A CO(3-2) survey of a merging sequence of luminous infrared galaxies
文献类型：期刊论文
| 作者 | Leech, J.1; Isaak, K. G.2; Papadopoulos, P. P.3; Gao, Y.4 ; Davis, G. R.5
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2010-08-01 |
| 卷号 | 406期号:2页码:1364-1378 |
| 关键词 | ISM: molecules galaxies: interactions galaxies: ISM galaxies: starburst infrared: galaxies |
| ISSN号 | 0035-8711 |
| 英文摘要 | Luminous infrared galaxies (L(IR) > 10(11) L(circle dot)) are often associated with interacting galactic systems and are thought to be powered by merger-induced starbursts and/or dust-enshrouded active galactic nucleus. in such systems, the evolution of the dense, star-forming molecular gas as a function of merger separation is of particular interest. Here, we present observations of the CO(3-2) emission from a sample of luminous infrared galaxy mergers that span a range of galaxy-galaxy separations. The excitation of the molecular gas is studied by examining the CO(3-2)/CO( 1 -0) line ratio, r(31), as a function of merger extent. We find these line ratios, r(31), to be consistent with kinetic temperatures of T(k) = (30-50) K and gas densities of n(H2) = 10(3) cm(-3). We also find weak correlations between r(31) and both merger progression and star formation efficiency [L(FIR)/L(CO(1-0))]. These correlations show a tendency for gas excitation to increase as the merger progresses and the star formation efficiency rises. To conclude, we calculate the contributions of the CO(3-2) line to the 850-mu m fluxes measured with SCUBA (Submillimetre Common-User Bolometer Array), which are seen to be significant (similar to 22 per cent). |
| 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] | CLERK-MAXWELL-TELESCOPE ; MOLECULAR GAS ; NEARBY GALAXIES ; PHYSICAL CONDITIONS ; STARBURST GALAXIES ; STAR-FORMATION ; MAJOR MERGERS ; IRAS SURVEY ; DENSE GAS ; CO J=3-2 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000280710300053 |
| 公开日期 | 2011-11-23 |
| 源URL | [http://159.226.72.40/handle/332002/1119]  |
| 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.Univ Oxford, Dept Phys, Astrophys Grp, Oxford OX1 3RH, England 2.Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales 3.Argelander Inst Astron, D-53121 Bonn, Germany 4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 5.Joint Astron Ctr, Hilo, HI 96720 USA |
| 推荐引用方式 GB/T 7714 | Leech, J.,Isaak, K. G.,Papadopoulos, P. P.,et al. A CO(3-2) survey of a merging sequence of luminous infrared galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,406(2):1364-1378. |
| APA | Leech, J.,Isaak, K. G.,Papadopoulos, P. P.,Gao, Y.,&Davis, G. R..(2010).A CO(3-2) survey of a merging sequence of luminous infrared galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,406(2),1364-1378. |
| MLA | Leech, J.,et al."A CO(3-2) survey of a merging sequence of luminous infrared galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 406.2(2010):1364-1378. |
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来源：紫金山天文台
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