 in VUDS

Author: Cucciati, O., Lemaux, B. C., Zamorani, G., Fevre, O. Le, Tasca, L. A. M., Hathi, N. P., Lee, K-G., Bardelli, S., Cassata, P., Garilli, B., Brun, V. Le, Maccagni, D., Pentericci, L., Thomas, R., Vanzella, E., Zucca, E., Lubin, L. M., Amorin, R., Cassara', L. P., Cimatti, A., Talia, M., Vergani, D., Koekemoer, A., Pforr, J., Salvato, M., Cucciati, O., Lemaux, B. C., Zamorani, G., Fevre, O. Le, Tasca, L. A. M., Hathi, N. P., Lee, K-G., Bardelli, S., Cassata, P., Garilli, B., Brun, V. Le, Maccagni, D., Pentericci, L., Thomas, R., Vanzella, E., Zucca, E., Lubin, L. M., Amorin, R., Cassara', L. P., Cimatti, A., Talia, M., Vergani, D., Koekemoer, A., Pforr, J., and Salvato, M.
Abstract: [Abridged] We unveil the complex shape of a proto-supercluster at z~2.45 in the COSMOS field using the spectroscopic redshifts of the VIMOS Ultra-Deep Survey (VUDS), complemented by the zCOSMOS-Deep sample and high-quality photometric redshifts. The method relies on a 2D Voronoi tessellation in overlapping redshift slices that is converted into a 3D density field. The galaxy distribution is constructed using a statistical treatment of spectroscopic and photometric redshifts. We identify a proto-supercluster, dubbed "Hyperion" for its immense size and mass, which extends over a volume of ~60x60x150 comoving Mpc^3 and has an estimated total mass of ~4.8x 10^15 M_sun. This immensely complex structure contains at least 7 density peaks within 2.4 < z < 2.5, connected by filaments. Based on the peaks average matter density, we estimate their total mass, M_tot, and find a range of masses from ~0.1x10^14 M_sun to ~2.7x10^14 M_sun. By using spectroscopic members of each peak, we obtain the velocity dispersion of the galaxies in the peaks, and then their virial mass M_vir (under the strong assumption that they are virialised). The agreement between M_vir and M_tot is surprisingly good, considering that almost all the peaks are probably not yet virialised. According to the spherical collapse model, the peaks have already started or are about to start collapsing, and they are all predicted to be virialised by redshift z~0.8-1.6. We finally perform a careful comparison with the literature, given that smaller components of this proto-supercluster had previously been identified using heterogeneous galaxy samples. With VUDS, we obtain a panoramic view of this large structure, that encompasses, connects, and considerably expands in a homogeneous way on all previous detections of the various sub-components. This provides us the unique possibility to study a rich supercluster in formation., Comment: 22 pages, 13 figures, accepted to be published in A&A, very minor corrections after language editing
Published: 2018
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24. The VIMOS Public Extragalactic Redshift Survey (VIPERS). The complexity of galaxy populations at 0.4< z<1.3 revealed with unsupervised machine-learning algorithms

Author: Siudek, M., Małek, K., Pollo, A., Krakowski, T., Iovino, A., Scodeggio, M., Moutard, T., Zamorani, G., Guzzo, L., Garilli, B., Granett, B. R., Bolzonella, M., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Marulli, F., Polletta, M., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., De Lucia, G., Ilbert, O., Haines, C. P., Moscardini, L., Takeuchi, T. T., Siudek, M., Małek, K., Pollo, A., Krakowski, T., Iovino, A., Scodeggio, M., Moutard, T., Zamorani, G., Guzzo, L., Garilli, B., Granett, B. R., Bolzonella, M., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Marulli, F., Polletta, M., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., De Lucia, G., Ilbert, O., Haines, C. P., Moscardini, L., and Takeuchi, T. T.
Abstract: Various galaxy classification schemes have been developed so far to constrain the main physical processes regulating evolution of different galaxy types. In the era of a deluge of astrophysical information and recent progress in machine learning, a new approach to galaxy classification becomes imperative. We employ a Fisher Expectation-Maximization unsupervised algorithm working in a parameter space of 12 rest-frame magnitudes and spectroscopic redshift. The model (DBk) and the number of classes (12) were established based on the joint analysis of standard statistical criteria and confirmed by the analysis of the galaxy distribution with respect to a number of classes and their properties. This new approach allows us to classify galaxies based just on their redshifts and UV-NIR spectral energy distributions. The FEM unsupervised algorithm has automatically distinguished 12 classes: 11 classes of VIPERS galaxies and an additional class of broad-line AGNs. After a first broad division into blue, green and red categories we obtained a further sub-division into three red, three green, and five blue galaxy classes. The FEM classes follow the galaxy sequence from the earliest to the latest types that is reflected in their colours (which are constructed from rest-frame magnitudes used in classification procedure) but also their morphological, physical, and spectroscopic properties (not included in the classification scheme). We demonstrate that the members of each class share similar physical and spectral properties. In particular, we are able to find three different classes of red passive galaxy populations. Thus, we demonstrate the potential of an unsupervised approach to galaxy classification and we retrieve the complexity of galaxy populations at z~0.7, a task that usual simpler colour-based approaches cannot fulfil., Comment: published in A&A, 27 pages, 10 figures, 4 appendixes. Please contact Malgorzata Siudek (msiudek@ifae.es) if you are interested in the catalogue
Published: 2018
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25. The VIMOS Public Extragalactic Redshift Survey (VIPERS). Unsupervised classification with photometric redshifts: a method to accurately classify large galaxy samples without spectroscopic information

Author: Siudek, M., Małek, K., Pollo, A., Granett, B. R., Scodeggio, M., Moutard, T., Iovino, A., Guzzo, L., Garilli, B., Bolzonella, M., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Marulli, F., Polletta, M., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., De Lucia, G., Ilbert, O., Moscardini, L., Zamorani, G., Takeuchi, T. T., Siudek, M., Małek, K., Pollo, A., Granett, B. R., Scodeggio, M., Moutard, T., Iovino, A., Guzzo, L., Garilli, B., Bolzonella, M., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Marulli, F., Polletta, M., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., De Lucia, G., Ilbert, O., Moscardini, L., Zamorani, G., and Takeuchi, T. T.
Abstract: Techniques to classify galaxies solely based on photometry will be necessary for future large cosmology missions, such as Euclid or LSST. However, the precision of classification is always lower in photometric surveys and can be systematically biased with respect to classifications based upon spectroscopic data. We verified how precisely the detailed classification scheme introduced by Siudek et al. (2018, hereafter: S1) for galaxies at z~0.7 could be reproduced if only photometric data are available. We applied the Fisher Expectation-Maximization (FEM) unsupervised clustering algorithm to 54,293 VIPERS galaxies working in a parameter space of reliable photometric redshifts and 12 corresponding rest-frame magnitudes. The FEM algorithm distinguishes four main groups: (1) red, (2) green, (3) blue, and (4) outliers. Each group is further divided into 3, 3, 4, and 2 subclasses, respectively. The accuracy of reproducing galaxy classes using spectroscopic data is high: 92%, 84%, 96% for red, green, and blue classes, respectively, except for dusty star-forming galaxies. The presented verification of the photometric classification demonstrates that large photometric samples can be used to distinguish different galaxy classes at z > 0.5 with an accuracy provided so far only by spectroscopic data except for particular galaxy classes., Comment: the letter submitted to MNRAS, 6 pages, 4 figures. Please contact Malgorzata Siudek (msiudek@ifae.es) if you are interested in the catalogue
Published: 2018

