Light-curve and spectral properties of ultra-stripped core-collapse supernovae leading to binary neutron stars

Moriya, T; Mazzali, P; Tominaga, N; Hachinger, S; Blinnikov, S; Tauris, T; Takahashi, K; Tanaka, M; Langer, N; Podsiadlowski, P

Journal article

Light-curve and spectral properties of ultra-stripped core-collapse supernovae leading to binary neutron stars

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~M⊙ 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~M⊙ of radioactive 56Ni, and their typical peak luminosity is around 1042~erg~s−1 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.

Publication status:: Published

Peer review status:: Peer reviewed

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APA Style

Moriya, T., Mazzali, P., Tominaga, N., Hachinger, S., Blinnikov, S., Tauris, T., Takahashi, K., Tanaka, M., Langer, N., & Podsiadlowski, P. (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), 2085–2098.

MLA Style

Moriya, T., et al. “Light-Curve and Spectral Properties of Ultra-Stripped Core-Collapse Supernovae Leading to Binary Neutron Stars.” Monthly Notices of the Royal Astronomical Society, vol. 466, no. 2, Oxford University Press, 2016, pp. 2085–98.

Chicago Style

Moriya, T, P Mazzali, N Tominaga, S Hachinger, S Blinnikov, T Tauris, K Takahashi, M Tanaka, N Langer, and P Podsiadlowski. 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): 2085–98.
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