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OBSCURED STAR FORMATION IN INTERMEDIATE-DENSITY ENVIRONMENTS: A SPITZER STUDY OF THE ABELL 901/902 SUPERCLUSTER
文献类型：期刊论文
| 作者 | Gallazzi, Anna1; Bell, Eric F.1; Wolf, Christian2; Gray, Meghan E.3; Papovich, Casey4; Barden, Marco5; Peng, Chien Y.6; Meisenheimer, Klaus1; Heymans, Catherine7; van Kampen, Eelco5 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2009-01-10 |
| 卷号 | 690期号:2页码:1883-1900 |
| 关键词 | galaxies: evolution galaxies: general galaxies: stellar content |
| ISSN号 | 0004-637X |
| 英文摘要 | We explore the amount of obscured star formation as a function of environment in the Abell 901/902 (A901/902) supercluster at z = 0.165 in conjunction with a field sample drawn from the A901 and CDFS fields, imaged with the Hubble Space Telescope as part of the Space Telescope A901/902 Galaxy Evolution Survey and Galaxy Evolution from Morphology and Spectral Energy Distributions (SEDs) Survey. We combine the combo-17 near-UV/optical SED with Spitzer 24 mu m photometry to estimate both the unobscured and obscured star formation in galaxies with M(*) > 10(10) M(circle dot). We find that the star formation activity in massive galaxies is suppressed in dense environments, in agreement with previous studies. Yet, nearly 40% of the star-forming (SF) galaxies have red optical colors at intermediate and high densities. These red systems are not starbursting; they have star formation rates (SFRs) per unit stellar mass similar to or lower than blue SF galaxies. More than half of the red SF galaxies have low infrared-to-ultraviolet (IR-to-UV) luminosity ratios, relatively high Sersicindices, and they are equally abundant at all densities. They might be gradually quenching their star formation, possibly but not necessarily under the influence of gas-removing environmental processes. The other greater than or similar to 40% of the red SF galaxies have high IR-to-UV luminosity ratios, indicative of high dust obscuration. They have relatively high specific SFRs and are more abundant at intermediate densities. Our results indicate that while there is an overall suppression in the SF galaxy fraction with density, the small amount of star formation surviving the cluster environment is to a large extent obscured, suggesting that environmental interactions trigger a phase of obscured star formation, before complete quenching. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | HUBBLE-SPACE-TELESCOPE ; EARLY-TYPE GALAXIES ; SPECTRAL ENERGY-DISTRIBUTIONS ; ALPHA SURFACE PHOTOMETRY ; ACTIVE GALACTIC NUCLEI ; DIGITAL SKY SURVEY ; DARK-MATTER HALOS ; VIRGO CLUSTER ; SPIRAL GALAXIES ; STELLAR MASS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000262726900071 |
| 公开日期 | 2011-12-08 |
| 源URL | [http://159.226.72.40/handle/332002/1597]  |
| 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.Max Planck Inst Astron, D-69117 Heidelberg, Germany 2.Univ Oxford, Dept Phys, Oxford OX1 3RH, England 3.Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England 4.Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA 5.Univ Innsbruck, Inst Astro & Particle Phys, A-6020 Innsbruck, Austria 6.Herzberg Inst Astrophys, NRC, Victoria, BC V9E 2E7, Canada 7.Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada 8.European So Observ, Santiago 19, Chile 9.Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada 10.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA |
| 推荐引用方式 GB/T 7714 | Gallazzi, Anna,Bell, Eric F.,Wolf, Christian,et al. OBSCURED STAR FORMATION IN INTERMEDIATE-DENSITY ENVIRONMENTS: A SPITZER STUDY OF THE ABELL 901/902 SUPERCLUSTER[J]. ASTROPHYSICAL JOURNAL,2009,690(2):1883-1900. |
| APA | Gallazzi, Anna.,Bell, Eric F..,Wolf, Christian.,Gray, Meghan E..,Papovich, Casey.,...&Zheng, Xianzhong.(2009).OBSCURED STAR FORMATION IN INTERMEDIATE-DENSITY ENVIRONMENTS: A SPITZER STUDY OF THE ABELL 901/902 SUPERCLUSTER.ASTROPHYSICAL JOURNAL,690(2),1883-1900. |
| MLA | Gallazzi, Anna,et al."OBSCURED STAR FORMATION IN INTERMEDIATE-DENSITY ENVIRONMENTS: A SPITZER STUDY OF THE ABELL 901/902 SUPERCLUSTER".ASTROPHYSICAL JOURNAL 690.2(2009):1883-1900. |
入库方式： OAI收割
来源：紫金山天文台
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