26. The VANDELS ESO public spectroscopic survey: observations and first data release

Author: Pentericci, L., Garilli, R. J. McLure B., Cucciati, O., Franzetti, P., Iovino, A., Amorin, R., Bolzonella, M., Bongiorno, A., Carnall, A. C., Castellano, M., Cimatti, A., Cirasuolo, M., Cullen, F., DeBarros, S., Dunlop, J. S., Elbaz, D., Finkelstein, S., Fontana, A., Fontanot, F., Fumana, M., Gargiulo, A., Guaita, L., Hartley, W., Jarvis, M., Juneau, S., Karman, W., Maccagni, D., Marchi, F., Marmol-Queralto, E., Nandra, K., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., Balestra, I., Bardelli, S., Bell, E. F., Bourne, N., Bowler, R. A. A., Brusa, M., Buitrago, F., Caputi, C., Cassata, P., Charlot, S., Citro, A., Cresci, G., Cristiani, S., Curtis-Lake, E., Dickinson, M., Faber, S. M., Fazio, 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., Fèvre, O. Le, Lotz, J., Mannucci, F., Maltby, D., Matsuoka, K., McLeod, D., Mendez-Hernandez, H., Mendez-Abreu, J., Mignoli, M., Moresco, M., Mortlock, A., Nonino, M., Pannella, M., Papovich, C., Popesso, P., Rosario, D. J., Rosati, P., Salvato, M., Santini, P., Schaerer, D., Schreiber, C., Stark, D., Tasca, L. A. M., Thomas, R., Treu, T., Vanzella, E., Wild, V., Williams, C., Zamorani, G., Zucca, E., Pentericci, L., Garilli, R. J. McLure B., Cucciati, O., Franzetti, P., Iovino, A., Amorin, R., Bolzonella, M., Bongiorno, A., Carnall, A. C., Castellano, M., Cimatti, A., Cirasuolo, M., Cullen, F., DeBarros, S., Dunlop, J. S., Elbaz, D., Finkelstein, S., Fontana, A., Fontanot, F., Fumana, M., Gargiulo, A., Guaita, L., Hartley, W., Jarvis, M., Juneau, S., Karman, W., Maccagni, D., Marchi, F., Marmol-Queralto, E., Nandra, K., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., Balestra, I., Bardelli, S., Bell, E. F., Bourne, N., Bowler, R. A. A., Brusa, M., Buitrago, F., Caputi, C., Cassata, P., Charlot, S., Citro, A., Cresci, G., Cristiani, S., Curtis-Lake, E., Dickinson, M., Faber, S. M., Fazio, 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., Fèvre, O. Le, Lotz, J., Mannucci, F., Maltby, D., Matsuoka, K., McLeod, D., Mendez-Hernandez, H., Mendez-Abreu, J., Mignoli, M., Moresco, M., Mortlock, A., Nonino, M., Pannella, M., Papovich, C., Popesso, P., Rosario, D. J., Rosati, P., Salvato, M., Santini, P., Schaerer, D., Schreiber, C., Stark, D., Tasca, L. A. M., Thomas, R., Treu, T., Vanzella, E., Wild, V., Williams, C., Zamorani, G., and Zucca, E.
Abstract: This paper describes the observations and the first data release (DR1) of the ESO public spectroscopic survey "VANDELS, a deep VIMOS survey of the CANDELS CDFS and UDS fields". VANDELS' main targets are star-forming galaxies at 2.4
Published: 2018
Full Text: View/download PDF

27. 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., Marmol-Queralto, E., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., 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., Fevre, O. Le, Lotz, J. M., Mannucci, F., Maltby, D. 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., Zucca, E., 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., Marmol-Queralto, E., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., 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., Fevre, O. Le, Lotz, J. M., Mannucci, F., Maltby, D. 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.
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 ultra-deep optical (0.48 < lambda < 1.0 micron) spectroscopy of ~2100 galaxies within the redshift interval 1.0 < z < 7.0, over a total area of ~0.2 sq. degrees centred on the CANDELS UDS and CDFS fields. Based on accurate photometric redshift pre-selection, 85% 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 < t_int < 80 hours), 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 multi-wavelength 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., Comment: 19 pages, 9 figures, accepted for publication in MNRAS
Published: 2018
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28. 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., Marmol-Queralto, E., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., 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., Le Fevre, O., Lotz, J. M., Mannucci, F., Maltby, D. 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., Zucca, E., 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., Marmol-Queralto, E., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., 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., Le Fevre, O., Lotz, J. M., Mannucci, F., Maltby, D. 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.
Published: 2018

29. The VANDELS ESO public spectroscopic survey:Observations and first data release

Author: Pentericci, L., McLure, R. J., Garilli, B., Cucciati, O., Franzetti, P., Iovino, A., Amorin, R., Bolzonella, M., Bongiorno, A., Carnall, A. C., Castellano, M., Cimatti, A., Cirasuolo, M., Cullen, F., De Barros, S., Dunlop, J. S., Elbaz, D., Finkelstein, S. L., Fontana, A., Fontanot, F., Fumana, M., Gargiulo, A., Guaita, L., Hartley, W. G., Jarvis, M. J., Juneau, S., Karman, W., Maccagni, D., Marchi, F., Marmol-Queralto, E., Nandra, K., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., 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., Le Fevre, O., Lotz, J. M., Mannucci, F., Maltby, D. 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., Zucca, E., Pentericci, L., McLure, R. J., Garilli, B., Cucciati, O., Franzetti, P., Iovino, A., Amorin, R., Bolzonella, M., Bongiorno, A., Carnall, A. C., Castellano, M., Cimatti, A., Cirasuolo, M., Cullen, F., De Barros, S., Dunlop, J. S., Elbaz, D., Finkelstein, S. L., Fontana, A., Fontanot, F., Fumana, M., Gargiulo, A., Guaita, L., Hartley, W. G., Jarvis, M. J., Juneau, S., Karman, W., Maccagni, D., Marchi, F., Marmol-Queralto, E., Nandra, K., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, O., 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., Le Fevre, O., Lotz, J. M., Mannucci, F., Maltby, D. 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.
Published: 2018

