FOUR IRAC SOURCES WITH AN EXTREMELY RED H - [3.6] COLOR: PASSIVE OR DUSTY GALAXIES AT z > 4.5?
文献类型：期刊论文
| 作者 | Huang, J. -S.1; Zheng, X. Z.2; Rigopoulou, D.3; Magdis, G.3; Fazio, G. G.1; Wang, T.1,4 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2011-11-20 |
| 卷号 | 742期号:1页码:L13(5) |
| ISSN号 | 2041-8205 |
| 关键词 | cosmology: observations galaxies: evolution galaxies: formation galaxies: high-redshift infrared: galaxies |
| 英文摘要 | We report the detection of four IRAC sources in the GOODS-South field with an extremely red color of H - [3.6] > 4.5. The four sources are not detected in the deep Hubble Space Telescope WFC3 H-band image with H-limit = 28.3 mag. We find that only three types of SED templates can produce such a red H -[3.6] color: a very dusty SED with the Calzetti extinction of A(V) = 16 mag at z = 0.8; a very dusty SED with the SMC extinction of AV = 8 mag at z = 2.0-2.2; and an 1 Gyr SSP with A(V) similar to 0.8 at z = 5.7. We argue that these sources are unlikely dusty galaxies at z <= 2.2 based on absent strong MIPS 24 mu m emission. The old stellar population model at z > 4.5 remains a possible solution for the 4 sources. At z > 4.5, these sources have stellar masses of log(M-*/M-circle dot) = 10.6-11.2. One source, ERS-1, is also a type-II X-ray QSO with L2-8 (keV) = 1.6 x 10(44) er gs(-1). One of the four sources is an X-ray QSO and another one is a HyperLIRG, suggesting a galaxy-merging scenario for the formation of these massive galaxies at high redshifts. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | NEAR-INFRARED OBSERVATIONS ; STAR-FORMING GALAXIES ; Z-SIMILAR-TO-6 QUASARS ; SPECTROSCOPY ; DEEP ; ULTRAVIOLET ; CONSTRAINTS ; POPULATION ; RESOLUTION ; OBJECTS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000296763600013 |
| 公开日期 | 2012-08-07 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/4527]  |
| 专题 | 紫金山天文台_星系中的恒星形成研究团组 |
| 作者单位 | 1.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 2.Acad Sinica, Purple Mt Observ, Nanjing 210008, Jiangsu Provinc, Peoples R China 3.Univ Oxford, Dept Phys, Oxford OX1 3RH, England 4.Nanjing Univ, Dept Astron, Nanjing 210008, Jiangsu Provinc, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, J. -S.,Zheng, X. Z.,Rigopoulou, D.,et al. FOUR IRAC SOURCES WITH AN EXTREMELY RED H - [3.6] COLOR: PASSIVE OR DUSTY GALAXIES AT z > 4.5?[J]. ASTROPHYSICAL JOURNAL LETTERS,2011,742(1):L13(5). |
| APA | Huang, J. -S.,Zheng, X. Z.,Rigopoulou, D.,Magdis, G.,Fazio, G. G.,&Wang, T..(2011).FOUR IRAC SOURCES WITH AN EXTREMELY RED H - [3.6] COLOR: PASSIVE OR DUSTY GALAXIES AT z > 4.5?.ASTROPHYSICAL JOURNAL LETTERS,742(1),L13(5). |
| MLA | Huang, J. -S.,et al."FOUR IRAC SOURCES WITH AN EXTREMELY RED H - [3.6] COLOR: PASSIVE OR DUSTY GALAXIES AT z > 4.5?".ASTROPHYSICAL JOURNAL LETTERS 742.1(2011):L13(5). |
入库方式： OAI收割
来源：紫金山天文台
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