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Light-curve and spectral properties of ultra-stripped core-collapse supernovae

Published online by Cambridge University Press:  28 July 2017

Takashi J. Moriya
Takashi J. Moriya*
Affiliation:
Division of Theoretical Astronomy, National Astronomical Observatory of Japan, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan email: [email protected]
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Abstract

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We discuss light-curve and spectral properties of ultra-stripped core-collapse supernovae. Ultra-stripped supernovae are supernovae with ejecta masses of only ~0.1M⊙ whose progenitors lose their envelopes due to binary interactions with their compact companion stars. We follow the evolution of an ultra-stripped supernova progenitor until core collapse and perform explosive nucleosynthesis calculations. We then synthesize light curves and spectra of ultra-stripped supernovae based on the nucleosynthesis results. We show that ultra-stripped supernovae synthesize ~0.01M⊙ of the radioactive 56Ni, and their typical peak luminosity is around 1042 erg s−1 or −16 mag. Their typical rise time is 5 − 10 days. By comparing synthesized and observed spectra, we find that SN 2005ek and some of so-called calcium-rich gap transients like PTF10iuv may be related to ultra-stripped supernovae.

Keywords

supernovae: generalgravitational waves
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 426
Copyright
Copyright © International Astronomical Union 2017 

References

Moriya, T. J., Mazzali, P. A., Tominaga, N., Hachinger, S., Blinnikov, S. I., Tauris, T. M., Takahashi, K., Tanaka, M., Langer, N., & Podsiadlowski, Ph. 2016, Mon. Not. R. Astron. Soc., accepted (arXiv:1612.02882)Google Scholar
Tauris, T. M., Langer, N., Moriya, T. J., Podsiadlowski, Ph., Yoon, S.-C., & Blinnikov, S. I., 2013, Astrophys. J. Letters, 778, L23 CrossRefGoogle Scholar