30. The VIMOS Public Extragalactic Redshift Survey (VIPERS). AGN feedback in [NeV] emitters

Author: Vergani, D., Garilli, B., Polletta, M., Franzetti, P., Scodeggio, M., Zamorani, G., Haines, C. P., Bolzonella, M., Guzzo, L., Granett, B. R., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., De Lucia, G., Fritz, A., Gargiulo, A., Hawken, A. J., Iovino, A., Krywult, J., Brun, V. Le, Fevre, O. Le, Maccagni, D., Malek, K., Marulli, F., Pollo, A., Tasca, L. A. M., Tojeiro, R., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., Ilbert, O., Moutard, T., Moscardini, L., Vergani, D., Garilli, B., Polletta, M., Franzetti, P., Scodeggio, M., Zamorani, G., Haines, C. P., Bolzonella, M., Guzzo, L., Granett, B. R., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., De Lucia, G., Fritz, A., Gargiulo, A., Hawken, A. J., Iovino, A., Krywult, J., Brun, V. Le, Fevre, O. Le, Maccagni, D., Malek, K., Marulli, F., Pollo, A., Tasca, L. A. M., Tojeiro, R., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., Ilbert, O., Moutard, T., and Moscardini, L.
Abstract: Using an unconventional single line diagnostic that unambiguously identifies AGNs in composite galaxies we report statistical differences in the properties (stellar age, [OII] luminosity, colour) between active and inactive galaxies at 0.62
Published: 2017
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31. The VIMOS Ultra-Deep Survey: evidence for AGN feedback in galaxies with CIII]-$\lambda$1908\AA ~emission 10.8 to 12.5 Gyr ago

Author: Fèvre, O. Le, Lemaux, B. C., Nakajima, K., Schaerer, D., Talia, M., Zamorani, G., Cassata, P., Garilli, B., Maccagni, D., Pentericci, L., Tasca, L. A. M., Zucca, E., Amorin, R., Bardelli, S., Cimatti, A., Giavalisco, M., Guaita, L., Hathi, N. P., Marchi, F., Vanzella, E., Vergani, D., Dunlop, J., Fèvre, O. Le, Lemaux, B. C., Nakajima, K., Schaerer, D., Talia, M., Zamorani, G., Cassata, P., Garilli, B., Maccagni, D., Pentericci, L., Tasca, L. A. M., Zucca, E., Amorin, R., Bardelli, S., Cimatti, A., Giavalisco, M., Guaita, L., Hathi, N. P., Marchi, F., Vanzella, E., Vergani, D., and Dunlop, J.
Abstract: We analyze the CIII]-1908\AA emission properties in a sample of 3899 star-forming galaxies (SFGs) at 23\AA, including 20% with 310\AA. A significant fraction of 1.2% of SFGs presents strong CIII] emission 2010^10 MSun at z~3 into the population of quiescent galaxies observed at redshift z~1-2., Comment: 19 pages, 14 figures, submitted to A&A
Published: 2017
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32. Ly${\alpha}$-Lyman Continuum connection in 3.5 < z < 4.3 star-forming galaxies from the VUDS survey

Author: Marchi, F., Pentericci, L., Guaita, L., Schaerer, D., Verhamme, A., Castellano, M., Ribeiro, B., Garilli, B., Fèvre, O. Le, Amorin, R., Bardelli, S., Cassata, P., Durkalec, A., Grazian, A., Hathi, N. P., Lemaux, B. C., Maccagni, D., Vanzella, E., Zucca, E., Marchi, F., Pentericci, L., Guaita, L., Schaerer, D., Verhamme, A., Castellano, M., Ribeiro, B., Garilli, B., Fèvre, O. Le, Amorin, R., Bardelli, S., Cassata, P., Durkalec, A., Grazian, A., Hathi, N. P., Lemaux, B. C., Maccagni, D., Vanzella, E., and Zucca, E.
Abstract: To identify the galaxies responsible for the reionization of the Universe, we must rely on the investigation of the Lyman Continuum (LyC) properties of z<5 star-forming galaxies, where we can still directly observe their ionizing radiation. We selected a sample of 201 star-forming galaxies from the Vimos Ultra Deep Survey at 3.570{\AA}, Lya(ext)<5.7kpc, rUV<0.3kpc and |Dv Lya|<200km/s, stacked all the galaxies in each subsample and measured the flux density ratio fnu(895)/fnu(1470), that we consider to be a proxy for LyC emission. We compared these ratios to those obtained for the complementary samples. We find that the stacks of galaxies which are UV compact (rUV<0.3kpc) and have bright Lya emission (EWLya>70{\AA}), have much higher LyC fluxes compared to the rest of the galaxy population in agreement with theoretical studies and previous observational works. We also find that galaxies with low Lya(ext) have the highest LyC flux: this new correlation seems even stronger than the correlations with high EWLya and small rUV. These results assume that the stacks from all the subsamples present the same statistical contamination from lower redshift interlopers. If we subtract a statistical contamination from low redshift interlopers obtained with dedicated Monte Carlo simulations, from the flux density ratios (fnu(895)/fnu(1470)) of the significant subsamples we find that these samples contain real LyC leaking flux with a very high probability, but the true average escape fractions remain uncertain. Our work indicates that galaxies with very high EWLya, small Lya(ext) and small rUV are very likely the best candidates to show LyC radiation at z=4 and could therefore be the galaxies that contributed more to reionization., Comment: Accepted by A&A
Published: 2017
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33. The VIMOS Public Extragalactic Redshift Survey (VIPERS): An unbiased estimate of the growth rate of structure at $\mathbf{\left<z\right>=0.85}$ using the clustering of luminous blue galaxies

Author: Mohammad, F. G., Granett, B. R., Guzzo, L., Bel, J., Branchini, E., de la Torre, S., Moscardini, L., Peacock, J. A., Bolzonella, M., Garilli, B., Scodeggio, M., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Iovino, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Małek, K., Marulli, F., Polletta, M., Pollo, A., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Coupon, J., De Lucia, G., Ilbert, O., Moutard, T., Mohammad, F. G., Granett, B. R., Guzzo, L., Bel, J., Branchini, E., de la Torre, S., Moscardini, L., Peacock, J. A., Bolzonella, M., Garilli, B., Scodeggio, M., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Iovino, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Małek, K., Marulli, F., Polletta, M., Pollo, A., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Coupon, J., De Lucia, G., Ilbert, O., and Moutard, T.
Abstract: We use the VIPERS final data release to investigate the performance of colour-selected populations of galaxies as tracers of linear large-scale motions. We empirically select volume-limited samples of blue and red galaxies as to minimise the systematic error on the estimate of the growth rate $f\sigma_8$ from the anisotropy of the two-point correlation function. To this end, rather than rigidly splitting the sample into two colour classes we define the red/blue fractional contribution of each object through a weight based on the $(U-V)$ colour distribution. Using mock surveys that are designed to reproduce the observed properties of VIPERS galaxies, we find the systematic error in recovering the fiducial value of $f\sigma_8$ to be minimized when using a volume-limited sample of luminous blue galaxies. We model non-linear corrections via the Scoccimarro extension of the Kaiser model, finding systematic errors on $f\sigma_8$ of below $1-2\%$, using scales as small as 5 $h^{-1}\mathrm{Mpc}$. We interpret this result as indicating that selection of luminous blue galaxies maximises the fraction that are central objects in their dark matter haloes; this in turn minimises the contribution to the measured $\xi(r_p,\pi)$ from the 1-halo term, which is dominated by non-linear motions. The gain is inferior if one uses the full magnitude-limited sample of blue objects, consistent with the presence of a significant fraction of blue, fainter satellites dominated by non-streaming, orbital velocities. We measure a value of $f\sigma_8=0.45 \pm 0.11$ over the single redshift range $0.6\le z\le 1.0$, corresponding to an effective redshift for the blue galaxies $\left=0.85$. Including in the likelihood the potential extra information contained in the blue-red galaxy cross-correlation function does not lead to an appreciable improvement in the error bars, while it increases the systematic error., Comment: 20 pages, 21 figures, accepted for publication in A&A
Published: 2017
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34. The VIMOS Ultra Deep Survey: The role of HI kinematics and HI column density on the escape of Lyalpha photons in star-forming galaxies at 2<z<4

