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| CO observations towards a sample of nearby galaxies | |
Li, Fa-Cheng1,2,3; Wu, Yuan-Wei1,2; Xu, Ye1,2
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| 2015-06-01 | |
| Source Publication | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| Volume | 15Issue:6Pages:785-801 |
| Abstract | We have simultaneously observed (CO)-C-12, (CO)-C-13 and (CO)-O-18 (J = 1 - 0) rotational transitions in the centers of a sample of 58 nearby spiral galaxies using the 13.7-m millimeter-wave telescope administered by Purple Mountain Observatory. Forty-two galaxies were detected in (CO)-C-13 emission, but there was a null detection for (CO)-O-18 emission with a sigma upper limit of 2 mK. The central beam ratios, R, of (CO)-C-12 and (CO)-C-13 range mostly from 5 to 13, with an average value of 8.1 +/- 4.2, which is slightly lower than previous estimates for normal galaxies. Clear correlations are found between (CO)-C-12 and (CO)-C-13 luminosities. An average X factor of 1.44 +/- 0.84 x 10(20) cm(-2) (K km s(-1))(-1) is slightly lower than that in the Milky Way. |
| Keyword | Galaxies: Ism Molecules: Galaxies Millimeter Lines: Ism Star Formation: Ism |
| Subject Area | 天文和天体物理 |
| WOS Headings | Science & Technology ; Physical Sciences |
| DOI | 10.1088/1674-4527/15/6/002 |
| WOS Keyword | STAR-FORMATION ; MOLECULAR GAS ; SPIRAL GALAXIES ; INFRARED GALAXIES ; CARBON-MONOXIDE ; (CO)-C-13 ; EMISSION ; CLOUDS ; LINE ; TELESCOPE |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000355138900002 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://libir.pmo.ac.cn/handle/332002/14904 |
| Collection | 紫金山天文台青海观测站 |
| Affiliation | 1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Fa-Cheng,Wu, Yuan-Wei,Xu, Ye. CO observations towards a sample of nearby galaxies[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(6):785-801. |
| APA | Li, Fa-Cheng,Wu, Yuan-Wei,&Xu, Ye.(2015).CO observations towards a sample of nearby galaxies.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(6),785-801. |
| MLA | Li, Fa-Cheng,et al."CO observations towards a sample of nearby galaxies".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.6(2015):785-801. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 2015058.pdf（441KB） | 开放获取 | Apache License | View Application Full Text | |||
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