The evolution of interacting spiral galaxy NGC 5194
The evolution of interacting spiral galaxy NGC 5194
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相互作用的螺旋星系 NGC 5194 的演化
DOI:
10.1093/mnras/stv340
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发表时间:
2015-03
影响因子:
4.8
通讯作者:
Wang Lang
中科院分区:
文献类型:
--
作者:
Kang Xiaoyu;Chang Ruixiang;Zhang Fenghui;Cheng Liantao;Wang Lang
NGC 5194 (M51a) is a grand-design spiral galaxy and undergoing interactions with its companion. Here, we focus on investigating main properties of its star formation history (SFH) by constructing a simple evolution model, which assumes that the disc builds up gradually by cold gas infall and the gas infall rate can be parameterizedly described by a Gaussian form. By comparing model predictions with the observed data, we discuss the probable range for free parameter in the model and then know more about the main properties of the evolution and SFH of M51a. We find that the model predictions are very sensitive to the free parameter and the model adopting a constant infall-peak time t(p) = 7.0 Gyr can reproduce most of the observed constraints of M51a. Although our model does not assume the gas infall time-scale of the inner disc is shorter than that of the outer disc, our model predictions still show that the disc of M51a forms inside-out. We find that the mean stellar age of M51a is younger than that of the Milky Way, but older than that of the gas-rich disc galaxy UGC 8802. In this paper, we also introduce a 'toy' model to allow an additional cold gas infall occurred recently to imitate the influence of the interaction between M51a and its companion. Our results show that the current molecular gas surface density, the star formation rate and the UV-band surface brightness are important quantities to trace the effects of recent interaction on galactic star formation process.
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影响因子:
6.5
作者:
R. Scheepmaker;H. Lamers;P. Anders;S. Larsen
通讯作者:
R. Scheepmaker;H. Lamers;P. Anders;S. Larsen
DOI:
10.1086/491786
发表时间:
2005-10
期刊:
The Astronomical Journal
影响因子:
--
作者:
M. Lee;R. Chandar;B. Whitmore
通讯作者:
M. Lee;R. Chandar;B. Whitmore
DOI:
10.1086/424377
发表时间:
2004-07
期刊:
The Astrophysical Journal
影响因子:
--
作者:
F. Bresolin;D. Garnett;Robert C. Kennicutt Jr.
通讯作者:
F. Bresolin;D. Garnett;Robert C. Kennicutt Jr.
DOI:
--
发表时间:
--
期刊:
--
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1088/0067-0049/190/2/233
发表时间:
2010-07
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
J. Moustakas;R. Kennicutt;C. Tremonti;D. Dale;John-David T. Smith;D. Calzetti
通讯作者:
J. Moustakas;R. Kennicutt;C. Tremonti;D. Dale;John-David T. Smith;D. Calzetti