National Astronomical Observatory of Japan, Tokyo (Japan); Institute of Astronomy and Astrophysics, Academia Sinica, Taipei (Taiwan); Univ. of California, Santa Cruz, CA (United States)
National Astronomical Observatory of Japan, Tokyo (Japan)
Univ. of California, Santa Cruz, CA (United States)
We report that Nascent neutron stars (NSs) with millisecond periods and magnetic fields in excess of 1016 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 1052 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 $${M}_{\odot }$$ of $${}^{56}\mathrm{Ni}$$ 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. Lastly, in the absence of a circumstellar medium, these events are not very luminous, with peak bolometric magnitudes of $${M}_{b}\sim -16.5$$ due to low $${}^{56}\mathrm{Ni}$$ production.
Chen, Ke-Jung, et al. "Magnetar-powered Supernovae in Two Dimensions. II. Broad-line Supernovae Ic." The Astrophysical Journal (Online), vol. 839, no. 2, Apr. 2017. https://doi.org/10.3847/1538-4357/aa68a4
@article{osti_1544047,
author = {Chen, Ke-Jung and Moriya, Takashi J. and Woosley, Stan and Sukhbold, Tuguldur and Whalen, Daniel J. and Suwa, Yudai and Bromm, Volker},
title = {Magnetar-powered Supernovae in Two Dimensions. II. Broad-line Supernovae Ic},
annote = {We report that Nascent neutron stars (NSs) with millisecond periods and magnetic fields in excess of 1016 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 1052 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 ${M}_{\odot }$ of ${}^{56}\mathrm{Ni}$ 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. Lastly, in the absence of a circumstellar medium, these events are not very luminous, with peak bolometric magnitudes of ${M}_{b}\sim -16.5$ due to low ${}^{56}\mathrm{Ni}$ production.},
doi = {10.3847/1538-4357/aa68a4},
url = {https://www.osti.gov/biblio/1544047},
journal = {The Astrophysical Journal (Online)},
issn = {ISSN 1538-4357},
number = {2},
volume = {839},
place = {United States},
publisher = {Institute of Physics (IOP)},
year = {2017},
month = {04}}