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IRX–β RELATION OF STAR-FORMING REGIONS IN NGC 628 BASED ON INTEGRAL FIELD SPECTROSCOPY
Ye,Chengyun1; Zou,Hu2; Lin,Lin3; Lian,Jianhui1; Hu,Ning1; Kong,Xu1
2016-08-01
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume826Issue:2
AbstractABSTRACT It has been found that the infrared-to-ultraviolet luminosity ratio (IRX) and ultraviolet spectral slope (β) have a tight correlation in starburst galaxies, while in normal galaxies the relation is deviated and has a much larger scatter. Star formation regions are much simpler in both morphology and physical properties than galaxies, so their photometric and spectroscopic properties are more easily and accurately determined. We have used the integral field spectroscopy and multiband photometric images to study the IRX–β relation of H ii regions in a nearby galaxy, NGC 628. There are obvious correlations between the Dn(4000), stellar population age, star formation rate, especially Hα equivalent width EW(Hα), and deviation distance dp from the starburst IRX–β relation. However, there is little correlation between the Balmer decrement, metallicity, and dp. It is much more complicated than expected, so that we cannot introduce a single second parameter to describe the scatter and deviation of the H ii region IRX–β relation.
Keyworddust, extinction galaxies: star formation infrared: galaxies ultraviolet: galaxies
DOI10.3847/0004-637X/826/2/209
Language英语
WOS IDIOP:0004-637X-826-2-209
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/36340
Collection中国科学院国家天文台
Affiliation1.CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei 230026, China; yechy@mail.ustc.edu.cn, xkong@ustc.edu.cn
2.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
3.Shanghai Astronomical Observatory, Nandan Road 80, Shanghai 200030, China
Recommended Citation
GB/T 7714
Ye,Chengyun,Zou,Hu,Lin,Lin,等. IRX–β RELATION OF STAR-FORMING REGIONS IN NGC 628 BASED ON INTEGRAL FIELD SPECTROSCOPY[J]. The Astrophysical Journal,2016,826(2).
APA Ye,Chengyun,Zou,Hu,Lin,Lin,Lian,Jianhui,Hu,Ning,&Kong,Xu.(2016).IRX–β RELATION OF STAR-FORMING REGIONS IN NGC 628 BASED ON INTEGRAL FIELD SPECTROSCOPY.The Astrophysical Journal,826(2).
MLA Ye,Chengyun,et al."IRX–β RELATION OF STAR-FORMING REGIONS IN NGC 628 BASED ON INTEGRAL FIELD SPECTROSCOPY".The Astrophysical Journal 826.2(2016).
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