A CENSUS OF STAR-FORMING GALAXIES IN THE Z ∼ 9-10 UNIVERSE BASED ON HST plus SPITZER OBSERVATIONS OVER 19 CLASH CLUSTERS: THREE CANDIDATE Z ∼ 9-10 GALAXIES AND IMPROVED CONSTRAINTS ON THE STAR FORMATION RATE DENSITY AT Z ∼ 9.2

被引：158

作者：

Bouwens, R. J. ^{[1
,2
]}

Bradley, L. ^{[3
]}

Zitrin, A. ^{[4
]}

Coe, D. ^{[3
]}

Franx, M. ^{[1
]}

Zheng, W. ^{[5
]}

Smit, R. ^{[1
]}

Host, O. ^{[6
]}

Postman, M. ^{[3
]}

Moustakas, L. ^{[7
]}

Labbe, I. ^{[1
]}

Carrasco, M. ^{[4
,8
]}

Molino, A. ^{[9
]}

Donahue, M. ^{[10
]}

Kelson, D. D. ^{[11
]}

Meneghetti, M. ^{[12
]}

Benitez, N.

Lemze, D. ^{[5
]}

Umetsu, K. ^{[13
]}

Broadhurst, T. ^{[14
]}

Moustakas, J. ^{[15
]}

Rosati, P. ^{[16
]}

Jouvel, S. ^{[17
]}

Bartelmann, M. ^{[4
]}

Ford, H. ^{[5
]}

Graves, G. ^{[18
]}

Grillo, C. ^{[6
]}

Infante, L. ^{[8
]}

Jimenez-Teja, Y. ^{[9
]}

Lahav, O. ^{[19
]}

Maoz, D. ^{[20
]}

Medezinski, E. ^{[5
]}

Melchior, P. ^{[21
]}

Merten, J. ^{[7
]}

Nonino, M. ^{[22
]}

Ogaz, S. ^{[3
]}

Seitz, S. ^{[23
]}

机构：

[1] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

[2] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA

[3] Space Telescope Sci Inst, Baltimore, MD 21208 USA

[4] Heidelberg Univ, D-69120 Heidelberg, Germany

[5] Johns Hopkins Univ, Baltimore, MD 21218 USA

[6] Univ Copenhagen, Dark Cosmol Ctr, Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[7] CALTECH, JPL, Pasadena, CA 91109 USA

[8] Catholic Univ Chile, Santiago 22, Chile

[9] Inst Astrofis Andalucia, Granada 18008, Spain

[10] Michigan State Univ, E Lansing, MI 48824 USA

[11] Carnegie Observ, Carnegie Inst Sci, Pasadena, CA 91101 USA

[12] Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy

[13] Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan

[14] Univ Basque Country, Bilbao 48080, Spain

[15] Siena Coll, Albany, NY 12211 USA

[16] European So Observ, D-85748 Garching, Germany

[17] Inst Ciencies Espai IEEC CSIC, Barcelona 08034, Spain

[18] Univ Calif Berkeley, Berkeley, CA 94720 USA

[19] UCL, London WC1E 6BT, England

[20] Tel Aviv Univ, IL-69978 Tel Aviv, Israel

[21] Ohio State Univ, Columbus, OH 43210 USA

[22] Osserv Astron Trieste, INAF, I-40131 Trieste, Italy

[23] Univ Sternwarte, D-81679 Munich, Germany

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 795卷 / 02期

关键词：

galaxies: evolution; galaxies: high-redshift; ULTRA-DEEP-FIELD; LYMAN-BREAK GALAXIES; HIGH-REDSHIFT GALAXIES; ULTRAVIOLET LUMINOSITY DENSITY; SPECTRAL ENERGY-DISTRIBUTIONS; EARLY RELEASE SCIENCE; EXTRAGALACTIC LEGACY SURVEY; EMISSION-LINE GALAXIES; STELLAR MASS DENSITY; GOODS-SOUTH FIELD;

D O I：

10.1088/0004-637X/795/2/126

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We utilize a two-color Lyman-break selection criterion to search for z similar to 9-10 galaxies over the first 19 clusters in the CLASH program. A systematic search yields three z similar to 9-10 candidates. While we have already reported the most robust of these candidates, MACS1149-JD, two additional z similar to 9 candidates are also found and have H-160- band magnitudes of similar to 26.2-26.9. A careful assessment of various sources of contamination suggests less than or similar to 1 contaminants for our z similar to 9-10 selection. To determine the implications of these search results for the luminosity function (LF) and star formation rate density at z similar to 9, we introduce a new differential approach to deriving these quantities in lensing fields. Our procedure is to derive the evolution by comparing the number of z similar to 9-10 galaxy candidates found in CLASH with the number of galaxies in a slightly lower-redshift sample (after correcting for the differences in selection volumes), here taken to be z similar to 8. This procedure takes advantage of the fact that the relative volumes available for the z similar to 8 and z similar to 9-10 selections behind lensing clusters are not greatly dependent on the details of the lensing models. We find that the normalization of the UV LF at z similar to 9 is just 0.28(-0.20)(+0.39) x that at z similar to 8, which is similar to 1.4(-0.8)(+3.0) x lower than extrapolating z similar to 4-8 LF results. While consistent with the evolution in the UV LF seen at z similar to 4-8, these results marginally favor a more rapid evolution at z > 8. Compared to similar evolutionary findings from the HUDF, our result is less insensitive to large-scale structure uncertainties, given our many independent sightlines on the high-redshift universe.

引用

页数：20

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