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.; Appleton, P. N.; Bitsakis, T.; Guillard, P.; Alatalo, K.; Boulanger, F.; Cluver, M.; Duc, P. -A.; Falgarone, E.; Gallagher, S. |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2018 |
| 卷号 | 855期号:2页码:141 |
| 英文摘要 | 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 mu m and [O I]63.2 mu m fine-structure lines. Additionally, SPIRE FTS spectroscopy detects the [C I] P-3(2) -> P-3(1)(809.3 GHz) and [C I] P-3(1) -> P-3(0)(492.2 GHz) 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 H-2 and high column-density H I, resulting from the galaxy collision, is responsible for the enhanced [C II] emission. |
| 语种 | 英语 |
| WOS记录号 | WOS:000427697100010 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/18069]  |
| 专题 | 中国科学院紫金山天文台 |
| 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]. ASTROPHYSICAL JOURNAL,2018,855(2):141. |
| 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.ASTROPHYSICAL JOURNAL,855(2),141. |
| 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".ASTROPHYSICAL JOURNAL 855.2(2018):141. |
入库方式： OAI收割
来源：紫金山天文台
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。