Magnetar-powered Supernovae in Two Dimensions. II. Broad-line Supernovae Ic
- Division of Theoretical Astronomy, National Astronomical Observatory of Japan, Tokyo 181-8588 (Japan)
- Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)
- Institute of Cosmology and Gravitation, Portsmouth University, Portsmouth (United Kingdom)
- Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502 (Japan)
- Department of Astronomy, University of Texas, Austin, TX 78712 (United States)
Nascent neutron stars (NSs) with millisecond periods and magnetic fields in excess of 10{sup 16} Gauss can drive highly energetic and asymmetric explosions known as magnetar-powered supernovae. These exotic explosions are one theoretical interpretation for supernovae Ic-BL, which are sometimes associated with long gamma-ray bursts. Twisted magnetic field lines extract the rotational energy of the NS and release it as a disk wind or a jet with energies greater than 10{sup 52} erg over ∼20 s. What fraction of the energy of the central engine go into the wind and the jet remain unclear. We have performed two-dimensional hydrodynamical simulations of magnetar-powered supernovae (SNe) driven by disk winds and jets with the CASTRO code to investigate the effect of the central engine on nucleosynthetic yields, mixing, and light curves. We find that these explosions synthesize less than 0.05 M{sub ⊙} of {sup 56}Ni and that this mass is not very sensitive to central engine type. The morphology of the explosion can provide a powerful diagnostic of the properties of the central engine. In the absence of a circumstellar medium, these events are not very luminous, with peak bolometric magnitudes of M{sub b}∼−16.5 due to low {sup 56}Ni production.
- OSTI ID:
- 22872789
- Journal Information:
- Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 839; ISSN ASJOAB; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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