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HISTORY OF GALAXY INTERACTIONS AND THEIR IMPACT ON STAR FORMATION OVER THE LAST 7 Gyr FROM GEMS
文献类型：期刊论文
| 作者 | Jogee, Shardha1; Miller, Sarah H.1,2; Penner, Kyle1,3; Skelton, Rosalind E.4; Conselice, Christopher J.5; Somerville, Rachel S.4; Bell, Eric F.4; Zheng, Xian Zhong6; Rix, Hans-Walter4; Robaina, Aday R.4 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2009-06-01 |
| 卷号 | 697期号:2页码:1971-1992 |
| ISSN号 | 0004-637X |
| 关键词 | galaxies: evolution galaxies: fundamental parameters galaxies: kinematics and dynamics galaxies: structure |
| 英文摘要 | We perform a comprehensive estimate of the frequency of galaxy mergers and their impact on star formation over z similar to 0.24-0.80 (lookback time T(b) similar to 3-7 Gyr) using similar to 3600 (M >= 1 x 10(9) M(circle dot)) galaxies with GEMS Hubble Space Telescope, COMBO-17, and Spitzer data. Our results are as follows. (1) Among similar to 790 high-mass (M >= 2.5 x 10(10) M(circle dot)) galaxies, the visually based merger fraction over z similar to 0.24-0.80, ranges from 9% +/- 5% to 8% +/- 2%. Lower limits on the major merger and minor merger fraction over this interval range from 1.1% to 3.5%, and 3.6% to 7.5%, respectively. This is the first, albeit approximate, empirical estimate of the frequency of minor mergers over the last 7 Gyr. Assuming a visibility timescale of similar to 0.5 Gyr, it follows that over T(b) similar to 3-7 Gyr, similar to 68% of high-mass systems have undergone a merger of mass ratio > 1/10, with similar to 16%, 45%, and 7% of these corresponding respectively to major, minor, and ambiguous "major or minor" mergers. The average merger rate is similar to a few x 10(-4) galaxies Gyr(-1) Mpc(-3). Among similar to 2840 blue-cloud galaxies of mass M >= 1.0 x 10(9) M(circle dot), similar results hold. (2) We compare the empirical merger fraction and merger rate for high-mass galaxies to three. cold dark matter-based models: halo occupation distribution models, semi-analytic models, and hydrodynamic SPH simulations. We find qualitative agreement between observations and models such that the (major+minor) merger fraction or rate from different models bracket the observations, and show a factor of 5 dispersion. Near-future improvements can now start to rule out certain merger scenarios. (3) Among similar to 3698 M >= 1.0 x 10(9) M(circle dot) galaxies, we find that the mean star formation rate (SFR) of visibly merging systems is only modestly enhanced compared to non-interacting galaxies over z similar to 0.24-0.80. Visibly merging systems only account for a small fraction (< 30%) of the cosmic SFR density over T(b) similar to 3-7 Gyr. This complements the results of Wolf et al. over a shorter time interval of T(b) similar to 6.2-6.8 Gyr, and suggests that the behavior of the cosmic SFR density over the last 7 Gyr is predominantly shaped by non-interacting galaxies. |
| 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] | DEEP-FIELD-SOUTH ; DARK-MATTER HALOES ; MULTIBAND IMAGING PHOTOMETER ; ACTIVE GALACTIC NUCLEI ; FRANCE REDSHIFT SURVEY ; POINT-SOURCE CATALOGS ; INITIAL MASS FUNCTION ; ELLIPTIC GALAXIES ; FORMATION RATES ; STELLAR MASS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000266159500080 |
| 公开日期 | 2011-12-08 |
| 源URL | [http://159.226.72.40/handle/332002/1587]  |
| 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.Univ Texas Austin, Dept Astron, Austin, TX 78712 USA 2.Univ Oxford, Oxford OX1 3RH, England 3.Univ Arizona, Dept Astron, Steward Observ, Tucson, AZ 85721 USA 4.Max Planck Inst Astron, D-69117 Heidelberg, Germany 5.Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England 6.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 7.Ecole Polytech Fed Lausanne, Astrophys Lab, CH-1290 Sauverny, Switzerland 8.Univ Innsbruck, Inst Astro & Particle Phys, A-6020 Innsbruck, Austria 9.Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA 10.Univ Texas McDonald Observ, Ft Davis, TX 79734 USA |
| 推荐引用方式 GB/T 7714 | Jogee, Shardha,Miller, Sarah H.,Penner, Kyle,et al. HISTORY OF GALAXY INTERACTIONS AND THEIR IMPACT ON STAR FORMATION OVER THE LAST 7 Gyr FROM GEMS[J]. ASTROPHYSICAL JOURNAL,2009,697(2):1971-1992. |
| APA | Jogee, Shardha.,Miller, Sarah H..,Penner, Kyle.,Skelton, Rosalind E..,Conselice, Christopher J..,...&Papovich, Casey.(2009).HISTORY OF GALAXY INTERACTIONS AND THEIR IMPACT ON STAR FORMATION OVER THE LAST 7 Gyr FROM GEMS.ASTROPHYSICAL JOURNAL,697(2),1971-1992. |
| MLA | Jogee, Shardha,et al."HISTORY OF GALAXY INTERACTIONS AND THEIR IMPACT ON STAR FORMATION OVER THE LAST 7 Gyr FROM GEMS".ASTROPHYSICAL JOURNAL 697.2(2009):1971-1992. |
入库方式： OAI收割
来源：紫金山天文台
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