Author: Guaita, L., Talia, M., Pentericci, L., Verhamme, A., Cassata, P., Lemaux, B. C., Orlitova, I., Ribeiro, B., Schaerer, D., Zamorani, G., Garilli, B., Brun, V. Le, Fevre, O. Le, Maccagni, D., Tasca, L. A. M., Thomas, R., Vanzella, E., Zucca, E., Amorin, R., Bardelli, S., Castellano, M., Grazian, A., Hathi, N. P., Koekemoer, A., Marchi, F., Guaita, L., Talia, M., Pentericci, L., Verhamme, A., Cassata, P., Lemaux, B. C., Orlitova, I., Ribeiro, B., Schaerer, D., Zamorani, G., Garilli, B., Brun, V. Le, Fevre, O. Le, Maccagni, D., Tasca, L. A. M., Thomas, R., Vanzella, E., Zucca, E., Amorin, R., Bardelli, S., Castellano, M., Grazian, A., Hathi, N. P., Koekemoer, A., and Marchi, F.
Abstract: We selected a sample of 76 Lya emitting galaxies from the VIMOS Ultra Deep Survey (VUDS) at 2300km/sec. An ISM with this value of NHI would favour a large amount of scattering events, especially when the medium is static, so it can explain large values of Ext(Lya-C) and small EW(Lya). On the contrary, an ISM with a lower NHI, but large velocity outflows would lead to a Lya spatial profile peaked at the galaxy center (i.e. low values of Ext(Lya-C)) and to a large EW(Lya), as we see in our data. Our results and their interpretation via radiative-transfer models tell us that it is possible to use Lya to study the properties of the HI gas., Comment: Accepted on May 2017
Published: 2017
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35. The VIMOS Ultra Deep Survey: Emerging from the Dark, a Massive Proto-Cluster at z~4.57

Author: Lemaux, B. C., Fèvre, O. Le, Cucciati, O., Ribeiro, B., Tasca, L. A. M., Zamorani, G., Ilbert, O., Thomas, R., Bardelli, S., Cassata, P., Hathi, N. P., Pforr, J., Smolčić, V., Delvecchio, I., Novak, M., Berta, S., McCracken, H. J., Koekemoer, A., Amorín, R., Garilli, B., Maccagni, D., Schaerer, D., Zucca, E., Lemaux, B. C., Fèvre, O. Le, Cucciati, O., Ribeiro, B., Tasca, L. A. M., Zamorani, G., Ilbert, O., Thomas, R., Bardelli, S., Cassata, P., Hathi, N. P., Pforr, J., Smolčić, V., Delvecchio, I., Novak, M., Berta, S., McCracken, H. J., Koekemoer, A., Amorín, R., Garilli, B., Maccagni, D., Schaerer, D., and Zucca, E.
Abstract: Using spectroscopic observations taken for the VIMOS Ultra-Deep Survey (VUDS) we report here on the discovery of PCl J1001+0220, a massive proto-cluster located at $z_{spec}\sim4.57$ in the COSMOS field. The proto-cluster was initially detected as a $\sim12\sigma$ overdensity of typical star-forming galaxies in the blind spectroscopic survey of the early universe ($2
Published: 2017
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36. Analogs of primeval galaxies two billion years after the Big Bang

Author: Amorín, Ricardo, Fontana, A., Pérez-Montero, E., Castellano, M., Guaita, L., Grazian, A., Fèvre, O. Le, Ribeiro, B., Schaerer, D., Tasca, L. A. M., Thomas, R., Bardelli, S., Cassarà, L., Cassata, P., Cimatti, A., Contini, T., de Barros, S., Garilli, B., Giavalisco, M., Hathi, N., Koekemoer, A., Brun, V. Le, Lemaux, B. C., Maccagni, D., Pentericci, L., Pforr, J., Talia, M., Tresse, L., Vanzella, E., Vergani, D., Zamorani, G., Zucca, E., Merlin, E., Amorín, Ricardo, Fontana, A., Pérez-Montero, E., Castellano, M., Guaita, L., Grazian, A., Fèvre, O. Le, Ribeiro, B., Schaerer, D., Tasca, L. A. M., Thomas, R., Bardelli, S., Cassarà, L., Cassata, P., Cimatti, A., Contini, T., de Barros, S., Garilli, B., Giavalisco, M., Hathi, N., Koekemoer, A., Brun, V. Le, Lemaux, B. C., Maccagni, D., Pentericci, L., Pforr, J., Talia, M., Tresse, L., Vanzella, E., Vergani, D., Zamorani, G., Zucca, E., and Merlin, E.
Abstract: Deep observations are revealing a growing number of young galaxies in the first billion year of cosmic time. Compared to typical galaxies at later times, they show more extreme emission-line properties, higher star formation rates, lower masses, and smaller sizes. However, their faintness precludes studies of their chemical abundances and ionization conditions, strongly limiting our understanding of the physics driving early galaxy build-up and metal enrichment. Here we study a rare population of UV-selected, sub$-L^{*}$(z=3) galaxies at redshift 2.4$
Published: 2017

37. Characterization of star-forming dwarf galaxies at 0.1 $\lesssim z \lesssim$ 0.9 in VUDS: Probing the low-mass end of the mass-metallicity relation

