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Start Over Author "Silverman, JD" Topic galaxies: high-redshift
6 results on '"Silverman, JD"'

1. SILVERRUSH. V. Census of Lyα, [O III] λ5007, Hα, and [C II] 158 μm Line Emission with ∼1000 LAEs at z = 4.9-7.0 Revealed with Subaru/HSC

Author

Harikane, Y, Ouchi, M, Shibuya, T, Kojima, T, Zhang, H, Itoh, R, Ono, Y, Higuchi, R, Inoue, AK, Chevallard, J, Capak, PL, Nagao, T, Onodera, M, Faisst, AL, Martin, CL, Rauch, M, Bruzual, GA, Charlot, S, Davidzon, I, Fujimoto, S, Hilmi, M, Ilbert, O, Lee, CH, Matsuoka, Y, Silverman, JD, and Toft, S

Subjects
galaxies: evolution, galaxies: formation, galaxies: high-redshift, Astronomy & Astrophysics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural)
Abstract

We investigate Lyα, [O iii] λ5007, Hα, and [C ii] 158 μm emission from 1124 galaxies at z = 4.9-7.0. Our sample is composed of 1092 Lyα emitters (LAEs) at z = 4.9, 5.7, 6.6, and 7.0 identified by Subaru/Hyper-Suprime-Cam (HSC) narrowband surveys covered by Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH) and 34 galaxies at z = 5.148-7.508 with deep ALMA [C ii] 158 μm data in the literature. Fluxes of strong rest-frame optical lines of [O iii] and Hα (Hβ) are constrained by significant excesses found in the SPLASH 3.6 and 4.5 μm photometry. At z = 4.9, we find that the rest-frame Hα equivalent width and the Lyα escape fraction f Lyα positively correlate with the rest-frame Lyα equivalent width fLyα positively correlate with the rest-frame Lyα equivalent width EWLyα0 . The correlation is similarly found at z ∼ 0-2, suggesting no evolution of the correlation over z ≃ 0-5. The typical ionizing photon production efficiency of LAEs is log(ξ ion/[Hz erg-1]) ≃ 25.5, significantly (60%-100%) higher than those of LBGs at a given UV magnitude. At z = 5.7-7.0, there exists an interesting turnover trend that the [O iii]/Hα flux ratio increases in and then decreases out to . We also identify an anticorrelation between a ratio of [C ii] luminosity to star formation rate (L [C ii]/SFR) and at the >99% confidence level.. We carefully investigate physical origins of the correlations with stellar-synthesis and photoionization models and find that a simple anticorrelation between and metallicity explains self-consistently all of the correlations of Lyα, Hα, [O iii]/Hα, and [C ii] identified in our study, indicating detections of metal-poor (∼0.03 Z o) galaxies with .

Published
2018

2. The ALPINE-ALMA [C II] survey: A triple merger at z ∼ 4.56

Author

Jones, GC, Béthermin, M, Fudamoto, Y, Ginolfi, M, Capak, P, Cassata, P, Faisst, A, Le Fèvre, O, Schaerer, D, Silverman, JD, Yan, L, Bardelli, S, Boquien, M, Cimatti, A, Dessauges-Zavadsky, M, Giavalisco, M, Gruppioni, C, Ibar, E, Khusanova, Y, Koekemoer, AM, Lemaux, BC, Loiacono, F, Maiolino, R, Oesch, PA, Pozzi, F, Riechers, D, Rodighiero, G, Talia, M, Vallini, L, Vergani, D, Zamorani, G, and Zucca, E

Subjects
13. Climate action, galaxies: high-redshift, galaxies: interactions, galaxies: evolution, galaxies: kinematics and dynamics
Abstract

We report the detection of [CII]158um emission from a system of three closely-separated sources in the COSMOS field at z~4.56, as part of the ALMA Large Program to INvestigate CII at Early times (ALPINE). The two dominant sources are closely associated, both spatially (1.6"~11kpc) and in velocity (~100km/s), while the third source is slightly more distant (2.8"~18kpc, ~300km/s). The second strongest source features a slight velocity gradient, while no significant velocity gradient is seen in the other two sources. Using the observed [CII] luminosities, we derive a total log(SFR_[CII]/[Msol/year])=2.8+/-0.2, which may be split into contributions of 59%, 31%, and 10% from the central, east, and west sources, respectively. Comparison of these [CII] detections to recent zoom-in cosmological simulations suggests an ongoing major merger. We are thus witnessing a system in a major phase of mass build-up by merging, including an on-going major merger and an upcoming minor merger, which is expected to end up in a single massive galaxy by z~2.5., ERC Advanced Grant 695671 “QUENCH"

