STELLAR POPULATION PROPERTIES AND EVOLUTION ANALYSIS OF NGC 628 WITH PANCHROMATIC PHOTOMETRY
STELLAR POPULATION PROPERTIES AND EVOLUTION ANALYSIS OF NGC 628 WITH PANCHROMATIC PHOTOMETRY
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NGC 628 的星族特性及全色光度分析
DOI:
10.1088/0004-6256/142/1/16
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发表时间:
2011-04
影响因子:
5.3
通讯作者:
Tianmeng Zhang
中科院分区:
文献类型:
--
作者:
Hu Zou;Zhou Fan;Wei Zhang;Yanbin Yang;Xu Zhou;Zhaoji Jiang;Jun Ma;Zhenyu Wu;Jianghua Wu;Tianmeng Zhang
Panchromatic spectral energy distribution from the ultraviolet, optical to infrared photometry of NGC 628, combined with evolutionary stellar population synthesis, is used to derive the spatially resolved age, metallicity, and reddening maps. These parameter distributions show that the bulge of this galaxy is a disk-like pseudobulge, which has a Sérsic index close to the exponential law, rich gas, and a young circumnuclear ring structure. We also discover that the disk has two distinct regions with different radial age and metallicity gradients. The inner region is older and has a much steeper age gradient than the outer region of the disk. Both these two regions and the central young structure can be seen in the radial profile of the optical color. Based on the age and reddening distributions, we conclude that the pseudobulge and disk are likely to have grown via secular evolution, which is the redistribution of mass and energy through the angular momentum transport caused by the non-axisymmetric potential of the spirals. However, possible gas accretion events could affect the outer region of the disk due to abundant H i gas accumulating in the outer disk.
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影响因子:
6.5
作者:
J. Knapen;S. Stedman;D. Bramich;S. Folkes;T. R. B. U. O. Hertfordshire;U. S. Andrews
通讯作者:
J. Knapen;S. Stedman;D. Bramich;S. Folkes;T. R. B. U. O. Hertfordshire;U. S. Andrews
DOI:
10.1086/184981
发表时间:
1987-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
D. Lin;J. Pringle
通讯作者:
D. Lin;J. Pringle
DOI:
10.1088/0004-6256/136/2/773
发表时间:
2008-05
期刊:
The Astronomical Journal
影响因子:
--
作者:
D. Fisher;N. Drory
通讯作者:
D. Fisher;N. Drory
DOI:
10.1051/aas:1997373
发表时间:
1997-01
期刊:
Astronomy & Astrophysics Supplement Series
影响因子:
--
作者:
T. Lejeune;F. Cuisinier;R. Inst.;U. Basel;CH Obs. Astron.;Strasbourg;FR Ins. Astron. e Geof.
通讯作者:
T. Lejeune;F. Cuisinier;R. Inst.;U. Basel;CH Obs. Astron.;Strasbourg;FR Ins. Astron. e Geof.
DOI:
10.1111/j.1365-2966.2009.14717.x
发表时间:
2009-03
影响因子:
4.8
作者:
R. Kotulla;U. Fritze;P. Weilbacher;P. Anders
通讯作者:
R. Kotulla;U. Fritze;P. Weilbacher;P. Anders