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Galaxy: abundances; gamma rays: bursts.

A statistical analysis of gamma-ray burst host galaxies is presented and a clear metallicity-stellar mass relation is found in our sample. A trend that a more massive host galaxy tends to have a higher star-formation rate is also found. No correlation is found between 𝐴_V and 𝑁_H. GRB host galaxies at a higher redshift also tend to have a higher star formation rate, however, even in the same redshift, the star formation rate may vary for three orders of magnitude.

Jie-Min Chen¹ Jin Zhang^{2 3} Lan-Wei Jia⁴ En-Wei Liang^{1 2 3}

1. Department of Physics and GXU-NAOC Center for Astrophysics and Space Sciences, Guangxi University, Nanning 530004, China.
2. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China.
3. Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China.
4. College of Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, China.