A WFC3 GRISM EMISSION LINE REDSHIFT CATALOG IN THE GOODS-SOUTH FIELD

被引：46

作者：

Morris, Aaron M. ^{[1
]}

Kocevski, Dale D. ^{[1
]}

Trump, Jonathan R. ^{[2
]}

Weiner, Benjamin J. ^{[3
]}

Hathi, Nimish P. ^{[4
]}

Barro, Guillermo ^{[5
,6
]}

Dahlen, Tomas ^{[7
]}

Faber, Sandra M. ^{[5
,6
]}

Finkelstein, Steven L. ^{[8
]}

Fontana, Adriano ^{[9
]}

Ferguson, Henry C. ^{[7
]}

Grogin, Norman A. ^{[7
]}

Gruetzbauch, Ruth ^{[10
,11
]}

Guo, Yicheng ^{[5
,6
,12
]}

Hsu, Li-Ting ^{[13
]}

Koekemoer, Anton M. ^{[7
]}

Koo, David C. ^{[5
,6
]}

Mobasher, Bahram ^{[14
]}

Pforr, Janine ^{[15
,16
]}

Salvato, Mara ^{[13
]}

Wiklind, Tommy ^{[7
]}

Wuyts, Stijn ^{[13
]}

机构：

[1] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

[2] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA

[3] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

[4] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France

[5] Univ Calif Santa Cruz, UCO Lick Observ, Santa Cruz, CA 95064 USA

[6] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[7] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[8] Univ Texas Austin, Austin, TX 78712 USA

[9] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, RM, Italy

[10] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[11] Univ Lisbon, Ctr Astron & Astrophys, P-1349018 Lisbon, Portugal

[12] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA

[13] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[14] Colby Coll, Dept Phys & Astron, Waterville, ME 04901 USA

[15] Univ Portsmouth, Inst Cosmol & Gravitat, Burnaby, BC PO1 3FX, Canada

[16] Natl Opt Astron Observ, Tucson, AZ 85719 USA

来源：

ASTRONOMICAL JOURNAL | 2015年 / 149卷 / 06期

基金：

美国国家科学基金会;

关键词：

catalogs; galaxies: high-redshift; techniques: spectroscopic; HUBBLE-SPACE-TELESCOPE; ORIGINS DEEP SURVEY; EXTRAGALACTIC LEGACY SURVEY; STAR-FORMING GALAXIES; GREATER-THAN; PHOTOMETRIC REDSHIFT; OPTICAL SPECTROSCOPY; QUIESCENT GALAXIES; NUCLEAR ACTIVITY; DATA REDUCTION;

D O I：

10.1088/0004-6256/149/6/178

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We combine Hubble Space Telescope (HST)/Wide Field Camera3 (WFC3) imaging and G141 grism observations from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) and 3D-HST surveys to produce a catalog of grism spectroscopic redshifts for galaxies in the CANDELS/GOODS-South field. The WFC3/G141 grism spectra cover a wavelength range of 1.1 <= lambda <= 1.7 mu m with a resolving power of R similar to 130 for point sources, thus providing rest-frame optical spectra for galaxies out to z similar to 3.5. The catalog is selected in the H-band (F160W) and includes both galaxies with and without previously published spectroscopic redshifts. Grism spectra are extracted for all H-band detected galaxies with H <= 24 and a CANDELS photometric redshift z(phot) >= 0.6. The resulting spectra are visually inspected to identify emission lines, and redshifts are determined using cross-correlation with empirical spectral templates. To establish the accuracy of our redshifts, we compare our results against high-quality spectroscopic redshifts from the literature. Using a sample of 411 control galaxies, this analysis yields a precision of sigma(NMAD) = 0.0028 for the grism-derived redshifts, which is consistent with the accuracy reported by the 3D-HST team. Our final catalog covers an area of 153 arcmin(2) and contains 1019 redshifts for galaxies in GOODS-S. Roughly 60% (608/1019) of these redshifts are for galaxies with no previously published spectroscopic redshift. These new redshifts span a range of 0.677 <= z <= 3.456 and have a median redshift of z = 1.282. The catalog contains a total of 234 new redshifts for galaxies at z > 1.5. In addition, we present 20 galaxy pair candidates identified for the first time using the grism redshifts in our catalog, including four new galaxy pairs at z similar to 2, nearly doubling the number of such pairs previously identified.

引用

页数：10

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