Type-Ia supernovae: new clues to their progenitors from the delay-time distribution

Details Type-Ia supernovae: new clues to their progenitors from the delay-time distribution Type-Ia supernovae: new clues to their progenitors from the delay-time distribution

2010-11-03

arxiv.org/abs/1011.1014v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Invited review, to appear in proceedings of "Binary Star Evolution", held in Mykonos, Greece, June 22-25, 2010

Scientific paper

Despite their prominent role in cosmography, little is yet known about the nature of type-Ia supernovae (SNe Ia), from the identity of their progenitor systems, through the evolution of those systems up to ignition and explosion, and to the causes of the environmental dependences of their observed properties. I briefly review some of those puzzles. I then focus on recent progress in reconstructing the SN Ia delay time distribution (DTD) -- the SN rate versus time that would follow a hypothetical brief burst of star formation. A number of measurements of the DTD over the past two years, using different methods and based on SNe Ia in different environments and redshift ranges, are converging. At delays 1

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