Type II-P Supernovae from SDSS II Supernova Survey

Details Type II-P Supernovae from SDSS II Supernova Survey Type II-P Supernovae from SDSS II Supernova Survey

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21342514d&link_type=abstract

American Astronomical Society, AAS Meeting #213, #425.14; Bulletin of the American Astronomical Society, Vol. 41, p.254

Astronomy and Astrophysics

Astronomy

Scientific paper

Using the expansion velocities of the ejecta of Type II-P supernova to standardize the magnitude along the plateau, it has been shown that the dispersion in magnitudes can be reduced to levels that potentially make these objects useful distance indicators. The recently completed Sloan Digital Sky Survey II Supernova Survey spectroscopically confirmed 42 Type II-P supernovae over its 3 years of operation. Based on preliminary studies, we find that 13 of these supernovae are useful for cosmology, having sufficient photometry and spectroscopy to standardize using the expansion velocity - plateau luminosity method, doubling the size of the published sample. We present preliminary results from this analysis and their implications towards future supernova surveys, as well as analysis of the colors and evolution of these hydrogen rich supernovae.

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