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Binary stars on the galaxy SFH

Part of: IAU Issue 315 - From Interstellar Clouds...

Published online by Cambridge University Press:  12 September 2016

F. Zhang ,
L. Li  and
Z. Han
F. Zhang
Affiliation:
Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China email: [email protected]
L. Li
Affiliation:
Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China email: [email protected]
Z. Han
Affiliation:
Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China email: [email protected]
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Abstract

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Using the Yunnan-II evolutionary population synthesis models comprising binary stars, we find that the inclusion of binary stars can raise the derived stellar metallicity Z* and/or age t (degeneracy problem), raise the stellar mass M*, lower the gaseous metallicity Zgas and star formation rate (SFR) of galaxies. This means that a few stars form recently in galaxies, while more stars form during the entire evolution process when considering binary stars. If the degeneracy between t and Z* can be broken, its effect on the feedback process and star formation history can be determined.

Keywords

(stars:) binaries: generalgalaxies: evolution
Type
Poster Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S315: From Interstellar Clouds to Star-Forming Galaxies: Universal Processes? , August 2015 , E86
Copyright
Copyright © International Astronomical Union 2016 

References

Han, Z., Podsiadlowski, Ph., Lynas-Gray, A. 2007, MNRAS, 380, 1098 Google Scholar
Sana, et al. 2012, nature, 444, 6 Google Scholar
Zhang, F., Han, Z., Li, L., Hurley, J., 2004, A&A, 415, 117 Google Scholar
Zhang, F., Han, Z., Li, L., Hurley, J., 2005, MNRAS, 357, 1088 Google Scholar
Zhang, F., et al., 2012, MNRAS, 421, 743 Google Scholar
Zhang, F., Li, L., Han, Z., Kang, X., 2015, MNRAS, 447, L21 Google Scholar