中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(9) ：174-196.DOI:10.1007/s11433-023-2387-2

The ALMaQUEST Survey XV:The dependence of the molecular-to-atomic gas ratios on resolved optical diagnostics

Niankun Yu Zheng Zheng Chao-Wei Tsai Pei Zuo Sara L.Ellison David V.Stark Di Li Jingwen Wu Karen L.Masters Ting Xiao Yinghui Zheng Zongnan Li Kai Zhang Hongying Chen Shu Liu Sihan Jiao Fanyi Meng
中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(9) ：174-196.DOI:10.1007/s11433-023-2387-2
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  • 万方数据

The ALMaQUEST Survey XV:The dependence of the molecular-to-atomic gas ratios on resolved optical diagnostics

Niankun Yu 1Zheng Zheng 1Chao-Wei Tsai 2Pei Zuo 1Sara L.Ellison 3David V.Stark 4Di Li 5Jingwen Wu 6Karen L.Masters 7Ting Xiao 8Yinghui Zheng 9Zongnan Li 1Kai Zhang 1Hongying Chen 1Shu Liu 1Sihan Jiao 1Fanyi Meng6
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作者信息

  • 1. National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;Key Laboratory of Radio Astronomy and Technology,Chinese Academy of Sciences,Beijing 100101,China
  • 2. National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;Key Laboratory of Radio Astronomy and Technology,Chinese Academy of Sciences,Beijing 100101,China;Institute for Frontiers in Astronomy and Astrophysics,Beijing Normal University,Beijing 102206,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China
  • 3. Department of Physics & Astronomy,University of Victoria,Victoria,V8P 1A1,Canada
  • 4. Departments of Physics and Astronomy,Haverford College,Haverford,19041,USA;Space Telescope Science Institute,San Martin Dr.,Baltimore 21218,USA
  • 5. National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;Key Laboratory of Radio Astronomy and Technology,Chinese Academy of Sciences,Beijing 100101,China;Zhejiang Laboratory,Hangzhou 311121,China;New Cornerstone Science Laboratory,Shenzhen 518054,China
  • 6. School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China;National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;Key Laboratory of Radio Astronomy and Technology,Chinese Academy of Sciences,Beijing 100101,China
  • 7. Departments of Physics and Astronomy,Haverford College,Haverford,19041,USA
  • 8. School of Physics,Zhejiang University,Hangzhou 310058,China
  • 9. National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;Key Laboratory of Radio Astronomy and Technology,Chinese Academy of Sciences,Beijing 100101,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China
  • 折叠

Abstract

The atomic-to-molecular gas conversion is a critical step in the baryon cycle of galaxies,which sets the initial conditions for sub-sequent star formation and influences the multi-phase interstellar medium.We compiled a sample of 94 nearby galaxies with observations of multi-phase gas contents by utilizing public H Ⅰ,CO,and optical IFU data from the MaNGA survey together with new FAST H Ⅰ observations.In agreement with previous results,our sample shows that the global molecular-to-atomic gas ratio(Rmol=log MH2/MHⅠ)is correlated with the global stellar mass surface density μ*with a Kendall's τ coefficient of 0.25 and p＜10-3,less tightly but still correlated with stellar mass and NUV-r color,and not related to the specific star formation rate(sSFR).The cold gas distribution and kinematics inferred from the HⅠ and CO global profile asymmetry and shape do not significantly rely on Rmol.Thanks to the availability of kpc-scale observations of MaNGA,we decompose galaxies into HⅡ,composite,and AGN-dominated regions by using the BPT diagrams.With increasing Rmol,the fraction of HⅡ regions within 1.5 effective radius decreases slightly;the density distribution in the spatially resolved BPT diagram also changes significantly,suggesting changes in metallicity and ionization states.Galaxies with high Rmol tend to have high oxygen abundance,both at one effective radius with a Kendall's τ coefficient of 0.37(p＜10-3)and their central regions.Among all parameters investigated here,the oxygen abundance at one effective radius has the strongest relation with global Rmol.The dependence of gas conversion on gas distribution and galaxy ionization states is weak.In contrast,the observed positive relation between oxygen abundance(μ*)and Rmol indicates that the gas conversion is efficient in regions of high metallicity(density).

Key words

Galaxies/baryon cycle/radio lines/H Ⅰ 21 cm/atomic-to-molecular gas conversion

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基金项目

National Natural Science Foundation of China(11988101)

National Natural Science Foundation of China(11973051)

National Natural Science Foundation of China(12041302)

National Natural Science Foundation of China(12373012)

National Natural Science Foundation of China(11903003)

National Natural Science Foundation of China(U1931110)

China Postdoctoral Science Foundation(2022M723175)

China Postdoctoral Science Foundation(GZB20230766)

International Partnership Program of Chinese Academy of Sciences(114A11KYSB20210010)

National Key Research and Program of China(2023YFE0110500)

National Key Research and Program of China(2023YFA1608004)

National Key Research and Program of China(2023YFC2206403)

Ministry of Science and Technology of China(2022YFA1605300)

Young Researcher Grant of Institutional Center for Shared Technologies and Facilities of National Astronomical Observatories()

National Natural Science Foundation of China(11973030)

fellowship of China National Postdoctoral Program for Innovation Talents(BX20220301)

project funded by China Postdoctoral Science Foundation(2021M703236)

National Aeronautics and Space Administration()

California Institute of Technology()

出版年

2024
中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
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