Merger-driven star formation activity in Cl J1449+0856 at z = 1.99 as seen by ALMA and JVLA
| Autor: | Masato Onodera, R. T. Coogan, M. Carollo, Alvio Renzini, Helmut Dannerbauer, Evangelia Tremou, Maurilio Pannella, Mark Sargent, Georgios E. Magdis, V. Strazzullo, Andrea Cimatti, R. Gobat, Matthieu Béthermin, Emanuele Daddi, Francesco Valentino, Daizhong Liu |
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| Přispěvatelé: | 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), Ludwig-Maximilians-Universität München (LMU), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), Institute for Astronomy [Zürich], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Max-Planck-Institut für Extraterrestrische Physik (MPE), T Coogan, R, Daddi, E, T Sargent, M, Strazzullo, V, Valentino, F, Gobat, R, Magdis, G, Bethermin, M, Pannella, M, Onodera, M, Liu, D, Cimatti, A, Dannerbauer, H, Carollo, M, Renzini, A, Tremou, E, Coogan, R. T., Daddi, E., Sargent, M. T., Strazzullo, V., Valentino, F., Gobat, R., Magdis, G., Bethermin, M., Pannella, M., Onodera, M., Liu, D., Cimatti, A., Dannerbauer, H., Carollo, M., Renzini, A., Tremou, E., 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), 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), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Active galactic nucleus
galaxies: clusters: individual: Cl J1449+0856 galaxies: evolution galaxies: high-redshift galaxies: ISM galaxies: star formation Astrophysics - Astrophysics of Galaxies FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Galaxy merger 01 natural sciences Jansky 0103 physical sciences Galaxies:high-redshift 010303 astronomy & astrophysics evolution [galaxies] Astrophysics::Galaxy Astrophysics QB Physics ISM [galaxies] 010308 nuclear & particles physics Star formation Gas depletion Astronomy and Astrophysics Astronomy and Astrophysic Galaxy Interstellar medium Galaxies evolution [PHYS.ASTR.GA]Physics [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA] 13. Climate action Space and Planetary Science Excited state Astrophysics of Galaxies (astro-ph.GA) clusters: individual: Cl J1449+0856 [galaxies] Astrophysics::Earth and Planetary Astrophysics star formation [galaxies] high-redshift [galaxies] |
| Zdroj: | Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, 2018, 479 (1), pp.703-729. ⟨10.1093/mnras/sty1446⟩ Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2018, 479 (1), pp.703-729. ⟨10.1093/mnras/sty1446⟩ Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2018, 479, pp.703-729 |
| ISSN: | 0035-8711 1365-2966 |
| DOI: | 10.1093/mnras/sty1446⟩ |
| Popis: | We use ALMA and JVLA observations of the galaxy cluster Cl J1449+0856 at z=1.99, in order to study how dust-obscured star-formation, ISM content and AGN activity are linked to environment and galaxy interactions during the crucial phase of high-z cluster assembly. We present detections of multiple transitions of $^{12}$CO, as well as dust continuum emission detections from 11 galaxies in the core of Cl J1449+0856. We measure the gas excitation properties, star-formation rates, gas consumption timescales and gas-to-stellar mass ratios for the galaxies. We find evidence for a large fraction of galaxies with highly-excited molecular gas, contributing $>$50% to the total SFR in the cluster core. We compare these results with expectations for field galaxies, and conclude that environmental influences have strongly enhanced the fraction of excited galaxies in this cluster. We find a dearth of molecular gas in the galaxies' gas reservoirs, implying a high star-formation efficiency (SFE) in the cluster core, and find short gas depletion timescales $��$ 29 pages, 15 figures, 7 tables + Appendix. Accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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