Herschel Spectroscopy of the Taffy Galaxies (UGC 12914/12915 = VV 254): Enhanced [C ii] Emission in the Collisionally Formed Bridge
文献类型：期刊论文
| 作者 | Peterson,B. W.2; Appleton,P. N.3; Bitsakis,T.4; Guillard,P.5; Alatalo,K.1,6; Boulanger,F.7; Cluver,M.8; Duc,P.-A.9; Falgarone,E.7; Gallagher,S.10 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2018-03-16 |
| 卷号 | 855期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | galaxies: individual (UGC 12914, UGC 12915) galaxies: interactions intergalactic medium |
| DOI | 10.3847/1538-4357/aaac2c |
| 英文摘要 | Abstract Using the PACS and SPIRE spectrometers on board Herschel, we obtained observations of the Taffy galaxies (UGC 12914/12915) and bridge. The Taffy system is believed to be the result of a face-on collision between two gas-rich galaxies, in which the stellar disks passed through each other, but the gas was dispersed into a massive H i and molecular bridge between them. Emission is detected and mapped in both galaxies and the bridge in the [C ii]157.7?μm and [O i]63.2?μm fine-structure lines. Additionally, SPIRE FTS spectroscopy detects the [C i] and [C i] neutral carbon lines, and weakly detects high-J CO transitions in the bridge. These results indicate that the bridge is composed of a warm multi-phase medium consistent with shock and turbulent heating. Despite low star formation rates in the bridge, the [C ii] emission appears to be enhanced, reaching [C ii]/FIR ratios of 3.3% in parts of the bridge. Both the [C ii] and [O i] lines show broad intrinsic multi-component profiles, similar to those seen in previous CO (1–0) and H i observations. The [C ii] emission shares similar line profiles with both the double-peaked H i profiles and shares a high-velocity component with single-peaked CO profiles in the bridge, suggesting that the [C ii] emission originates in both the neutral and molecular phases. We show that it is feasible that a combination of turbulently heated H2 and high column-density H i, resulting from the galaxy collision, is responsible for the enhanced [C ii] emission. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-855-2-AAAC2C |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/35653]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Space Telescope Science Institute, 3700, San Martin Drive, Baltimore, MD 21218, USA 2.University of Wisconsin—Barron County, 1800 College Drive, Rice Lake, WI 54868, USA; bradley.peterson@uwc.edu 3.Caltech/IPAC, MC 100-22, 1200 E. California Boulevard, Pasadena, CA 91125, USA; apple@ipac.caltech.edu 4.Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Morelia, 58089, Mexico 5.Sorbonne Université, CNRS, UMR 7095, Institut d’Astrophysique de Paris, 98 bis Bd Arago, F-75014 Paris, France 6.Carnegie Observatories, Carnegie Institute of Washington, Pasadena, CA, USA 7.Observatoire de Paris, Université PSL, Sorbonne Université, Ecole normale supérieure, CNRS, LERMA, F-75005, Paris, France 8.Department of Physics and Astronomy, University of the Western Cape, Robert Sobukwe Road, Bellville, 7535, South Africa 9.Université de Strasbourg, CNRS, Observatoire astronomique de Strasbourg, UMR 7550, F-67000 Strasbourg, France 10.Department of Physics and Astronomy, University of Western Ontario, London, ON, N6A 3K7, Canada |
| 推荐引用方式 GB/T 7714 | Peterson,B. W.,Appleton,P. N.,Bitsakis,T.,et al. Herschel Spectroscopy of the Taffy Galaxies (UGC 12914/12915 = VV 254): Enhanced [C ii] Emission in the Collisionally Formed Bridge[J]. The Astrophysical Journal,2018,855(2). |
| APA | Peterson,B. W..,Appleton,P. N..,Bitsakis,T..,Guillard,P..,Alatalo,K..,...&Xu,C. K..(2018).Herschel Spectroscopy of the Taffy Galaxies (UGC 12914/12915 = VV 254): Enhanced [C ii] Emission in the Collisionally Formed Bridge.The Astrophysical Journal,855(2). |
| MLA | Peterson,B. W.,et al."Herschel Spectroscopy of the Taffy Galaxies (UGC 12914/12915 = VV 254): Enhanced [C ii] Emission in the Collisionally Formed Bridge".The Astrophysical Journal 855.2(2018). |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。