Close-up view of a luminous star-forming galaxy at z = 2.95
| Autor: | A. Carnero Rosell, I. Perez-Fournon, C. N. Herrera, Steve Serjeant, Andrew I. Harris, R. Neri, C. Yang, Axel Weiß, Lucia Marchetti, A. J. Young, Catherine Vlahakis, Hugo Messias, M. Krips, T. Bakx, Mattia Negrello, David H. Hughes, Asantha Cooray, Guilaine Lagache, Alexandre Beelen, Rob Ivison, Helmut Dannerbauer, Matthew D. Lehnert, Pierre Cox, S. Urquhart, Andrew J. Baker, P. van der Werf, Simon Dye, B. M. Jones, Alain Omont, V. Buat, Dominik Riechers, Shuowen Jin, Isabella Cortzen, Raphael Gavazzi, Loretta Dunne, F. Stanley, S. Berta, Steve Eales |
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| Přispěvatelé: | Institut de RadioAstronomie Millimétrique (IRAM), Centre National de la Recherche Scientifique (CNRS), Rutgers, The State University of New Jersey [New Brunswick] (RU), Rutgers University System (Rutgers), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Astronomia [Padova], Università degli Studi di Padova = University of Padua (Unipd), Tongji University, Department of Astronomy [Ithaca], Cornell University [New York], Institut für Astronomie [Wien], Universität Wien, Instituto de Astrofisica de Canarias (IAC), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), 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), Department of Physics and Astronomy [Irvine], University of California [Irvine] (UC Irvine), University of California (UC)-University of California (UC), School of Physics and Astronomy [Cardiff], Cardiff University, Max-Planck-Institut für Extraterrestrische Physik (MPE), Max-Planck-Institut für Radioastronomie (MPIFR), AUTRES, CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Universita degli Studi di Padova, Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), University of California [Irvine] (UCI), University of California-University of California, BUAT, Veronique |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
submillimeter: galaxies
Cosmology and Nongalactic Astrophysics (astro-ph.CO) Absorption spectroscopy Einstein ring Infrared Astrophysics - cosmology and nongalactic astrophysics FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph] 01 natural sciences Spectral line [SDU] Sciences of the Universe [physics] symbols.namesake galaxies: high-redshift 0103 physical sciences Emission spectrum 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Photometric redshift Physics [PHYS]Physics [physics] radio lines: ISM [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] 010308 nuclear & particles physics gravitational lensing: strong Astronomy and Astrophysics Galaxy 13. Climate action Space and Planetary Science [SDU]Sciences of the Universe [physics] galaxies: star formation symbols Millimeter Astrophysics::Earth and Planetary Astrophysics [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] galaxies: ISM |
| Zdroj: | Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, 2021, 646, pp.A122. ⟨10.1051/0004-6361/202039743⟩ Astronomy & Astrophysics Astronomy & Astrophysics, 646, 1-33 Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 646, pp.A122. ⟨10.1051/0004-6361/202039743⟩ |
| ISSN: | 0004-6361 1432-0746 |
| Popis: | (Abridged) Exploiting the sensitivity and broad band width of NOEMA, we have studied the molecular gas and dust in the galaxy HerBS-89a, at z=2.95. High angular resolution images reveal a partial 1.0" diameter Einstein ring in the dust continuum emission and the molecular emission lines of 12CO(9-8) and H2O(2_02-1_11). We report the detection of the three fundamental transitions of the molecular ion OH+, seen in absorption; the molecular ion CH+(1-0) seen in absorption (and tentatively in emission); two transitions of amidogen (NH2), seen in emission; and HCN(11-10) and/or NH(1_2-0_1) seen in absorption. The NOEMA data are complemented with VLA data tracing the 12CO(1-0) emission line, which provides a measurement of the total mass of molecular gas and an anchor for a CO excitation analysis. In addition, we present HST imaging that reveals the foreground lensing galaxy in the near-infrared. Together with data from the GTC, we derive a photometric redshift of z(phot)~0.9 for the foreground lensing galaxy. Modelling the lensing of HerBS-89a, we reconstruct the dust continuum and molecular emission lines (magnified by a factor ~4-5) in the source plane. The 12CO(9-8) and H2O emission lines have comparable spatial and kinematic distributions; the source-plane reconstructions do not clearly distinguish between a one-component and a two-component scenario, but the latter accounts for the observed broad line widths. HerBS-89a is a powerful star forming galaxy with a dust-to-gas ratio delta(GDR)~80, a SFR = 614 +/- 59 Msun/yr and a depletion timescale tau(depl) = (3.4 +/- 1.0) 1e8 years. The OH+ and CH+ absorption lines, all have their main velocity component red-shifted by \Delta(V)~100 km/s relative to the global CO reservoir. We argue that these absorption lines trace a rare example of gas inflow towards the center of the galaxy. Comment: 33 pages, Accepted for publication on A&A |
| Databáze: | OpenAIRE |
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