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Comparing the star formation history of three nearby disk galaxies

Published online by Cambridge University Press:  30 October 2019

Ruixiang Chang ,
Xiaoyu Kang  and
Fenghui Zhang
Ruixiang Chang
Affiliation:
Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, CAS, 80 Nandan Road, Shanghai, 200030, China email: [email protected]
Xiaoyu Kang
Affiliation:
Yunnan Observatories, CAS, 396 Yangfangwang, Guandu District, Kunming, 650216, China Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, 396 Yangfangwang, Guandu District, Kunming, 650216, China Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
Fenghui Zhang
Affiliation:
Yunnan Observatories, CAS, 396 Yangfangwang, Guandu District, Kunming, 650216, China Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, 396 Yangfangwang, Guandu District, Kunming, 650216, China Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
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Abstract

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Understanding the effect of environment on galaxy formation and evolution is one of the hot topics in extragalactic astronomy. Here we constructed a chemical evolution model of disk galaxies. By comparing the model predictions with the observed profiles, we investigated the star formation history of M33, NGC 300 and NGC 2403. We found that M33 has much longer infall timescale than NGC 300 and NGC 2403, and the star formation process of M33 is still active at later phase. Our results suggested that the cold gas supply of M33 is sufficient in the present-day, which may originate from the HI bridge between M33 and M31. In other words, we argue that the local environment plays an important role on the star formation history of a galaxy, at least for M33.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S344: Dwarf Galaxies: From the Deep Universe to the Present , August 2018 , pp. 271 - 273
Copyright
© International Astronomical Union 2019 

References

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