Coping with Type Ia Supernova "Evolution" When Probing the Nature of the Dark Energy

Details Coping with Type Ia Supernova "Evolution" When Probing the Nature of the Dark Energy Coping with Type Ia Supernova "Evolution" When Probing the Nature of the Dark Energy

2001-09-05

arxiv.org/abs/astro-ph/0109070v1

Astronomy and Astrophysics

Astrophysics

9 pages. Contribution to the SNAP (Supernova Acceleration Probe) Yellow Book (Snowmass 2001)

Scientific paper

Observations of high-redshift Type Ia supernovae (SNe Ia) have provided strong evidence that the dark energy is real, and making further accurate observations of high-redshift SNe Ia is the most promising way to probe the nature of the dark energy. We discuss one of the concerns about such a project - that of coping with SN Ia evolution. We emphasize that SN Ia evolution differs in an important respect from the kind of evolution that has foiled some past projects in observational cosmology, and we outline empirical strategies that will take it into account. The supporting role of physical models of SNe Ia also is discussed. Our conclusion is that systematic errors due to SN Ia evolution will be small.

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