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Title: What drives the velocity dispersion of ionized gas in star-forming galaxies?

Abstract

Abstract We analyse the intrinsic velocity dispersion properties of 648 star-forming galaxies observed by the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, to explore the relation of intrinsic gas velocity dispersions with star formation rates (SFRs), SFR surface densities ($$\rm {\Sigma _{SFR}}$$), stellar masses, and stellar mass surface densities ($$\rm {\Sigma _{*}}$$). By combining with high z galaxies, we found that there is a good correlation between the velocity dispersion and the SFR as well as $$\rm {\Sigma _{SFR}}$$. But the correlation between the velocity dispersion and the stellar mass as well as $$\rm {\Sigma _{*}}$$ is moderate. By comparing our results with predictions of theoretical models, we found that the energy feedback from star formation processes alone and the gravitational instability alone cannot fully explain simultaneously the observed velocity–dispersion/SFR and velocity–dispersion/$$\rm {\Sigma _{SFR}}$$ relationships.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [2];  [3]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [4]; ORCiD logo [5];  [6];  [1];  [7]
  1. School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China, Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210093, China
  2. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
  3. Apache Point Observatory and New Mexico State University, PO Box 59, Sunspot, NM 88349-0059, USA, Sternberg Astronomical Institute, Moscow State University, Moscow 119234, Russia
  4. Departamento de Física, CCNE, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil, Laboratório Interinstitucional de e-Astronomia, Rua General José Cristino, 77 Vasco da Gama, Rio de Janeiro 20921-400, Brazil
  5. Laboratório Interinstitucional de e-Astronomia, Rua General José Cristino, 77 Vasco da Gama, Rio de Janeiro 20921-400, Brazil, Departamento de Astronomia, Universidade Federal do Rio Grandedo Sul - Av. Bento Gonçalves 9500, Porto Alegre, RS, Brazil
  6. Department of Physics and Astronomy, University of Kentucky, 505 Rose Street, Lexington, KY 40506, USA
  7. Apache Point Observatory and New Mexico State University, PO Box 59, Sunspot, NM 88349-0059, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1511104
Resource Type:
Published Article
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 486 Journal Issue: 4; Journal ID: ISSN 0035-8711
Publisher:
Oxford University Press
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Yu, Xiaoling, Shi, Yong, Chen, Yanmei, Law, David R., Bizyaev, Dmitry, Bing, Longji, Li, Songlin, Zhou, Luwenjia, Chen, Jianhang, Riffel, Rogemar A., Riffel, Rogério, Zhang, Kai, Chen, Yongyun, and Pan, Kaike. What drives the velocity dispersion of ionized gas in star-forming galaxies?. United Kingdom: N. p., 2019. Web. doi:10.1093/mnras/stz1146.
Yu, Xiaoling, Shi, Yong, Chen, Yanmei, Law, David R., Bizyaev, Dmitry, Bing, Longji, Li, Songlin, Zhou, Luwenjia, Chen, Jianhang, Riffel, Rogemar A., Riffel, Rogério, Zhang, Kai, Chen, Yongyun, & Pan, Kaike. What drives the velocity dispersion of ionized gas in star-forming galaxies?. United Kingdom. doi:10.1093/mnras/stz1146.
Yu, Xiaoling, Shi, Yong, Chen, Yanmei, Law, David R., Bizyaev, Dmitry, Bing, Longji, Li, Songlin, Zhou, Luwenjia, Chen, Jianhang, Riffel, Rogemar A., Riffel, Rogério, Zhang, Kai, Chen, Yongyun, and Pan, Kaike. Fri . "What drives the velocity dispersion of ionized gas in star-forming galaxies?". United Kingdom. doi:10.1093/mnras/stz1146.
@article{osti_1511104,
title = {What drives the velocity dispersion of ionized gas in star-forming galaxies?},
author = {Yu, Xiaoling and Shi, Yong and Chen, Yanmei and Law, David R. and Bizyaev, Dmitry and Bing, Longji and Li, Songlin and Zhou, Luwenjia and Chen, Jianhang and Riffel, Rogemar A. and Riffel, Rogério and Zhang, Kai and Chen, Yongyun and Pan, Kaike},
abstractNote = {Abstract We analyse the intrinsic velocity dispersion properties of 648 star-forming galaxies observed by the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, to explore the relation of intrinsic gas velocity dispersions with star formation rates (SFRs), SFR surface densities ($\rm {\Sigma _{SFR}}$), stellar masses, and stellar mass surface densities ($\rm {\Sigma _{*}}$). By combining with high z galaxies, we found that there is a good correlation between the velocity dispersion and the SFR as well as $\rm {\Sigma _{SFR}}$. But the correlation between the velocity dispersion and the stellar mass as well as $\rm {\Sigma _{*}}$ is moderate. By comparing our results with predictions of theoretical models, we found that the energy feedback from star formation processes alone and the gravitational instability alone cannot fully explain simultaneously the observed velocity–dispersion/SFR and velocity–dispersion/$\rm {\Sigma _{SFR}}$ relationships.},
doi = {10.1093/mnras/stz1146},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 4,
volume = 486,
place = {United Kingdom},
year = {2019},
month = {4}
}

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DOI: 10.1093/mnras/stz1146

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