Moriya, Takashi J, Mazzali, Paolo A, Tominaga, Nozomu, Hachinger, Stephan, Blinnikov, Sergei I, Tauris, Thomas M, Takahashi, Koh, Tanaka, Masaomi, Langer, Norbert and Podsiadlowski, Philipp
(2016)
Light-curve and spectral properties of ultra-stripped core-collapse
supernovae leading to binary neutron stars.
Monthly Notices of the Royal Astronomical Society, 466 (2).
2098-.
Text
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Abstract
We investigate light-curve and spectral properties of ultra-stripped core-collapse supernovae. Ultra-stripped supernovae are the explosions of heavily stripped massive stars which lost their envelopes via binary interactions with a compact companion star. They eject only ~ 0.1 Msun and may be the main way to form double neutron-star systems which eventually merge emitting strong gravitational waves. We follow the evolution of an ultra-stripped supernova progenitor until iron core collapse and perform explosive nucleosynthesis calculations. We then synthesize light curves and spectra of ultra-stripped supernovae using the nucleosynthesis results and present their expected properties. Ultra-stripped supernovae synthesize ~ 0.01 Msun of radioactive 56Ni, and their typical peak luminosity is around 1e42 erg/s or -16 mag. Their typical rise time is 5 - 10 days. Comparing synthesized and observed spectra, we find that SN 2005ek, some of the so-called calcium-rich gap transients, and SN 2010X may be related to ultra-stripped supernovae. If these supernovae are actually ultra-stripped supernovae, their event rate is expected to be about 1 per cent of core-collapse supernovae. Comparing the double neutron-star merger rate obtained by future gravitational-wave observations and the ultra-stripped supernova rate obtained by optical transient surveys identified with our synthesized light-curve and spectral models, we will be able to judge whether ultra-stripped supernovae are actually a major contributor to the binary neutron star population and provide constraints on binary stellar evolution.
Item Type: | Article |
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Additional Information: | 15 pages, 18 figures, 2 tables, accepted by Monthly Notices of the Royal Astronomical Society |
Uncontrolled Keywords: | astro-ph.HE, astro-ph.HE, astro-ph.SR |
Depositing User: | Symplectic Admin |
Date Deposited: | 16 Jan 2020 14:21 |
Last Modified: | 19 Jan 2023 00:09 |
DOI: | 10.1093/mnras/stw3225 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3070853 |