PMO OpenIR
Estimating the Molecular Gas Mass of Low-redshift Galaxies from a Combination of Mid-infrared Luminosity and Optical Properties
Gao, Yang1,2; Xiao, Ting1,3; Li, Cheng4; Jiang, Xue-Jian5,6; Tan, Qing-Hua5,6; Gao, Yu5,6; Wilson, Christine D.7; Bureau, Martin8,9,10; Saintonge, Amelie11; Sanchez-Gallego, Jose R.12; Brown, Toby7; Clark, Christopher J. R.13; Hwang, Ho Seong14; Lamperti, Isabella11; Lin, Lin1; Liu, Lijie; Lu, Dengrong5,6; Pan, Hsi-An15; Sun, Jixian5,6; Williams, Thomas G.16
2019-12-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume887Issue:2Pages:18
Corresponding AuthorGao, Yang(gaoyang@shao.ac.cn) ; Xiao, Ting(xiaoting@zju.edu.cn)
AbstractWe 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.
DOI10.3847/1538-4357/ab557c
WOS KeywordSTAR-FORMING GALAXIES ; NEARBY GALAXIES ; METALLICITY RELATION ; LEGACY SURVEY ; STELLAR MASS ; DUST ; CO ; CATALOG ; FRACTIONS ; EVOLUTION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000506012000066
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/35434
Collection中国科学院紫金山天文台
Corresponding AuthorGao, Yang; Xiao, Ting
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Shanghai, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China
4.Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China
5.Chinese Acad Sci, Purple Mt Observ, Nanjing 210034, Peoples R China
6.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210034, Peoples R China
7.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada
8.Univ Oxford, Subdept Astrophys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England
9.Yonsei Univ, Yonsei Frontier Lab, 50 Yonsei Ro, Seoul 03722, South Korea
10.Yonsei Univ, Dept Astron, 50 Yonsei Ro, Seoul 03722, South Korea
11.UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
12.Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA
13.Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
14.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
15.Acad Sinica, Inst Astron & Astrophys, AS NTU Astron Math Bldg,1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan
16.Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, S Glam, Wales
Recommended Citation
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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