Mathematics – Logic
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21942901h&link_type=abstract
American Astronomical Society, AAS Meeting #219, #429.01
Mathematics
Logic
Scientific paper
We analyze 17 host galaxies of type Ia supernovae (SN Ia) in the CANDELS supernova survey, and compare their properties to the overall properties of SN Ia host galaxies from the literature. Combined with hosts from other high redshift SN surveys, this presents a large sample of SN Ia hosts at high redshift. One goal of the CANDELS SN Survey is to discover and study type Ia supernovae at z>1 and to use them to constrain cosmological parameters. CANDELS uses the Wide Field Camera 3 (WFC3), installed on the Hubble Space Telescope in May 2009. The WFC3 near-infrared images correspond to the rest-frame optical band, which allows for higher redshift discoveries and reduces systematic errors from selection effects. We use PEGASE.2 to create simulated galactic spectral energy distributions, which are then used as templates to calculate the best-fit parameters for the CANDELS hosts. Specifically, we analyze the host galaxy mass and the star formation rate. These parameters have been shown to correlate with light curve parameters of SNe Ia, and therefore any shift in the distribution of host properties at the high redshifts in CANDELS could result in a shift in the distribution of SN Ia light curve properties. This can affect the measured cosmological parameters of our universe, especially the value of the cosmological constant and the energy density of dark energy. We compare our findings for the high redshift hosts to lower-redshift sets in the literature, and discuss our findings based on the implications for cosmology.
Garnavich Peter
Hayden Brian
Survey CANDELS SN
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