The quest for blue supergiants: Evolution of binary merger progenitors of Type-II peculiar supernovae and SN 1987A

Athira Menon, Alexander Heger

Research output: Contribution to conferenceAbstract


We construct stellar evolution models until core collapse using KEPLER (Woosley & Heger (2007)) to reproduce the observed signatures of the blue supergiant (BSG) progenitor of SN 1987A. This is based on the binary merger scenario proposed by Podsiadlowski (1992) and Ivanova et al. (2002). Various combinations of initial parameters for the binary components (M1 = 16 − 18M and M2 = 5 − 10M) and their merging, successfully match the He, N/C and N/O ratios, along with the luminosity and effective temperature of the progenitor. Most of our models end their lives as BSGs. Thus we may be able to explain the origin of all Type IIP SNe that resemble SN 1987A through such mergers. We are currently working on the light curves and nuclear yields from the explosion of these models to compare them SN 1987A.
Original languageEnglish
Number of pages1
Publication statusPublished - 2016
EventIAU General Assembly 2015 - Honolulu, United States of America
Duration: 3 Aug 201514 Aug 2015
Conference number: 29th


ConferenceIAU General Assembly 2015
Abbreviated titleIAU GA 2015
CountryUnited States of America
Internet address


  • SN 1987A
  • Binary mergers
  • Type IIP SNe

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