GRB progenitors at low metallicities

Hirschi, R.; Meynet, G.; Maeder, A.

Abstract

We calculated pre-supernova evolution models of single rotating massive stars. These models reproduce observations during the early stages of the evolution very well, in particular Wolf--Rayet (WR) populations and ratio between type II and type Ib,c supernovae at different metallicities (Z). Using these models we found the following results concerning long and soft gamma--ray burst (GRB) progenitors:
- GRBs coming from WO--type (SNIc) WR stars are only produced at low Z (LMC or lower).
- The upper metallicity limit for GRBs is reduced to Z ~ 0.004 (SMC) when the effects of magnetic fields are included.
- GRBs are predicted from the second (and probably the first) stellar generation onwards.

Citation

Hirschi, R., Meynet, G., & Maeder, A. (2007). GRB progenitors at low metallicities. IL NUOVO CIMENTO B, 10-11, 1183-1187. https://doi.org/10.1393/ncb/i2007-10237-6

• Journal Article Type: Article
• Online Publication Date: Jun 13, 2007
• Publication Date: Jun 13, 2007
• Deposit Date: Jul 7, 2023
• Publicly Available Date: Jul 7, 2023
• Journal: IL NUOVO CIMENTO B
• Print ISSN: 2037-4895
• Electronic ISSN: 1826-9877
• Peer Reviewed: Peer Reviewed
• Volume: 10-11
• Pages: 1183-1187
• DOI: https://doi.org/10.1393/ncb/i2007-10237-6
• Keywords: Astrophysics
• Publisher URL: https://www.sif.it/riviste/sif/ncb/econtents/2006/121/10-11/article/32
• Related Public URLs: https://arxiv.org/abs/astro-ph/0610276v1