Author: 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., Fèvre, O. Le, Maccagni, D., Pentericci, L., Schaerer, D., Talia, M., Tasca, L. A. M., Zucca, E., 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., Fèvre, O. Le, Maccagni, D., Pentericci, L., Schaerer, D., Talia, M., Tasca, L. A. M., and Zucca, E.
Abstract: We present the discovery and spectrophotometric characterization of a large sample of 164 faint ($i_{AB}$ $\sim$ $23$-$25$ mag) star-forming dwarf galaxies (SFDGs) at redshift $0.13$ $\leq z \leq$ $0.88$ 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. We use optical VUDS spectra in the COSMOS, VVDS-02h, and ECDF-S fields, as well as deep multiwavelength photometry, to derive stellar masses, star formation rates (SFR) and gas-phase metallicities. The VUDS SFDGs are compact (median $r_{e}$ $\sim$ $1.2$ kpc), low-mass ($M_{*}$ $\sim$ $10^7-10^9$ $M_{\odot}$) galaxies with a wide range of star formation rates (SFR($H\alpha$) $\sim 10^{-3}-10^{1}$ $M_{\odot}/yr$) and morphologies. Overall, they show a broad range of subsolar metallicities (12+log(O/H)=$7.26$-$8.7$; $0.04$ $\lesssim Z/Z_{\odot} \lesssim$ $1$). 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 partly explained in the low mass range by varying specific SFRs and gas fractions amongst the galaxies in our sample. 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., Comment: 24 Figures, 3 Tables. Accepted for publication in A&A
Published: 2017
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38. The VIMOS Public Extragalactic Redshift Survey (VIPERS). AGN feedback in [NeV] emitters

Author: Vergani, D., Garilli, B., Polletta, M., Franzetti, P., Scodeggio, M., Zamorani, G., Haines, C. P., Bolzonella, M., Guzzo, L., Granett, B. R., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., De Lucia, G., Fritz, A., Gargiulo, A., Hawken, A. J., Iovino, A., Krywult, J., Brun, V. Le, Fevre, O. Le, Maccagni, D., Malek, K., Marulli, F., Pollo, A., Tasca, L. A. M., Tojeiro, R., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., Ilbert, O., Moutard, T., Moscardini, L., Vergani, D., Garilli, B., Polletta, M., Franzetti, P., Scodeggio, M., Zamorani, G., Haines, C. P., Bolzonella, M., Guzzo, L., Granett, B. R., de la Torre, S., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., De Lucia, G., Fritz, A., Gargiulo, A., Hawken, A. J., Iovino, A., Krywult, J., Brun, V. Le, Fevre, O. Le, Maccagni, D., Malek, K., Marulli, F., Pollo, A., Tasca, L. A. M., Tojeiro, R., Zanichelli, A., Arnouts, S., Bel, J., Branchini, E., Coupon, J., Ilbert, O., Moutard, T., and Moscardini, L.
Abstract: Using an unconventional single line diagnostic that unambiguously identifies AGNs in composite galaxies we report statistical differences in the properties (stellar age, [OII] luminosity, colour) between active and inactive galaxies at 0.62
Published: 2017
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39. The VIMOS Ultra-Deep Survey: evidence for AGN feedback in galaxies with CIII]-$\lambda$1908\AA ~emission 10.8 to 12.5 Gyr ago

Author: Fèvre, O. Le, Lemaux, B. C., Nakajima, K., Schaerer, D., Talia, M., Zamorani, G., Cassata, P., Garilli, B., Maccagni, D., Pentericci, L., Tasca, L. A. M., Zucca, E., Amorin, R., Bardelli, S., Cimatti, A., Giavalisco, M., Guaita, L., Hathi, N. P., Marchi, F., Vanzella, E., Vergani, D., Dunlop, J., Fèvre, O. Le, Lemaux, B. C., Nakajima, K., Schaerer, D., Talia, M., Zamorani, G., Cassata, P., Garilli, B., Maccagni, D., Pentericci, L., Tasca, L. A. M., Zucca, E., Amorin, R., Bardelli, S., Cimatti, A., Giavalisco, M., Guaita, L., Hathi, N. P., Marchi, F., Vanzella, E., Vergani, D., and Dunlop, J.
Abstract: We analyze the CIII]-1908\AA emission properties in a sample of 3899 star-forming galaxies (SFGs) at 23\AA, including 20% with 310\AA. A significant fraction of 1.2% of SFGs presents strong CIII] emission 2010^10 MSun at z~3 into the population of quiescent galaxies observed at redshift z~1-2., Comment: 19 pages, 14 figures, submitted to A&A
Published: 2017
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40. Ly${\alpha}$-Lyman Continuum connection in 3.5 < z < 4.3 star-forming galaxies from the VUDS survey

Author: Marchi, F., Pentericci, L., Guaita, L., Schaerer, D., Verhamme, A., Castellano, M., Ribeiro, B., Garilli, B., Fèvre, O. Le, Amorin, R., Bardelli, S., Cassata, P., Durkalec, A., Grazian, A., Hathi, N. P., Lemaux, B. C., Maccagni, D., Vanzella, E., Zucca, E., Marchi, F., Pentericci, L., Guaita, L., Schaerer, D., Verhamme, A., Castellano, M., Ribeiro, B., Garilli, B., Fèvre, O. Le, Amorin, R., Bardelli, S., Cassata, P., Durkalec, A., Grazian, A., Hathi, N. P., Lemaux, B. C., Maccagni, D., Vanzella, E., and Zucca, E.
Abstract: To identify the galaxies responsible for the reionization of the Universe, we must rely on the investigation of the Lyman Continuum (LyC) properties of z<5 star-forming galaxies, where we can still directly observe their ionizing radiation. We selected a sample of 201 star-forming galaxies from the Vimos Ultra Deep Survey at 3.570{\AA}, Lya(ext)<5.7kpc, rUV<0.3kpc and |Dv Lya|<200km/s, stacked all the galaxies in each subsample and measured the flux density ratio fnu(895)/fnu(1470), that we consider to be a proxy for LyC emission. We compared these ratios to those obtained for the complementary samples. We find that the stacks of galaxies which are UV compact (rUV<0.3kpc) and have bright Lya emission (EWLya>70{\AA}), have much higher LyC fluxes compared to the rest of the galaxy population in agreement with theoretical studies and previous observational works. We also find that galaxies with low Lya(ext) have the highest LyC flux: this new correlation seems even stronger than the correlations with high EWLya and small rUV. These results assume that the stacks from all the subsamples present the same statistical contamination from lower redshift interlopers. If we subtract a statistical contamination from low redshift interlopers obtained with dedicated Monte Carlo simulations, from the flux density ratios (fnu(895)/fnu(1470)) of the significant subsamples we find that these samples contain real LyC leaking flux with a very high probability, but the true average escape fractions remain uncertain. Our work indicates that galaxies with very high EWLya, small Lya(ext) and small rUV are very likely the best candidates to show LyC radiation at z=4 and could therefore be the galaxies that contributed more to reionization., Comment: Accepted by A&A
Published: 2017
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41. The VIMOS Public Extragalactic Redshift Survey (VIPERS): An unbiased estimate of the growth rate of structure at $\mathbf{\left<z\right>=0.85}$ using the clustering of luminous blue galaxies

