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STAR FORMATION PROPERTIES IN BARRED GALAXIES (SFB). I. ULTRAVIOLET TO INFRARED IMAGING AND SPECTROSCOPIC STUDIES OF NGC 7479
Zhou, Zhi-Min1,2; Cao, Chen3,4; Meng, Xian-Min; Wu, Hong1
2011-08-01
发表期刊ASTRONOMICAL JOURNAL
卷号142期号:2
摘要Large-scale bars and minor mergers are important drivers for the secular evolution of galaxies. Based on ground-based optical images and spectra as well as ultraviolet data from the Galaxy Evolution Explorer and infrared data from the Spitzer Space Telescope, we present a multi-wavelength study of star formation properties in the barred galaxy NGC 7479, which also has obvious features of a minor merger. Using various tracers of star formation, we find that under the effects of both a stellar bar and a minor merger, star formation activity mainly takes place along the galactic bar and arms, while the star formation rate changes from the bar to the disk. With the help of spectral synthesis, we find that strong star formation took place in the bar region about 100 Myr ago, and the stellar bar might have been similar to 10 Gyr old. By comparing our results with the secular evolutionary scenario from Jogee et al., we suggest that NGC 7479 is possibly in a transitional stage of secular evolution at present, and it may eventually become an earlier type galaxy or a luminous infrared galaxy. We also note that the probable minor merger event happened recently in NGC 7479, and we find two candidates for minor merger remnants.
关键词Galaxies: Evolution Galaxies: Individual (Ngc 7479) Galaxies: Star Formation Galaxies: Structure
DOI10.1088/0004-6256/142/2/38
收录类别SCI
语种英语
WOS记录号WOS:000292888200005
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8062
专题光学天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Shandong Univ Weihai, Sch Space Sci & Phys, Weihai 264209, Shandong, Peoples R China
4.Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Shandong, Peoples R China
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Zhou, Zhi-Min,Cao, Chen,Meng, Xian-Min,et al. STAR FORMATION PROPERTIES IN BARRED GALAXIES (SFB). I. ULTRAVIOLET TO INFRARED IMAGING AND SPECTROSCOPIC STUDIES OF NGC 7479[J]. ASTRONOMICAL JOURNAL,2011,142(2).
APA Zhou, Zhi-Min,Cao, Chen,Meng, Xian-Min,&Wu, Hong.(2011).STAR FORMATION PROPERTIES IN BARRED GALAXIES (SFB). I. ULTRAVIOLET TO INFRARED IMAGING AND SPECTROSCOPIC STUDIES OF NGC 7479.ASTRONOMICAL JOURNAL,142(2).
MLA Zhou, Zhi-Min,et al."STAR FORMATION PROPERTIES IN BARRED GALAXIES (SFB). I. ULTRAVIOLET TO INFRARED IMAGING AND SPECTROSCOPIC STUDIES OF NGC 7479".ASTRONOMICAL JOURNAL 142.2(2011).
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