The MUSE Ultra Deep Field (MUDF). II. Survey design and the gaseous properties of galaxy groups at 0.5 < z < 1.5
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Fossati, M
ORCID
Centre for Extragalactic Astronomy, Durham University, South Road, Durham DH1 3LE, UK
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Fumagalli, M
ORCID
Dipartimento di Fisica G. Occhialini, Università degli Studi di Milano-Bicocca, Piazza della Scienza 3, I-20126 Milano, Italy
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Lofthouse, E K
Centre for Extragalactic Astronomy, Durham University, South Road, Durham DH1 3LE, UK
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D’Odorico, V
Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
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Lusso, E
ORCID
INAF–Osservatorio Astrofisico di Arcetri, I-50125 Firenze, Italy
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Cantalupo, S
ORCID
Department of Physics, ETH Zurich, Wolgang-Pauli-Strasse 27, CH-8093 Zurich, Switzerland
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Cooke, R J
ORCID
Centre for Extragalactic Astronomy, Durham University, South Road, Durham DH1 3LE, UK
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Cristiani, S
INAF, Osservatorio Astronomico di Trieste, Via G. B. Tiepolo 11, I-34143 Trieste, Italy
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Haardt, F
INFN, Sezione di Milano-Bicocca, Piazza della Scienza 3, I-20126 Milano, Italy
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Morris, S L
Centre for Advanced Instrumentation, Durham University, South Road, Durham DH1 3LE, UK
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Peroux, C
Aix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, F-13388 Marseille, France
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Prichard, L J
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
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Rafelski, M
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
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Smail, I
ORCID
Centre for Extragalactic Astronomy, Durham University, South Road, Durham DH1 3LE, UK
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Theuns, T
Institute for Computational Cosmology, Durham University, South Road, Durham DH1 3LE, UK
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Published in:
- Monthly Notices of the Royal Astronomical Society. - Oxford University Press (OUP). - 2019, vol. 490, no. 1, p. 1451-1469
English
ABSTRACT
We present the goals, design, and first results of the MUSE Ultra Deep Field (MUDF) survey, a large programme using the Multi Unit Spectroscopic Explorer (MUSE) instrument at the ESO Very Large Telescope. The MUDF survey is collecting ≈150 h on-source of integral field optical spectroscopy in a 1.5 × 1.2 arcmin2 region which hosts several astrophysical structures along the line of sight, including two bright z ≈ 3.2 quasars with close separation (≈500 kpc). Following the description of the data reduction procedures, we present the analysis of the galaxy environment and gaseous properties of seven groups detected at redshifts 0.5 < z < 1.5, spanning a large dynamic range in halo mass, $\log (M_h/\rm {M_\odot }) \approx 11 - 13.5$. For four of the groups, we find associated Mg ii absorbers tracing cool gas in high-resolution spectroscopy of the two quasars, including one case of correlated absorption in both sightlines at distance ≈480 kpc. The absorption strength associated with the groups is higher than what has been reported for more isolated galaxies of comparable mass and impact parameters. We do not find evidence for widespread cool gas giving rise to strong absorption within these groups. Combining these results with the distribution of neutral and ionized gas seen in emission in lower redshift groups, we conclude that gravitational interactions in the group environment strip gas from the galaxy haloes into the intragroup medium, boosting the cross-section of cool gas and leading to the high fraction of strong Mg ii absorbers that we detect.
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green
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https://sonar.ch/global/documents/220071
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