Author: Mohammad, F. G., Granett, B. R., Guzzo, L., Bel, J., Branchini, E., de la Torre, S., Moscardini, L., Peacock, J. A., Bolzonella, M., Garilli, B., Scodeggio, M., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Iovino, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Małek, K., Marulli, F., Polletta, M., Pollo, A., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Coupon, J., De Lucia, G., Ilbert, O., Moutard, T., Mohammad, F. G., Granett, B. R., Guzzo, L., Bel, J., Branchini, E., de la Torre, S., Moscardini, L., Peacock, J. A., Bolzonella, M., Garilli, B., Scodeggio, M., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franzetti, P., Fritz, A., Iovino, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Małek, K., Marulli, F., Polletta, M., Pollo, A., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Coupon, J., De Lucia, G., Ilbert, O., and Moutard, T.
Abstract: We use the VIPERS final data release to investigate the performance of colour-selected populations of galaxies as tracers of linear large-scale motions. We empirically select volume-limited samples of blue and red galaxies as to minimise the systematic error on the estimate of the growth rate $f\sigma_8$ from the anisotropy of the two-point correlation function. To this end, rather than rigidly splitting the sample into two colour classes we define the red/blue fractional contribution of each object through a weight based on the $(U-V)$ colour distribution. Using mock surveys that are designed to reproduce the observed properties of VIPERS galaxies, we find the systematic error in recovering the fiducial value of $f\sigma_8$ to be minimized when using a volume-limited sample of luminous blue galaxies. We model non-linear corrections via the Scoccimarro extension of the Kaiser model, finding systematic errors on $f\sigma_8$ of below $1-2\%$, using scales as small as 5 $h^{-1}\mathrm{Mpc}$. We interpret this result as indicating that selection of luminous blue galaxies maximises the fraction that are central objects in their dark matter haloes; this in turn minimises the contribution to the measured $\xi(r_p,\pi)$ from the 1-halo term, which is dominated by non-linear motions. The gain is inferior if one uses the full magnitude-limited sample of blue objects, consistent with the presence of a significant fraction of blue, fainter satellites dominated by non-streaming, orbital velocities. We measure a value of $f\sigma_8=0.45 \pm 0.11$ over the single redshift range $0.6\le z\le 1.0$, corresponding to an effective redshift for the blue galaxies $\left=0.85$. Including in the likelihood the potential extra information contained in the blue-red galaxy cross-correlation function does not lead to an appreciable improvement in the error bars, while it increases the systematic error., Comment: 20 pages, 21 figures, accepted for publication in A&A
Published: 2017
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42. The VIMOS Ultra Deep Survey: The role of HI kinematics and HI column density on the escape of Lyalpha photons in star-forming galaxies at 2<z<4

Author: Guaita, L., Talia, M., Pentericci, L., Verhamme, A., Cassata, P., Lemaux, B. C., Orlitova, I., Ribeiro, B., Schaerer, D., Zamorani, G., Garilli, B., Brun, V. Le, Fevre, O. Le, Maccagni, D., Tasca, L. A. M., Thomas, R., Vanzella, E., Zucca, E., Amorin, R., Bardelli, S., Castellano, M., Grazian, A., Hathi, N. P., Koekemoer, A., Marchi, F., Guaita, L., Talia, M., Pentericci, L., Verhamme, A., Cassata, P., Lemaux, B. C., Orlitova, I., Ribeiro, B., Schaerer, D., Zamorani, G., Garilli, B., Brun, V. Le, Fevre, O. Le, Maccagni, D., Tasca, L. A. M., Thomas, R., Vanzella, E., Zucca, E., Amorin, R., Bardelli, S., Castellano, M., Grazian, A., Hathi, N. P., Koekemoer, A., and Marchi, F.
Abstract: We selected a sample of 76 Lya emitting galaxies from the VIMOS Ultra Deep Survey (VUDS) at 2300km/sec. An ISM with this value of NHI would favour a large amount of scattering events, especially when the medium is static, so it can explain large values of Ext(Lya-C) and small EW(Lya). On the contrary, an ISM with a lower NHI, but large velocity outflows would lead to a Lya spatial profile peaked at the galaxy center (i.e. low values of Ext(Lya-C)) and to a large EW(Lya), as we see in our data. Our results and their interpretation via radiative-transfer models tell us that it is possible to use Lya to study the properties of the HI gas., Comment: Accepted on May 2017
Published: 2017
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43. The VIMOS Ultra Deep Survey: Emerging from the Dark, a Massive Proto-Cluster at z~4.57

Author: Lemaux, B. C., Fèvre, O. Le, Cucciati, O., Ribeiro, B., Tasca, L. A. M., Zamorani, G., Ilbert, O., Thomas, R., Bardelli, S., Cassata, P., Hathi, N. P., Pforr, J., Smolčić, V., Delvecchio, I., Novak, M., Berta, S., McCracken, H. J., Koekemoer, A., Amorín, R., Garilli, B., Maccagni, D., Schaerer, D., Zucca, E., Lemaux, B. C., Fèvre, O. Le, Cucciati, O., Ribeiro, B., Tasca, L. A. M., Zamorani, G., Ilbert, O., Thomas, R., Bardelli, S., Cassata, P., Hathi, N. P., Pforr, J., Smolčić, V., Delvecchio, I., Novak, M., Berta, S., McCracken, H. J., Koekemoer, A., Amorín, R., Garilli, B., Maccagni, D., Schaerer, D., and Zucca, E.
Abstract: Using spectroscopic observations taken for the VIMOS Ultra-Deep Survey (VUDS) we report here on the discovery of PCl J1001+0220, a massive proto-cluster located at $z_{spec}\sim4.57$ in the COSMOS field. The proto-cluster was initially detected as a $\sim12\sigma$ overdensity of typical star-forming galaxies in the blind spectroscopic survey of the early universe ($2
Published: 2017
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44. Characterization of star-forming dwarf galaxies at 0.1 $\lesssim z \lesssim$ 0.9 in VUDS: Probing the low-mass end of the mass-metallicity relation

Author: 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., Fèvre, O. Le, Maccagni, D., Pentericci, L., Schaerer, D., Talia, M., Tasca, L. A. M., Zucca, E., 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., Fèvre, O. Le, Maccagni, D., Pentericci, L., Schaerer, D., Talia, M., Tasca, L. A. M., and Zucca, E.
Abstract: We present the discovery and spectrophotometric characterization of a large sample of 164 faint ($i_{AB}$ $\sim$ $23$-$25$ mag) star-forming dwarf galaxies (SFDGs) at redshift $0.13$ $\leq z \leq$ $0.88$ 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. We use optical VUDS spectra in the COSMOS, VVDS-02h, and ECDF-S fields, as well as deep multiwavelength photometry, to derive stellar masses, star formation rates (SFR) and gas-phase metallicities. The VUDS SFDGs are compact (median $r_{e}$ $\sim$ $1.2$ kpc), low-mass ($M_{*}$ $\sim$ $10^7-10^9$ $M_{\odot}$) galaxies with a wide range of star formation rates (SFR($H\alpha$) $\sim 10^{-3}-10^{1}$ $M_{\odot}/yr$) and morphologies. Overall, they show a broad range of subsolar metallicities (12+log(O/H)=$7.26$-$8.7$; $0.04$ $\lesssim Z/Z_{\odot} \lesssim$ $1$). 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 partly explained in the low mass range by varying specific SFRs and gas fractions amongst the galaxies in our sample. 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., Comment: 24 Figures, 3 Tables. Accepted for publication in A&A
Published: 2017
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45. Analogs of primeval galaxies two billion years after the Big Bang

