Constrains on the Initial Mass Function from Type 1a Supernovae in GOODS

Details Constrains on the Initial Mass Function from Type 1a Supernovae in GOODS Constrains on the Initial Mass Function from Type 1a Supernovae in GOODS

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21342307t&link_type=abstract

American Astronomical Society, AAS Meeting #213, #423.07; Bulletin of the American Astronomical Society, Vol. 41, p.244

Astronomy and Astrophysics

Astronomy

Scientific paper

We fit the multi-wavelength Hubble and Spitzer photometry of 18 z greater than 1 Type Ia Supernova (SN1a) host galaxies in the GOODS fields with stellar population synthesis models. These models give constraints on the age, metallicity and initial mass function (IMF) of the stellar population in the host. By characterizing the age of the stellar population in the host we can constrain the SN1a delay time, the time between the formation of the binary system of the progenitor and the supernova explosion. Studies of this delay time suggest SN1a fall into one of two types: a prompt type, with short delay times and progenitors from young stellar populations and a delayed type, with long delay times, from older, more evolved populations. Therefore, by constraining the properties of the underlying stellar population of the host galaxies we can assess the fractional contribution of prompt and delayed explosions to the high-z SN1a rate. The rate density of prompt and delayed SN1a relative to the cosmic star-formation rate density will also be used to assess recent suggestions for an evolution of the stellar IMF with redshift.
Support for this work was provided by NASA through the Spitzer Space Telescope Visiting Graduate Student Program, through a contract issued by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA.

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