Type Ia Supernovae at z>1.5 from the HST Multi-Cycle Treasury Surveys

Details Type Ia Supernovae at z>1.5 from the HST Multi-Cycle Treasury Surveys Type Ia Supernovae at z>1.5 from the HST Multi-Cycle Treasury Surveys

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21821901r&link_type=abstract

American Astronomical Society, AAS Meeting #218, #219.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Presenting early results from the joint CANDELS+CLASH Supernova survey, we describe the discovery and spectroscopic classification of a Type Ia Supernova (SNIa) at z=1.55, matching the highest redshift for a confirmed SNIa on record. This HST Treasury survey has the potential to detect and characterize SNIa out to redshift 2 and beyond, building up a sample of SNIa in the era of deceleration, where dark energy effects are expected to be minimal. Comparing these SNe to low-redshift counterparts, we will be able to test for SNIa evolution effects that could introduce systematic biases in SN cosmology. Tracing the SNIa rate to z>2 will clarify the still controversial delay time distribution measurement and put new constraints on SNIa progenitor models.

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