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EVOLUTION OF GALAXIES AND THEIR ENVIRONMENTS AT z=0.1-3 IN COSMOS
文献类型：期刊论文
| 作者 | Giavalisco, M.26; Yan, L.32; White, S. D. M.28; Taylor, J. E.9; Taniguchi, Y.22; Smolcic, V.7,10; Shopbell, P. L.7; Sheth, K.11; Schinnerer, E.12; Scarlata, C.13 |
| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| 出版日期 | 2013-05-01 |
| 卷号 | 206期号:1 |
| 关键词 | Galaxies: Evolution Large-scale Structure Of Universe |
| DOI | 10.1088/0067-0049/206/1/3 |
| 英文摘要 | Large-scale structures (LSSs) out to z < 3.0 are measured in the Cosmic Evolution Survey (COSMOS) using extremely accurate photometric redshifts (photoz). The K-s-band-selected sample (from Ultra-Vista) is comprised of 155,954 galaxies. Two techniques-adaptive smoothing and Voronoi tessellation-are used to estimate the environmental densities within 127 redshift slices. Approximately 250 statistically significant overdense structures are identified out to z = 3.0 with shapes varying from elongated filamentary structures to more circularly symmetric concentrations. We also compare the densities derived for COSMOS with those based on semi-analytic predictions for Lambda CDM simulation and find excellent overall agreement between the mean densities as a function of redshift and the range of densities. The galaxy properties (stellar mass, spectral energy distributions (SEDs), and star formation rates (SFRs)) are strongly correlated with environmental density and redshift, particularly at z < 1.0-1.2. Classifying the spectral type of each galaxy using the rest-frame b - i color (from the photoz SED fitting), we find a strong correlation of early-type galaxies (E-Sa) with high-density environments, while the degree of environmental segregation varies systematically with redshift out to z similar to 1.3. In the highest density regions, 80% of the galaxies are early types at z = 0.2 compared to only 20% at z = 1.5. The SFRs and the star formation timescales exhibit clear environmental correlations. At z > 0.8, the SFR density is uniformly distributed over all environmental density percentiles, while at lower redshifts the dominant contribution is shifted to galaxies in lower density environments. |
| 语种 | 英语 |
| WOS记录号 | WOS:000318556300003 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8896]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Univ Tokyo, Inst Phys & Math Universe, Kashiwa, Chiba 2778582, Japan 2.Osserv Astron Roma, INAF, I-00040 Pomezia, Italy 3.Carnegie Observ, Pasadena, CA USA 4.Univ Paris 07, CNRS, AIM Unite Mixte Rech CEA, UMR 158, Paris, France 5.Aix Marseille Univ, CNRS, Lab Astrophys Marseille, UMR 7326, F-13388 Marseille, France 6.Canada France Hawaii Telescope Corp, Kamuela, HI 96743 USA 7.CALTECH, Pasadena, CA 91125 USA 8.Amer Museum Nat Hist, Hayden Planetarium, New York, NY 10024 USA 9.Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada 10.Argelander Inst Astron, D-53121 Bonn, Germany |
| 推荐引用方式 GB/T 7714 | Giavalisco, M.,Yan, L.,White, S. D. M.,et al. EVOLUTION OF GALAXIES AND THEIR ENVIRONMENTS AT z=0.1-3 IN COSMOS[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2013,206(1). |
| APA | Giavalisco, M..,Yan, L..,White, S. D. M..,Taylor, J. E..,Taniguchi, Y..,...&Scoville, N..(2013).EVOLUTION OF GALAXIES AND THEIR ENVIRONMENTS AT z=0.1-3 IN COSMOS.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,206(1). |
| MLA | Giavalisco, M.,et al."EVOLUTION OF GALAXIES AND THEIR ENVIRONMENTS AT z=0.1-3 IN COSMOS".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 206.1(2013). |
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