On Type Ia supernovae from the collisions of two white dwarfs

Cody Raskin, Francis Timmes, Evan Scannapieco, Steven Diehl, Chris Fryer

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

We explore collisions between two white dwarfs as a pathway for making Type Ia supernovae (SNIa). White dwarf number densities in globular clusters allow 10-100, redshift ≲1 collisions per year, and observations by Chomiuk et al. of globular clusters in the nearby S0 galaxy NGC 7457 have detected what is likely to be a SNIa remnant. We carry out simulations of the collision between two 0.6 M white dwarfs at various impact parameters and mass resolutions. For impact parameters less than half the radius of the white dwarf, we find such collisions produce ≈ 0.4 M of56Ni, making such events potential candidates for underluminous SNIa or a new class of transients between Novae and SNIa.

Original languageEnglish (US)
JournalMonthly Notices of the Royal Astronomical Society: Letters
Volume399
Issue number1
DOIs
StatePublished - Oct 2009

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supernovae
collision
collisions
globular clusters
novae
galaxies
radii
simulation
parameter

Keywords

  • Hydrodynamics
  • Nuclear reactions, nucleosynthesis, abundances
  • Supernovae: general
  • White dwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

On Type Ia supernovae from the collisions of two white dwarfs. / Raskin, Cody; Timmes, Francis; Scannapieco, Evan; Diehl, Steven; Fryer, Chris.

In: Monthly Notices of the Royal Astronomical Society: Letters, Vol. 399, No. 1, 10.2009.

Research output: Contribution to journalArticle

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