2009/01/05 by Keiichi Maeda, Nozomu Tominaga
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Gamma-ray bursts and supernovae #Neutrino Physics Research #astro-ph.HE #astro-ph.SR
paper · pdf · doi:10.1111/j.1365-2966.2009.14460.x
10 pages, 5 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society. The resolution of figures is lower than the original, accepted version
arxiv created 2009/01/05 · openalex publication_date 2009/03/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Theoretically expected natures of a supernova (SN) driven by a wind/jet are discussed. Approximate analytical formulations are derived to clarify basic physical processes involved in the wind/jet-driven explosions, and it is shown that the explosion properties are characterized by the energy injection rate and the mass injection rate . To explain observations of Supernova 1998bw associated with gamma-ray burst (GRB) 980425, the following conditions are required: and (if the wind Lorentz factor Γw∼ 1) or (if Γw≫ 1). In Supernova 1998bw, 56Ni (∼0.4 M⊙) is probably produced in the shocked stellar mantle, not in the wind. The expected natures of SNe, e.g. ejected 56Ni mass and ejecta mass, vary depending on and . The sequence of the SN properties from high and to low and is as follows: Supernova 1998bw-like – intermediate case – low mass ejecta (≲1 M⊙) where 56Ni is from the wind – whole collapse. This diversity may explain the diversity of SNe associated with GRBs. Our result can be used to constrain natures of the wind/jet, which are linked to the central engine of GRBs, by studying properties of the associated SNe.