3. ALMA observations of cold molecular gas in AGN hosts at z ~ 1.5 – evidence of AGN feedback?

Author

Kakkad, D, Mainieri, V, Brusa, M, Padovani, P, Carniani, S, Feruglio, C, Sargent, M, Husemann, B, Bongiorno, A, Bonzini, M, Piconcelli, E, Silverman, JD, and Rujopakarn, W

Subjects
quasars: emission lines, submillimetre: ISM, 13. Climate action, galaxies: high-redshift, Astrophysics::High Energy Astrophysical Phenomena, galaxies: star formation, galaxies: active, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics, ISM: molecules
Abstract

Similarly to the cosmic star formation history, the black hole accretion rate density of the Universe peaked at 199 per cent probability of lower depletion time-scales and lower molecular gas fractions in AGN hosts with respect to the non-AGN comparison sample. We discuss the implications of these observations on the impact that AGN feedback may have on star formation efficiency of $z$ > 1 galaxies., MB acknowledges support from the FP7 Career Integration Grant ‘eEASY: supermassive black holes through cosmic time from current surveys to eROSITA-Euclid Synergies’ (CIG 321913). SC acknowledges financial support from the Science and Technology Facilities Council (STFC). CF acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant agreement no. 664931. MTS acknowledges support from a Royal Society Leverhulme Trust Senior Research Fellowship (LT150041). This paper makes use of the following ALMA data: ADS/JAO.ALMA#2013.1.00171.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), NSC and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ.

4. The ALPINE-ALMA [C II] survey : star-formation-driven outflows and circumgalactic enrichment in the early Universe

Author

Michele Ginolfi, G. Rodighiero, Roberto Maiolino, Edo Ibar, Médéric Boquien, D. Vergani, Francesca Pozzi, F. Loiacono, Sune Toft, Carlotta Gruppioni, Lin Yan, Livia Vallini, Matthieu Béthermin, O. Le Fevre, S. Bardelli, G. C. Jones, G. Zamorani, R. Carraro, Andreas L. Faisst, Miroslava Dessauges-Zavadsky, Desika Narayanan, Daniel Schaerer, Brian C. Lemaux, Y. Khusanova, Y. Fudamoto, Pascal Oesch, Margherita Talia, Seiji Fujimoto, Peter Capak, Paolo Cassata, John D. Silverman, Mauro Giavalisco, Ginolfi, M., Jones, G. C., Bethermin, M., Fudamoto, Y., Loiacono, F., Fujimoto, S., Le Fevre, O., Faisst, A., Schaerer, D., Cassata, P., Silverman, J. D., Yan, L., Capak, P., Bardelli, S., Boquien, M., Carraro, R., Dessauges-Zavadsky, M., Giavalisco, M., Gruppioni, C., Ibar, E., Khusanova, Y., Lemaux, B. C., Maiolino, R., Narayanan, D., Oesch, P., Pozzi, F., Rodighiero, G., Talia, M., Toft, S., Vallini, L., Vergani, D., Zamorani, G., Ginolfi, M, Jones, GC, Bethermin, M, Fudamoto, Y, Loiacono, F, Fujimoto, S, Le Fevre, O, Faisst, A, Schaerer, D, Cassata, P, Silverman, JD, Yan, L, Capak, P, Bardelli, S, Boquien, M, Carraro, R, Dessauges-Zavadsky, M, Giavalisco, M, Gruppioni, C, Ibar, E, Khusanova, Y, Lemaux, BC, Maiolino, R, Narayanan, D, Oesch, P, Pozzi, F, Rodighiero, G, Talia, M, Toft, S, Vallini, L, Vergani, D, Zamorani, G, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Jones, Gareth [0000-0002-0267-9024], Maiolino, Roberto [0000-0002-4985-3819], and Apollo - University of Cambridge Repository

Subjects
media_common.quotation_subject, astro-ph.GA, Continuum (design consultancy), Stacking, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Computer Science::Computational Geometry, 01 natural sciences, star formation [Galaxies], high-redshift [Galaxies], Settore FIS/05 - Astronomia e Astrofisica, galaxies: high-redshift, 0103 physical sciences, ISM [Galaxies], galaxies: formation, 010303 astronomy & astrophysics, ISM: jets and outflow, Astrophysics::Galaxy Astrophysics, media_common, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Star formation, jets and outflows [ISM], Astronomy and Astrophysics, evolution [Galaxies], Astrophysics - Astrophysics of Galaxies, formation [Galaxies], Universe, Galaxy, Large sample, Baryon, ISM: jets and outflows, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Astrophysics of Galaxies (astro-ph.GA), galaxies: star formation, galaxies: evolution, galaxies: ISM, Outflow
Abstract

