Estimating the Molecular Gas Mass of Low-redshift Galaxies from a Combination of Mid-infrared Luminosity and Optical Properties
文献类型：期刊论文
| 作者 | Gao, Yang15,16; Xiao, Ting14,16; Li, Cheng13; Jiang, Xue-Jian11,12; Tan, Qing-Hua11,12; Gao, Yu11,12; Wilson, Christine D.10; Bureau, Martin7,8,9; Saintonge, Amelie6; Sanchez-Gallego, Jose R.5 |
| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2019-12-20 |
| 卷号 | 887期号:2页码:18 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab557c |
| 通讯作者 | Gao, Yang(gaoyang@shao.ac.cn) ; Xiao, Ting(xiaoting@zju.edu.cn) |
| 英文摘要 | We present CO (J = 1-0) and/or CO (J = 2-1) spectroscopy for 31 galaxies selected from the ongoing Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, obtained with multiple telescopes. This sample is combined with CO observations from the literature to study the correlation of the CO luminosities (LCO(1-0)) with the mid-infrared luminosities at 12 (L-12 mu m) and 22 mu m (L-22 mu m), as well as the dependence of the residuals on a variety of galaxy properties. The correlation with L12 mm is tighter and more linear, but galaxies with relatively low stellar masses (M* less than or similar to 10(10) M-circle dot) and blue colors (g - r less than or similar to 0.5 and/or NUV - r less than or similar to 3) fall significantly below the mean LCO(1-0)-L-12 mu m relation. We propose a new estimator of the CO (1-0) luminosity (and thus the total molecular gas mass M-mol) that is a linear combination of three parameters: L-12 mu m, M*, and g - r. We show that, with a scatter of only 0.18 dex in log (LCO(1-0)), this estimator provides unbiased estimates for galaxies of different properties and types. An immediate application of this estimator to a compiled sample of galaxies with only CO (J.=. 2-1) observations yields a distribution of the CO (J.=.2-1) to CO (J.=.1-0) luminosity ratios (R21) that agrees well with the distribution of real observations, in terms of both the median and the shape. Application of our estimator to the current MaNGA sample reveals a gas-poor population of galaxies that are predominantly early-type and show no correlation between molecular gas-to-stellar mass ratio and star formation rate, in contrast to gas-rich galaxies. We also provide alternative estimators with similar scatters, based on r- and/or z-band luminosities instead of M*. These estimators serve as cheap and convenient M-mol proxies to be potentially applied to large samples of galaxies, thus allowing statistical studies of gas-related processes of galaxies. |
| WOS关键词 | STAR-FORMING GALAXIES ; NEARBY GALAXIES ; METALLICITY RELATION ; LEGACY SURVEY ; STELLAR MASS ; DUST ; CO ; CATALOG ; FRACTIONS ; EVOLUTION |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000506012000066 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/35433]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Gao, Yang; Xiao, Ting |
| 作者单位 | 1.Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, S Glam, Wales 2.Acad Sinica, Inst Astron & Astrophys, AS NTU Astron Math Bldg,1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan 3.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea 4.Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA 5.Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA 6.UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England 7.Yonsei Univ, Dept Astron, 50 Yonsei Ro, Seoul 03722, South Korea 8.Yonsei Univ, Yonsei Frontier Lab, 50 Yonsei Ro, Seoul 03722, South Korea 9.Univ Oxford, Subdept Astrophys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England 10.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada |
| 推荐引用方式 GB/T 7714 | Gao, Yang,Xiao, Ting,Li, Cheng,et al. Estimating the Molecular Gas Mass of Low-redshift Galaxies from a Combination of Mid-infrared Luminosity and Optical Properties[J]. ASTROPHYSICAL JOURNAL,2019,887(2):18. |
| APA | Gao, Yang.,Xiao, Ting.,Li, Cheng.,Jiang, Xue-Jian.,Tan, Qing-Hua.,...&Williams, Thomas G..(2019).Estimating the Molecular Gas Mass of Low-redshift Galaxies from a Combination of Mid-infrared Luminosity and Optical Properties.ASTROPHYSICAL JOURNAL,887(2),18. |
| MLA | Gao, Yang,et al."Estimating the Molecular Gas Mass of Low-redshift Galaxies from a Combination of Mid-infrared Luminosity and Optical Properties".ASTROPHYSICAL JOURNAL 887.2(2019):18. |
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来源：紫金山天文台
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