Author: Amorín, Ricardo, Fontana, A., Pérez-Montero, E., Castellano, M., Guaita, L., Grazian, A., Fèvre, O. Le, Ribeiro, B., Schaerer, D., Tasca, L. A. M., Thomas, R., Bardelli, S., Cassarà, L., Cassata, P., Cimatti, A., Contini, T., de Barros, S., Garilli, B., Giavalisco, M., Hathi, N., Koekemoer, A., Brun, V. Le, Lemaux, B. C., Maccagni, D., Pentericci, L., Pforr, J., Talia, M., Tresse, L., Vanzella, E., Vergani, D., Zamorani, G., Zucca, E., Merlin, E., Amorín, Ricardo, Fontana, A., Pérez-Montero, E., Castellano, M., Guaita, L., Grazian, A., Fèvre, O. Le, Ribeiro, B., Schaerer, D., Tasca, L. A. M., Thomas, R., Bardelli, S., Cassarà, L., Cassata, P., Cimatti, A., Contini, T., de Barros, S., Garilli, B., Giavalisco, M., Hathi, N., Koekemoer, A., Brun, V. Le, Lemaux, B. C., Maccagni, D., Pentericci, L., Pforr, J., Talia, M., Tresse, L., Vanzella, E., Vergani, D., Zamorani, G., Zucca, E., and Merlin, E.
Abstract: Deep observations are revealing a growing number of young galaxies in the first billion year of cosmic time. Compared to typical galaxies at later times, they show more extreme emission-line properties, higher star formation rates, lower masses, and smaller sizes. However, their faintness precludes studies of their chemical abundances and ionization conditions, strongly limiting our understanding of the physics driving early galaxy build-up and metal enrichment. Here we study a rare population of UV-selected, sub$-L^{*}$(z=3) galaxies at redshift 2.4$
Published: 2017

46. The zCOSMOS-Bright survey: the clustering of early and late galaxy morphological types since z≃ 1

Author: de la Torre, S., Le Fèvre, O., Porciani, C., Guzzo, L., Meneux, B., Abbas, U., Tasca, L., Carollo, C. M., Contini, T., Kneib, J.-P, Lilly, S. J., Mainieri, V., Renzini, A., Scodeggio, M., Zamorani, G., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Coppa, G., Cucciati, O., de Ravel, L., Franzetti, P., Garilli, B., Halliday, C., Iovino, A., Kampczyk, P., Knobel, C., Koekemoer, A. M., Kovač, K., Lamareille, F., Le Borgne, J.-F, Le Brun, V., Maier, C., Mignoli, M., Pelló, R., Peng, Y., Perez-Montero, E., Ricciardelli, E., Silverman, J., Tanaka, M., Tresse, L., Vergani, D., Zucca, E., Bottini, D., Cappi, A., Cassata, P., Cimatti, A., Leauthaud, A., Maccagni, D., Marinoni, C., McCracken, H. J., Memeo, P., Oesch, P., Pozzetti, L., Scaramella, R., de la Torre, S., Le Fèvre, O., Porciani, C., Guzzo, L., Meneux, B., Abbas, U., Tasca, L., Carollo, C. M., Contini, T., Kneib, J.-P, Lilly, S. J., Mainieri, V., Renzini, A., Scodeggio, M., Zamorani, G., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Coppa, G., Cucciati, O., de Ravel, L., Franzetti, P., Garilli, B., Halliday, C., Iovino, A., Kampczyk, P., Knobel, C., Koekemoer, A. M., Kovač, K., Lamareille, F., Le Borgne, J.-F, Le Brun, V., Maier, C., Mignoli, M., Pelló, R., Peng, Y., Perez-Montero, E., Ricciardelli, E., Silverman, J., Tanaka, M., Tresse, L., Vergani, D., Zucca, E., Bottini, D., Cappi, A., Cassata, P., Cimatti, A., Leauthaud, A., Maccagni, D., Marinoni, C., McCracken, H. J., Memeo, P., Oesch, P., Pozzetti, L., and Scaramella, R.
Abstract: We measure the spatial clustering of galaxies as a function of their morphological type at z≃ 0.8, for the first time in a deep redshift survey with full morphological information. This is obtained by combining high-resolution Hubble Space Telescope imaging and Very Large Telescope spectroscopy for about 8500 galaxies to with accurate spectroscopic redshifts from the zCOSMOS-Bright redshift survey. At this epoch, early-type galaxies already show a significantly stronger clustering than late-type galaxies on all probed scales. A comparison to the Sloan Digital Sky Survey Data at z≃ 0.1 shows that the relative clustering strength between early and late morphological classes tends to increase with cosmic time at small separations, while on large scales it shows no significant evolution since z≃ 0.8. This suggests that most early-type galaxies had already formed in intermediate and dense environments at this epoch. Our results are consistent with a picture in which the relative clustering of different morphological types between z≃ 1 and 0 reflects the evolving role of environment in the morphological transformation of galaxies, on top of a global evolution driven by mass
Published: 2017

47. The VIMOS Ultra-Deep Survey: A major merger origin for the high fraction of galaxies at $2<z<6$ with two bright clump

Author: Ribeiro, B., Fèvre, O. Le, Cassata, P., Garilli, B., Lemaux, B. C., Maccagni, D., Schaerer, D., Tasca, L. A. M., Zamorani, G., Zucca, E., Amorín, R., Bardelli, S., Hathi, N. P., Koekemoer, A., Pforr, J., Ribeiro, B., Fèvre, O. Le, Cassata, P., Garilli, B., Lemaux, B. C., Maccagni, D., Schaerer, D., Tasca, L. A. M., Zamorani, G., Zucca, E., Amorín, R., Bardelli, S., Hathi, N. P., Koekemoer, A., and Pforr, J.
Abstract: (Abridged) The properties of stellar clumps in star forming galaxies and their evolution over the redshift range $2\lesssim z \lesssim 6$ are presented and discussed in the context of the build-up of massive galaxies at early cosmic times. We use HST/ACS images of galaxies with spectroscopic redshifts from the VIMOS Ultra Deep Survey (VUDS) to identify clumps within a 20 kpc radius. We find that the population of galaxies with more than one clump is dominated by galaxies with two clumps, representing $\sim21-25$\% of the population, while the fraction of galaxies with 3, or 4 and more, clumps is 8-11 and 7-9\%, respectively. The fraction of clumpy galaxies is in the range $\sim35-55\%$ over $2
Published: 2016
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48. New constraints on the average escape fraction of Lyman continuum radiation in z~4 galaxies from the VIMOS Ultra Deep Survey (VUDS)

