Star Formation Rate Indicators in Wide-Field Infrared Survey Preliminary Release

Journal of astrophysics and astronomy

Dong-Xin Fan³  James Wicker¹  Xu Kong2 3⁴  Zi-Qiang Gong²  Fei Shi1²  Yang Chen⁴ 

[1] National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100012, China$$;Department of Basic Science, North China Institute of Spaceflight Engineering, Hebei 065000, China$$;Department of Physics and Electronics, Guangxi Teachers Education University, Nanning 530001, China$$;Center of Astrophysics, University of Science and Technology of China, Hefei 230026, China$$

关键词: Galaxies: star formation;    galaxies: abundances;    methods: data analysis;    infrared: galaxies.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

With the goal of investigating the degree at which the MIR luminosity in the Wide-field Infrared Survey Explorer (WISE) traces the SFR, we analyse 3.4, 4.6, 12 and 22 𝜇m data in a sample of ∼ 140,000 star-forming galaxies or star-forming regions covering a wide range in metallicity 7.66 < 12 + log (O/H) < 9.46, with redshift 𝑧 < 0.4. These star-forming galaxies or star-forming regions are selected by matching the WISE Preliminary Release Catalog with the star-forming galaxy Catalog in SDSS DR8 provided by JHU/MPA. We study the relationship between the luminosity at 3.4, 4.6, 12 and 22 𝜇m from WISE and H𝛼 luminosity in SDSS DR8. From these comparisons, we derive reference SFR indicators for use in our analysis. Linear correlations between SFR and the 3.4, 4.6, 12 and 22 𝜇m luminosity are found, and calibrations of SFRs based on L(3.4), L(4.6), L(12) and L(22) are proposed. The calibrations hold for galaxies with verified spectral observations. The dispersion in the relation between 3.4, 4.6, 12 and 22 𝜇m luminosity and SFR relates to the galaxy’s properties, such as 4000 Å break and galaxy color.

【 授权许可】

Unknown