Molecular gas and star formation in ARP 302
文献类型：期刊论文
| 作者 | Ao, Yiping1 ; Dinh-V-Trung2; Lim, Jeremy2; Yang, Ji1; Matsushita, Satoki2
|
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2008-09-01 |
| 卷号 | 136期号:3页码:1118-1126 |
| 关键词 | galaxies : individual (ARP 302) galaxies : interactions galaxies : ISM galaxies : starburst infrared : galaxies |
| ISSN号 | 0004-6256 |
| 英文摘要 | We present the Submillimeter Array (SMA) observation of the CO J = 2-1 transition toward the northern galaxy, ARP 302N, of the early merging system, ARP 302. Our high angular resolution observation reveals the extended spatial distribution of the molecular gas in ARP 302N. We find that the molecular gas has a very asymmetric distribution with two strong concentrations on either side of the center together with a weaker one offset by about 8 kpc to the north. The molecular gas distribution is also found to be consistent with that from the hot dust as traced by the 24 mu m continuum emission observed by Spitzer. The line ratio of CO J = 2-1/1-0 is found to vary strongly from about 0.7 near the galaxy center to 0.4 in the outer part of the galaxy. Excitation analysis suggests that the gas density is low, less than 103 cm(-3), over the entire galaxy. By fitting the spectral energy distribution of ARP 302N in the far infrared we obtain a dust temperature of T(d) = 26-36 K and a dust mass of M(dust) = 2.0-3.6 x 10(8) M(circle dot). The spectral index of the radio continuum is around 0.9. The spatial distribution and spectral index of the radio continuum emission suggest that most of the radio continuum emission is synchrotron emission from the star-forming regions at the nucleus and ARP 302N-cm. The good spatial correspondence between the 3.6 cm radio continuum emission, the Spitzer 8 and 24 mu m data and the high-resolution CO J = 2-1 observation from the SMA shows that there is asymmetrical star-forming activity in ARP 302N. |
| 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] | ULTRALUMINOUS INFRARED GALAXIES ; INTERFEROMETRIC OBSERVATIONS ; SUBMILLIMETER ARRAY ; RADIO-CONTINUUM ; CO ; MERGERS ; STARBURSTS ; NUCLEAR ; KINEMATICS ; EXCITATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000258477800020 |
| 公开日期 | 2011-12-29 |
| 源URL | [http://159.226.72.40/handle/332002/1839]  |
| 专题 | 紫金山天文台_分子云与恒星形成研究团组 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan |
| 推荐引用方式 GB/T 7714 | Ao, Yiping,Dinh-V-Trung,Lim, Jeremy,et al. Molecular gas and star formation in ARP 302[J]. ASTRONOMICAL JOURNAL,2008,136(3):1118-1126. |
| APA | Ao, Yiping,Dinh-V-Trung,Lim, Jeremy,Yang, Ji,&Matsushita, Satoki.(2008).Molecular gas and star formation in ARP 302.ASTRONOMICAL JOURNAL,136(3),1118-1126. |
| MLA | Ao, Yiping,et al."Molecular gas and star formation in ARP 302".ASTRONOMICAL JOURNAL 136.3(2008):1118-1126. |
入库方式： OAI收割
来源：紫金山天文台
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