Author: Marchi, F., Pentericci, L., Guaita, L., Ribeiro, B., Castellano, M., Schaerer, D., Hathi, N. P., Lemaux, B. C., Grazian, A., Fevre, O. Le, Garilli, B., Maccagni, D., Amorin, R., Bardelli, S., Cassata, P., Fontana, A., Koekemoer, A. M., Brun, V. Le, Tasca, L. A. M., Thomas, R., Vanzella, E., Zamorani, G., Zucca, E., Marchi, F., Pentericci, L., Guaita, L., Ribeiro, B., Castellano, M., Schaerer, D., Hathi, N. P., Lemaux, B. C., Grazian, A., Fevre, O. Le, Garilli, B., Maccagni, D., Amorin, R., Bardelli, S., Cassata, P., Fontana, A., Koekemoer, A. M., Brun, V. Le, Tasca, L. A. M., Thomas, R., Vanzella, E., Zamorani, G., and Zucca, E.
Abstract: Determining the average fraction of Lyman continuum (LyC) photons escaping high redshift galaxies is essential for understanding how reionization proceeded in the z>6 Universe. We want to measure the LyC signal from a sample of sources in the Chandra Deep Field South (CDFS) and COSMOS fields for which ultra-deep VIMOS spectroscopy as well as multi-wavelength Hubble Space Telescope (HST) imaging are available. We select a sample of 46 galaxies at $z\sim 4$ from the VIMOS Ultra Deep Survey (VUDS) database, such that the VUDS spectra contain the LyC part of the spectra, that is, the rest-frame range $880-910\AA$. Taking advantage of the HST imaging, we apply a careful cleaning procedure and reject all the sources showing nearby clumps with different colours, that could potentially be lower-redshift interlopers. After this procedure, the sample is reduced to 33 galaxies. We measure the ratio between ionizing flux (LyC at $895\AA$) and non-ionizing emission (at $\sim 1500 \AA$) for all individual sources. We also produce a normalized stacked spectrum of all sources. Assuming an intrinsic average $L_{\nu}(1470)/L_{\nu}(895)$ of 3, we estimate the individual and average relative escape fraction. We do not detect ionizing radiation from any individual source, although we identify a possible LyC emitter with very high Ly$\alpha$ equivalent width (EW). From the stacked spectrum and assuming a mean transmissivity for the sample, we measure a relative escape fraction $f_{esc}^{rel}=0.09\pm0.04$. We also look for correlations between the limits in the LyC flux and source properties and find a tentative correlation between LyC flux and the EW of the Ly$\alpha$ emission line. Our results imply that the LyC flux emitted by $V=25-26$ star-forming galaxies at z$\sim$4 is at most very modest, in agreement with previous upper limits from studies based on broad and narrow band imaging., Comment: accepted by A&A updated fesc,rel value
Published: 2016
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49. AGN-enhanced outflows of low-ionization gas in star-forming galaxies at 1.7<z<4.6

Author: Talia, M., Brusa, M., Cimatti, A., Lemaux, B. C., Amorin, R., Bardelli, S., Cassarà, L. P., Cucciati, O., Garilli, B., Grazian, A., Guaita, L., Hathi, N. P., Koekemoer, A., Fèvre, O. Le, Maccagni, D., Nakajima, K., Pentericci, L., Pforr, J., Schaerer, D., Vanzella, E., Vergani, D., Zamorani, G., Zucca, E., Talia, M., Brusa, M., Cimatti, A., Lemaux, B. C., Amorin, R., Bardelli, S., Cassarà, L. P., Cucciati, O., Garilli, B., Grazian, A., Guaita, L., Hathi, N. P., Koekemoer, A., Fèvre, O. Le, Maccagni, D., Nakajima, K., Pentericci, L., Pforr, J., Schaerer, D., Vanzella, E., Vergani, D., Zamorani, G., and Zucca, E.
Abstract: Fast and energetic winds are invoked by galaxy formation models as essential processes in the evolution of galaxies. These outflows can be powered either by star-formation and/or AGN activity, but the relative dominance of the two mechanisms is still under debate. We use spectroscopic stacking analysis to study the properties of the low-ionization phase of the outflow in a sample of 1330 star-forming galaxies (SFGs) and 79 X-ray detected (42
Published: 2016
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50. The VIMOS Public Extragalactic Redshift Survey (VIPERS): The growth of structures at $0.5<z<1.2$ from redshift-space distortions in the clustering of the PDR-2 final sample

Author: Pezzotta, A., de la Torre, S., Bel, J., Granett, B. R., Guzzo, L., Peacock, J. A., Garilli, B., Scodeggio, M., Bolzonella, M., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franetti, P., Fritz, A., Iovino, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Małek, K., Marulli, F., Polletta, M., Pollo, A., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Branchini, E., Coupon, J., De Lucia, G., Koda, J., Ilbert, O., Mohammad, F. G., Moutard, T., Moscardini, L., Pezzotta, A., de la Torre, S., Bel, J., Granett, B. R., Guzzo, L., Peacock, J. A., Garilli, B., Scodeggio, M., Bolzonella, M., Abbas, U., Adami, C., Bottini, D., Cappi, A., Cucciati, O., Davidzon, I., Franetti, P., Fritz, A., Iovino, A., Krywult, J., Brun, V. Le, Fèvre, O. Le, Maccagni, D., Małek, K., Marulli, F., Polletta, M., Pollo, A., Tasca, L. A. M., Tojeiro, R., Vergani, D., Zanichelli, A., Arnouts, S., Branchini, E., Coupon, J., De Lucia, G., Koda, J., Ilbert, O., Mohammad, F. G., Moutard, T., and Moscardini, L.
Abstract: We present measurements of the growth rate of cosmological structure from the modelling of the anisotropic galaxy clustering measured in the final data release of the VIPERS survey. The analysis is carried out in configuration space and based on measurements of the first two even multipole moments of the anisotropic galaxy auto-correlation function, in two redshift bins spanning the range $0.5 < z < 1.2$. We provide robust and cosmology-independent corrections for the VIPERS angular selection function, allowing recovery of the underlying clustering amplitude at the percent level down to the Mpc scale. We discuss several improvements on the non-linear modelling of redshift-space distortions (RSD) and perform detailed tests of a variety of approaches against a set of realistic VIPERS-like mock realisations. This includes using novel fitting functions to describe the velocity divergence and density power spectra $P_{\theta\theta}$ and $P_{\delta\theta}$ that appear in RSD models. These tests show that we are able to measure the growth rate with negligible bias down to separations of $5h^{-1}Mpc$. Interestingly, the application to real data shows a weaker sensitivity to the details of non-linear RSD corrections compared to mock results. We obtain consistent values for the growth rate times the matter power spectrum normalisation parameter of $f\sigma_8=0.55\pm 0.12$ and $0.40\pm0.11$ at effective redshifts of $z = 0.6$ and $z=0.86$ respectively. These results are in agreement with standard cosmology predictions assuming Einstein gravity in a $\Lambda \rm{CDM}$ background., Comment: 17 pages, 19 figures
Published: 2016
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