A Measurement of the Rate of Type Ia Supernovae at Redshift z 0.1 from the First Season of the SDSS-II Supernova Survey Academic Article uri icon

abstract

  • We present a measurement of the rate of Type Ia supernovae (SNe Ia) from the first of three seasons of data from the SDSS-II Supernova Survey. For this measurement, we include 17 SNe Ia at redshift z 0.12. Assuming a flat cosmology with m = 0.3 = 1 - , we find a volumetric SN Ia rate of [2:93-0.040+0.17(systematic)-0.71+0.90(statistical) 10-5 SNe Mpc-3 h703 yr -1, at a volume-weighted mean redshift of 0.09. This result is consistent with previous measurements of the SN Ia rate in a similar redshift range. The systematic errors are well controlled, resulting in the most precise measurement of the SN Ia rate in this redshift range. We use a maximum likelihood method to fit SN rate models to the SDSS-II Supernova Survey data in combination with other rate measurements, thereby constraining models for the redshift evolution of the SN Ia rate. Fitting the combined data to a simple power-law evolution of the volumetric SN Ia rate, rV (1 + z), we obtain a value of = 1.5 0.6, i.e., the SN Ia rate is determined to be an increasing function of redshift at the -2.5 level. Fitting the results to a model in which the volumetric SN rate is rV = A(t) + B(t), where (t) is the stellar mass density and (t) is the star formation rate, we find A = (2.8 1.2) 10-14 SNe M-1 yr -1, B = (9.3-3.1+3.4 10-4 SNe M-1. 2008. The American Astronomical Society. All rights reserved.

published proceedings

  • The Astrophysical Journal

author list (cited authors)

  • Dilday, B., Kessler, R., Frieman, J. A., Holtzman, J., Marriner, J., Miknaitis, G., ... York, D.

citation count

  • 93

complete list of authors

  • Dilday, Benjamin||Kessler, Richard||Frieman, Joshua A||Holtzman, Jon||Marriner, John||Miknaitis, Gajus||Nichol, Robert C||Romani, Roger||Sako, Masao||Bassett, Bruce||Becker, Andrew||Cinabro, David||DeJongh, Fritz||Depoy, Darren L||Doi, Mamoru||Garnavich, Peter M||Hogan, Craig J||Jha, Saurabh||Konishi, Kohki||Lampeitl, Hubert||Marshall, Jennifer L||McGinnis, David||Prieto, Jose Luis||Riess, Adam G||Richmond, Michael W||Schneider, Donald P||Smith, Mathew||Takanashi, Naohiro||Tokita, Kouichi||van der Heyden, Kurt||Yasuda, Naoki||Zheng, Chen||Barentine, John||Brewington, Howard||Choi, Changsu||Crotts, Arlin||Dembicky, Jack||Harvanek, Michael||Im, Myunshin||Ketzeback, William||Kleinman, Scott J||Krzesiński, Jurek||Long, Daniel C||Malanushenko, Elena||Malanushenko, Viktor||McMillan, Russet J||Nitta, Atsuko||Pan, Kaike||Saurage, Gabrelle||Snedden, Stephanie A||Watters, Shannon||Wheeler, J Craig||York, Donald

publication date

  • July 2008