Mathematics – Logic
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543011g&link_type=abstract
American Astronomical Society, AAS Meeting #215, #430.11; Bulletin of the American Astronomical Society, Vol. 42, p.357
Mathematics
Logic
Scientific paper
Observations of Type Ia supernovae are a key component of the standard cosmological model. Their luminosity-distance calibration provides evidence for the existence of dark energy, but the nature of their progenitor system remains unknown. Studying physical properties of the host galaxies can provide insight into the environment and stellar populations in which SNe Ia occur. Using the SDSS-II SN Ia sample we obtain host galaxy photometry spanning the ultraviolet, optical, and infrared bands from the GALEX, SDSS, and UKIDSS surveys, respectively. We then constrain star-formation history of SNe Ia host galaxies by comparing observed magnitudes to model magnitudes generated from stellar population synthesis codes. Future work with SDSS spectroscopy can be used to estimate the metallicity of these galaxies as well. Knowledge of both star formation and metallicity of host galaxies will improve our understanding of SNe Ia progenitors and the diversity of their light curves.
Bernardi Marco
Conroy Charlie
Dilday Benjamin
Frieman Joshua A.
Greggio Laura
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