LOCAL BENCHMARKS FOR THE EVOLUTION OF MAJOR-MERGER GALAXIES-SPITZER OBSERVATIONS OF A K-BAND SELECTED SAMPLE
文献类型：期刊论文
| 作者 | Xu, C. Kevin1; Domingue, Donovan2; Cheng, Yi-Wen1,3,4,5; Lu, Nanyao1; Huang, Jiasheng6; Gao, Yu7 ; Mazzarella, Joseph M.1; Cutri, Roc1; Sun, Wei-Hsin4,5; Surace, Jason8
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2010-04-10 |
| 卷号 | 713期号:1页码:330-355 |
| 关键词 | galaxies: evolution galaxies: general galaxies: interactions galaxies: starburst |
| ISSN号 | 0004-637X |
| 英文摘要 | We present Spitzer observations for a sample of close major-merger galaxy pairs (KPAIR sample) selected from cross-matches between the Two Micron All Sky Survey and Sloan Digital Sky Survey Data Release 3. The goals are to study the star formation activity in these galaxies and to set a local bench mark for the cosmic evolution of close major mergers. The Spitzer KPAIR sample (27 pairs, 54 galaxies) includes all spectroscopically confirmed spiral-spiral (S+S) and spiral-elliptical (S+E) pairs in a parent sample that is complete for primaries brighter than K = 12.5 mag, projected separations of 5 h(-1) kpc <= s <= 20 h(-1) kpc, and mass ratios <= 2.5. The Spitzer data, consisting of images in seven bands (3.6, 4.5, 5.8, 8, 24, 70, 160 mu m), show very diversified IR emission properties. Compared to single spiral galaxies in a control sample, only spiral galaxies in S+S pairs show significantly enhanced specific star formation rate (sSFR = SFR/M), whereas spiral galaxies in S+E pairs do not. Furthermore, the SFR enhancement of spiral galaxies in S+S pairs is highly mass-dependent. Only those with M greater than or similar to 10(10.5) M-circle dot show significant enhancement. Relatively low-mass (M similar to 10(10) M circle dot) spirals in S+S pairs have about the same SFR/M compared to their counterparts in the control sample, while those with 10(11) M-circle dot have on average a similar to 3 times higher SFR/M than single spirals. There is evidence for a correlation between the global star formation activities (but not the nuclear activities) of the component galaxies in massive S+S major-merger pairs (the "Holmberg effect"). There is no significant difference in the SFR/M between the primaries and the secondaries, nor between spirals of SEP < 1 and those of SEP >= 1, SEP being the normalized separation parameter. The contribution of KPAIR galaxies to the cosmic SFR density in the local universe is only 1.7%, and amounts (rho) over dot(KPAIR) = 2.54 x 10(-4) (M-circle dot yr(-1) Mpc(-3)). |
| 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] | DIGITAL SKY SURVEY ; STAR-FORMING GALAXIES ; MULTIBAND IMAGING PHOTOMETER ; LUMINOUS INFRARED GALAXIES ; FRANCE REDSHIFT SURVEY ; 24 MU-M ; SPACE-TELESCOPE ; FIELD GALAXIES ; CLOSE PAIRS ; INTERACTING GALAXIES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000275918500029 |
| 公开日期 | 2011-11-23 |
| 源URL | [http://159.226.72.40/handle/332002/1129]  |
| 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.CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA 2.Georgia Coll & State Univ, Milledgeville, GA 31061 USA 3.Natl Cent Univ, Inst Astron, Chungli 32054, Taiwan 4.Natl Taiwan Univ, Inst Astrophys, Taipei 10617, Taiwan 5.Natl Taiwan Univ, Leung Ctr Cosmol & Particle Astrophys, Taipei 10617, Taiwan 6.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 7.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 8.CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA |
| 推荐引用方式 GB/T 7714 | Xu, C. Kevin,Domingue, Donovan,Cheng, Yi-Wen,et al. LOCAL BENCHMARKS FOR THE EVOLUTION OF MAJOR-MERGER GALAXIES-SPITZER OBSERVATIONS OF A K-BAND SELECTED SAMPLE[J]. ASTROPHYSICAL JOURNAL,2010,713(1):330-355. |
| APA | Xu, C. Kevin.,Domingue, Donovan.,Cheng, Yi-Wen.,Lu, Nanyao.,Huang, Jiasheng.,...&Surace, Jason.(2010).LOCAL BENCHMARKS FOR THE EVOLUTION OF MAJOR-MERGER GALAXIES-SPITZER OBSERVATIONS OF A K-BAND SELECTED SAMPLE.ASTROPHYSICAL JOURNAL,713(1),330-355. |
| MLA | Xu, C. Kevin,et al."LOCAL BENCHMARKS FOR THE EVOLUTION OF MAJOR-MERGER GALAXIES-SPITZER OBSERVATIONS OF A K-BAND SELECTED SAMPLE".ASTROPHYSICAL JOURNAL 713.1(2010):330-355. |
入库方式： OAI收割
来源：紫金山天文台
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