Spectra of type ia supernovae from double degenerate mergers

Chris L. Fryer, Ashley J. Ruiter, Krzysztof Belczynski, Peter J. Brown, Filomena Bufano, Steven Diehl, Christopher J. Fontes, Lucille H. Frey, Stephen T. Holland, Aimee L. Hungerford, Stefan Immler, Paolo Mazzali, Casey Meakin, Peter A. Milne, Cody Raskin, Francis X. Timmes

Research output: Contribution to journalArticlepeer-review

69 Scopus citations


The merger of two white dwarfs (aka double-degenerate merger) has often been cited as a potential progenitor of Type Ia supernovae. Here we combine population synthesis, merger, and explosion models with radiationhydrodynamics light-curve models to study the implications of such a progenitor scenario on the observed Type Ia supernova population. Our standard model, assuming double-degenerate mergers do produce thermonuclear explosions, produces supernova light curves that are broader than the observed type Ia sample. In addition, we discuss how the shock breakout and spectral features of these double-degenerate progenitors will differ from the canonical bare Chandrasekhar-massed explosionmodels.We conclude with a discussion of howone might reconcile these differences with current observations.

Original languageEnglish (US)
Pages (from-to)296-308
Number of pages13
JournalAstrophysical Journal
Issue number1
StatePublished - Dec 10 2010


  • Binaries: close
  • Supernovae: general
  • White dwarfs Online-only material: color figures

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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