We study the efficiency of galactic feedback in the early Universe by stacking the [C II] 158 um emission in a large sample of normal star-forming galaxies at 4 < z < 6 from the ALMA Large Program to INvestigate [C II] at Early times (ALPINE) survey. Searching for typical signatures of outflows in the high-velocity tails of the stacked [C II] profile, we observe (i) deviations from a single-component Gaussian model in the combined residuals and (ii) broad emission in the stacked [C II] spectrum, with velocities of |v| 4. From the stacking analysis of the datacubes, we find that the combined [C II] core emission (|v|< 200 km/s) of the higher-SFR galaxies is extended on physical sizes of ~ 30 kpc (diameter scale), well beyond the analogous [C II] core emission of lower-SFR galaxies and the stacked far-infrared continuum. The detection of such extended metal-enriched gas, likely tracing circumgalactic gas enriched by past outflows, corroborates previous similar studies, confirming that baryon cycle and gas exchanges with the circumgalactic medium are at work in normal star-forming galaxies already at early epochs., Comment: 16 pages, 10 figures. Accepted for publication in A&A

Published
2020
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5. The fmos-cosmos survey of star-forming galaxies at z similar to 1.6. iii. survey design, performance, and sample characteristics

Author

J. D. Silverman, D. Kashino, D. Sanders, J. S. Kartaltepe, N. Arimoto, A. Renzini, G. Rodighiero, E. Daddi, J. Zahid, T. Nagao, L. J. Kewley, S. J. Lilly, N. Sugiyama, I. Baronchelli, P. Capak, C. M. Carollo, J. Chu, G. Hasinger, O. Ilbert, S. Juneau, M. Kajisawa, A. M. Koekemoer, K. Kovac, O. Le Fèvre, D. Masters, H. J. McCracken, M. Onodera, A. Schulze, N. Scoville, V. Strazzullo, Y. Taniguchi, The University of Tokyo (UTokyo), Nagoya University, University of Hawai'i [Honolulu] (UH), National Optical Astronomy Observatory (NOAO), Rochester Institute of Technology, Subaru Telescope, National Astronomical Observatory of Japan (NAOJ), INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF), Dipartimento di Astronomia [Padova], Universita degli Studi di Padova, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Institute for Astronomy [Honolulu], University of Hawai‘i [Mānoa] (UHM), Ehime University [Matsuyama], Research School of Astronomy and Astrophysics [Canberra] (RSAA), Australian National University (ANU), Institute of Astronomy [ETH Zürich], Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), California Institute of Technology (CALTECH), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Space Telescope Science Institute (STSci), Carnegie Observatories, Carnegie Institution for Science [Washington], Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), European Project: 268107,EC:FP7:ERC,ERC-2010-AdG_20100224,EARLY(2011), Università degli Studi di Padova = University of Padua (Unipd), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Ehime University [Matsuyama, Japon], Carnegie Institution for Science, The University of Tokyo, Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich)-Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), The Observatories of the Carnegie Institution for Science, Silverman, Jd, Kashino, D, Sanders, D, Kartaltepe, J, Arimoto, N, Renzini, A, Rodighiero, G, Daddi, E, Zahid, J, Nagao, T, Kewley, Lj, Lilly, Sj, Sugiyama, N, Baronchelli, I, Capak, P, Carollo, Cm, Chu, J, Hasinger, G, Ilbert, O, Juneau, S, Kajisawa, M, Koekemoer, Am, Kovac, K, Le Fevre, O, Masters, D, Mccracken, Hj, Onodera, M, Schulze, A, Scoville, N, Strazzullo, V, and Taniguchi, Y

Subjects
Galaxies: general, Active galactic nucleus, Stellar mass, Metallicity, Extinction (astronomy), FOS: Physical sciences, Techniques: spectroscopic, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Supporting material: machine-readable table, Surveys, galaxies: general, galaxies: high-redshift, galaxies: ISM, surveys, techniques: spectroscopic Supporting material: machine-readable table, Astronomy and Astrophysics, Space and Planetary Science, Galaxy formation and evolution, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Galaxy Astrophysics, Physics, Star formation, Galaxies: high-redshift, Astrophysics - Astrophysics of Galaxies, Galaxy, Interstellar medium, Galaxies: ISM, Astrophysics of Galaxies (astro-ph.GA), [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

