The MUSE Hubble Ultra Deep Field Survey

H. Inami (1) , R. Bacon (1) , J. Brinchmann , J. Richard (1) , T. Contini (2) , S. Conseil (1) , S. Hamer , M. Akhlaghi (1) , N. Bouché , B. Clément (3, 4) , G. Desprez , A. B. Drake , T. Hashimoto (1) , F. Leclercq , M. Maseda , L. Michel-Dansac (1) , M. Paalvast , L. Tresse (1) , E. Ventou (2) , W. Kollatschny , L. A. Boogaard , H. Finley (2) , R. A. Marino , J. Schaye , L. Wisotzki

1 CRAL - Centre de Recherche Astrophysique de Lyon
2 IRAP - Institut de recherche en astrophysique et planétologie
3 Centre Hospitalier Universitaire [Rennes]
4 NuMeCan - Nutrition, Métabolismes et Cancer

We have conducted a two-layered spectroscopic survey (1′ × 1′ ultra deep and 3′ × 3′ deep regions) in the Hubble Ultra Deep Field (HUDF) with the Multi Unit Spectroscopic Explorer (MUSE). The combination of a large field of view, high sensitivity, and wide wavelength coverage provides an order of magnitude improvement in spectroscopically confirmed redshifts in the HUDF; i.e., 1206 secure spectroscopic redshifts for Hubble Space Telescope (HST) continuum selected objects, which corresponds to 15% of the total (7904). The redshift distribution extends well beyond z> 3 and to HST/F775W magnitudes as faint as ≈ 30 mag (AB, 1σ). In addition, 132 secure redshifts were obtained for sources with no HST counterparts that were discovered in the MUSE data cubes by a blind search for emission-line features. In total, we present 1338 high quality redshifts, which is a factor of eight increase compared with the previously known spectroscopic redshifts in the same field. We assessed redshifts mainly with the spectral features [O ii] at z< 1.5 (473 objects) and Lyα at 2.9

Mots clés: galaxies: high-redshift; galaxies: formation; galaxies: evolution; catalogs; surveys

Domaines: Astrophysique [astro-ph]

H. Inami, R. Bacon, J. Brinchmann, J. Richard, T. Contini, et al.. The MUSE Hubble Ultra Deep Field Survey: II. Spectroscopic redshifts and comparisons to color selections of high-redshift galaxies. Astronomy and Astrophysics - A&A, 2017, 608, pp.A2. ⟨10.1051/0004-6361/201731195⟩. ⟨hal-02965083⟩