A measurement of the rate of type Ia supernovae at redshift z ∼ 0.1 from the first season of the SDSS-II supernova survey

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

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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 Ωm = 0.3 = 1 - ΩΛ, 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)β, we obtain a value of β = 1.5 ± 0.6, i.e., the SN Ia rate is determined to be an increasing function of redshift at the ∼-2.5 σ level. Fitting the results to a model in which the volumetric SN rate is rV = Aρ(t) + Bρ(t), where ρ(t) is the stellar mass density and ρ(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 Mȯ-1.

Original languageEnglish (US)
Pages (from-to)262-282
Number of pages21
JournalAstrophysical Journal
Volume682
Issue number1
DOIs
StatePublished - Jul 20 2008

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Dilday, B., Kessler, R., Frieman, J. A., Holtzman, J., Marriner, J., Miknaitis, G., Nichol, R. C., Romani, R., Sako, M., Bassett, B., Becker, A., Cinabro, D., DeJongh, F., Depoy, D. L., Doi, M., Garnavich, P. M., Hogan, C. J., Jha, S., Konishi, K., ... York, D. (2008). A measurement of the rate of type Ia supernovae at redshift z ∼ 0.1 from the first season of the SDSS-II supernova survey. Astrophysical Journal, 682(1), 262-282. https://doi.org/10.1086/587733