The JCMT Nearby Galaxies Legacy Survey - VIII. CO data and the LCO(3-2)-LFIR correlation in the SINGS sample
文献类型：期刊论文
| 作者 | Wilson, C. D.1; Warren, B. E.1,2; Israel, F. P.3; Serjeant, S.4; Attewell, D.1; Bendo, G. J.5; Butner, H. M.6; Chanial, P.7; Clements, D. L.8; Golding, J.1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2012-08-01 |
| 卷号 | 424期号:4页码:3050-3080 |
| 关键词 | stars: formation ISM: molecules galaxies: ISM galaxies: kinematics and dynamics galaxies: spiral |
| 英文摘要 | The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey (NGLS) comprises an H?i-selected sample of 155 galaxies spanning all morphological types with distances less than 25?Mpc. We describe the scientific goals of the survey, the sample selection and the observing strategy. We also present an atlas and analysis of the CO J=3 - 2 maps for the 47 galaxies in the NGLS which are also part of the Spitzer Infrared Nearby Galaxies Survey. We find a wide range of molecular gas mass fractions in the galaxies in this sample and explore the correlation of the far-infrared luminosity, which traces star formation, with the CO luminosity, which traces the molecular gas mass. By comparing the NGLS data with merging galaxies at low and high redshift, which have also been observed in the CO J=3 - 2 line, we show that the correlation of far-infrared and CO luminosity shows a significant trend with luminosity. This trend is consistent with a molecular gas depletion time which is more than an order of magnitude faster in the merger galaxies than in nearby normal galaxies. We also find a strong correlation of the LFIR/LCO(3-2) ratio with the atomic-to-molecular gas mass ratio. This correlation suggests that some of the far-infrared emission originates from dust associated with atomic gas and that its contribution is particularly important in galaxies where most of the gas is in the atomic phase. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000307385100052 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6265]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada 2.Univ Western Australia, Int Ctr Radio Astron Res, Crawley, WA 6009, Australia 3.Leiden Univ, Sterrewacht Leiden, NL-2300 RA Leiden, Netherlands 4.Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England 5.Univ Manchester, UK ALMA Reg Ctr Node, Jodrell Bank Ctr Astrophys, Sch Phys & Astron, Manchester M13 9PL, Lancs, England 6.James Madison Univ, Dept Phys & Astron, Harrisonburg, VA 22807 USA 7.Univ Paris Diderot, Lab AIM Paris Saclay, CEA DSM Irfu, CNRS,CE Saclay, F-91191 Gif Sur Yvette, France 8.Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2AZ, England 9.Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England 10.Queens Univ, Dept Phys Engn Phys & Astron, Kingston, ON K7L 3N6, Canada |
| 推荐引用方式 GB/T 7714 | Wilson, C. D.,Warren, B. E.,Israel, F. P.,et al. The JCMT Nearby Galaxies Legacy Survey - VIII. CO data and the LCO(3-2)-LFIR correlation in the SINGS sample[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,424(4):3050-3080. |
| APA | Wilson, C. D..,Warren, B. E..,Israel, F. P..,Serjeant, S..,Attewell, D..,...&White, G. J..(2012).The JCMT Nearby Galaxies Legacy Survey - VIII. CO data and the LCO(3-2)-LFIR correlation in the SINGS sample.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,424(4),3050-3080. |
| MLA | Wilson, C. D.,et al."The JCMT Nearby Galaxies Legacy Survey - VIII. CO data and the LCO(3-2)-LFIR correlation in the SINGS sample".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 424.4(2012):3050-3080. |
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来源：国家天文台
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