The MUSE Hubble Ultra Deep Field Survey II. Spectroscopic redshifts and comparisons to color selections of high-redshift galaxies

被引：153

作者：

Inami, H. ^{[1
]}

Bacon, R. ^{[1
]}

Brinchmann, J. ^{[2
,3
]}

Richard, J. ^{[1
]}

Contini, T. ^{[4
]}

Conseil, S. ^{[1
]}

Hamer, S. ^{[1
]}

Akhlaghi, M. ^{[1
]}

Bouche, N. ^{[4
]}

Clement, B. ^{[1
]}

Desprez, G. ^{[1
]}

Drake, A. B. ^{[1
]}

Hashimoto, T. ^{[1
]}

Leclercq, F. ^{[1
]}

Maseda, M. ^{[2
]}

Michel-Dansac, L. ^{[1
]}

Paalvast, M. ^{[2
]}

Tresse, L. ^{[1
]}

Ventou, E. ^{[4
]}

Kollatschny, W. ^{[5
]}

Boogaard, L. A. ^{[2
]}

Finley, H. ^{[4
]}

Marino, R. A. ^{[6
]}

Schaye, J. ^{[2
]}

Wisotzki, L. ^{[7
]}

机构：

[1] Univ Lyon 1, ENS Lyon, CNRS, CRAL,UMR 5574, F-69230 St Genis Laval, France

[2] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[3] Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Oporto, Portugal

[4] Univ Toulouse, CNRS, IRAP, 14 Ave Edouard Belin, F-31400 Toulouse, France

[5] Univ Gottingen, Inst Astrophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany

[6] ETH, Inst Astron, Wolfgang Pauli Str 27, CH-8093 Zurich, Switzerland

[7] Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2017年 / 608卷

基金：

瑞士国家科学基金会;

关键词：

galaxies: high-redshift; galaxies: formation; galaxies: evolution; catalogs; surveys; LYMAN BREAK GALAXIES; GOODS-SOUTH FIELD; STAR-FORMING GALAXIES; VLT/FORS2; SPECTROSCOPY; PHOTOMETRIC REDSHIFTS; ULTRAVIOLET-SPECTRA; LUMINOSITY FUNCTION; MASSIVE GALAXIES; RESOLUTION; POPULATION;

D O I：

10.1051/0004-6361/201731195

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have conducted a two-layered spectroscopic survey (1' x 1' ultra deep and 3' x 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 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 approximate to 30 mag (AB, 1 sigma). 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 Ly alpha at 2.9 < z < 6.7 (692 objects). With respect to F775W magnitude, a 50% completeness is reached at 26.5 mag for ultra deep and 25.5 mag for deep fields, and the completeness remains greater than or similar to 20% up to 28-29 mag and approximate to 27 mag, respectively. We used the determined redshifts to test continuum color selection (dropout) diagrams of high-z galaxies. The selection condition for F336W dropouts successfully captures approximate to 80% of the targeted z similar to 2.7 galaxies. However, for higher redshift selections (F435W, F606W, and F775W dropouts), the success rates decrease to approximate to 20-40%. We empirically redefine the selection boundaries to make an attempt to improve them to approximate to 60%. The revised boundaries allow bluer colors that capture Ly alpha emitters with high Ly alpha equivalent widths falling in the broadbands used for the color-color selection. Along with this paper, we release the redshift and line flux catalog.

引用

页数：26

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