We present a spectroscopic survey of galaxies in the COSMOS field using the Fiber Multi-Object Spectrograph (FMOS), a near-infrared instrument on the Subaru Telescope. Our survey is specifically designed to detect the Halpha emission line that falls within the H-band (1.6-1.8 um) spectroscopic window from star-forming galaxies with 1.4 < z < 1.7 and M_stellar>~10^10 Msolar. With the high multiplex capability of FMOS, it is now feasible to construct samples of over one thousand galaxies having spectroscopic redshifts at epochs that were previously challenging. The high-resolution mode (R~2600) effectively separates Halpha and [NII]6585 thus enabling studies of the gas-phase metallicity and photoionization state of the interstellar medium. The primary aim of our program is to establish how star formation depends on stellar mass and environment, both recognized as drivers of galaxy evolution at lower redshifts. In addition to the main galaxy sample, our target selection places priority on those detected in the far-infrared by Herschel/PACS to assess the level of obscured star formation and investigate, in detail, outliers from the star formation rate - stellar mass relation. Galaxies with Halpha detections are followed up with FMOS observations at shorter wavelengths using the J-long (1.11-1.35 um) grating to detect Hbeta and [OIII]5008 that provides an assessment of extinction required to measure star formation rates not hampered by dust, and an indication of embedded Active Galactic Nuclei. With 460 redshifts measured from 1153 spectra, we assess the performance of the instrument with respect to achieving our goals, discuss inherent biases in the sample, and detail the emission-line properties. Our higher-level data products, including catalogs and spectra, are available to the community., 26 pages, Updated version resubmitted to ApJSS; Data products and catalogs are now available at http://member.ipmu.jp/fmos-cosmos/

Published
2015
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6. THE FMOS-COSMOS SURVEY OF STAR-FORMING GALAXIES AT z similar to 1.6. I. H alpha-BASED STAR FORMATION RATES AND DUST EXTINCTION

Author

Kashino, D., Silverman, J. D., Rodighiero, G., Renzini, A., Arimoto, N., Daddi, Emanuele, Lilly, S. J., Sanders, D. B., Kartaltepe, J., Zahid, H. J., Nagao, T., Sugiyama, N., Capak, P., Carollo, C. M., Chu, J., Hasinger, G., Ilbert, O., Kajisawa, M., Kewley, L. J., Koekemoer, A. M., Kovac, K., Le Fevre, O., Masters, D., Mccracken, H. J., Onodera, M., Scoville, N., Strazzullo, V., Symeonidis, M., Taniguchi, Y., Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), European Project: 268107,EC:FP7:ERC,ERC-2010-AdG_20100224,EARLY(2011), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Kashino, D, Silverman, Jd, Rodighiero, G, Renzini, A, Arimoto, N, Daddi, E, Lilly, Sj, Sanders, Db, Kartaltepe, J, Zahid, Hj, Nagao, T, Sugiyama, N, Capak, P, Carollo, Cm, Chu, J, Hasinger, G, Ilbert, O, Kajisawa, M, Kewley, Lj, Koekemoer, Am, Kovac, K, Le Fevre, O, Masters, D, Mccracken, Hj, Onodera, M, Scoville, N, Strazzullo, V, Symeonidis, M, and Taniguchi, Y

Subjects
Galaxies: general, Galaxies: ISM, Galaxies: star formation, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Galaxies: high-redshift, Galaxies: evolution
Abstract

International audience; We present the first results from a near-IR spectroscopic survey of the COSMOS field, using the Fiber Multi-Object Spectrograph on the Subaru telescope, designed to characterize the star-forming galaxy population at 1.4 \textless z \textless 1.7. The high-resolution mode is implemented to detect H alpha in emission between 1.6-1.8 mu m with f(H alpha) greater than or similar to 4 x 10(-17) erg cm(-2) s(-1). Here, we specifically focus on 271 sBzK-selected galaxies that yield a H alpha detection thus providing a redshift and emission line luminosity to establish the relation between star formation rate and stellar mass. With further J-band spectroscopy for 89 of these, the level of dust extinction is assessed by measuring the Balmer decrement using co-added spectra. We find that the extinction (0.6 less than or similar to A(H alpha) less than or similar to 2.5) rises with stellar mass and is elevated at high masses compared to low-redshift galaxies. Using this subset of the spectroscopic sample, we further find that the differential extinction between stellar and nebular emission E-star(B - V)/E-neb(B - V) is 0.7-0.8, dissimilar to that typically seen at low redshift. After correcting for extinction, we derive an H alpha-based main sequence with a slope (0.81 +/- 0.04) and normalization similar to previous studies at these redshifts.

Published
2013
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