The evolution of the spiral galaxy M51a

被引：0
|
作者：
Kang, Xiaoyu [1 ,2 ,3 ]
Zhang, Fenghui [1 ,2 ]
Chang, Ruixiang [4 ]
机构：
[1] Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China
[2] Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Beijing, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
来源：
GALAXIES AT HIGH REDSHIFT AND THEIR EVOLUTION OVER COSMIC TIME | 2016年 / 11卷 / S319期
基金：
中国国家自然科学基金;
关键词：
galaxies: abundance; galaxies: evolution; galaxies: individual: M51a; galaxies: spiral;
D O I：
10.1017/S1743921315009916
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A simple model for M51a is constructed to explore its evolutionary history by assuming its disk grows from continuous gas infall, which is shaped by a free parameter-the infall-peak time t(p). By adopting a constant infall-peak time t(p) = 7.0Gyr, our model predictions can reproduce most of the observed constraints and still show that the disk of M51a forms inside-out. Our results also show that the current molecular gas surface density, the star-formation rate and the UV-band surface brightness are important quantities to trace the effect of recent interactions on galactic star-formation process.
引用
收藏
页码：129 / 129
页数：1
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