Variation of the Mid-infrared versus Hα Luminosity Correlation with Increasing Redshift for Galaxies in the Local Universe
文献类型：期刊论文
| 作者 | Zhu,Yinan2,3 ; Wu,Hong3; Jin,Junjie1,3
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| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2019-03-26 |
| 卷号 | 874期号:1 |
| 关键词 | galaxies: starburst infrared: galaxies stars: formation |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab04a1 |
| 英文摘要 | Abstract The correlation between mid-infrared (MIR) and Hα luminosity (hereafter referred to as the MIR versus Hα correlation) has been investigated for years, and these approximate linear correlations have been applied to many studies to derive the ongoing star formation rate (SFR) for galaxies near and far. We present and analyze the correlations between rest-frame 12 and 22 μm and Hα luminosities for a large sample of star-forming galaxies with redshift ranging from 0.03 to 0.15 selected in the cross-matched SDSS DR7 and ALLWISE survey. For the galaxies located in a relatively narrow redshift bin (Δz?～?0.01), we find that the fitting slope of the MIR versus Hα correlation is always less than 1, and less than the slope derived for all the star-forming galaxies covering a broad redshift range (0.03 < z < 0.15). Additionally, the fitting intercept increases with redshift. We check the influence on the L[MIR] versus L[Hα] correlation from K- and aperture correction, the variation of either star formation history or morphology, and find their influence is not large enough to account for the inconsistency of the MIR versus Hα correlation individually. We also find that there is possible evolution for the SFR versus M* (stellar mass) correlation within the redshift coverage from 0.03 to 0.15. Finally, we warn that an unwanted error might be brought in if the MIR versus Hα correlation derived from the sample covering a large redshift interval has been applied, and indicate an explicit study is needed to establish an accurate, redshift-independent MIR versus Hα correlation. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-874-1-AB04A1 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/31046]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.School of Astronomy and Space Science University of Chinese Academy of Sciences, Beijing 100039, People's Republic of China; jjjin@bao.ac.cn 2.School of Physics and Astronomy, Sun Yat-sen University, Zhuhai 519082, People's Republic of China; hwu@bao.ac.cn 3.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China zhuyn9@mail.sysu.edu.cn |
| 推荐引用方式 GB/T 7714 | Zhu,Yinan,Wu,Hong,Jin,Junjie. Variation of the Mid-infrared versus Hα Luminosity Correlation with Increasing Redshift for Galaxies in the Local Universe[J]. The Astrophysical Journal,2019,874(1). |
| APA | Zhu,Yinan,Wu,Hong,&Jin,Junjie.(2019).Variation of the Mid-infrared versus Hα Luminosity Correlation with Increasing Redshift for Galaxies in the Local Universe.The Astrophysical Journal,874(1). |
| MLA | Zhu,Yinan,et al."Variation of the Mid-infrared versus Hα Luminosity Correlation with Increasing Redshift for Galaxies in the Local Universe".The Astrophysical Journal 874.1(2019). |
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来源：国家天文台
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