A Measurement of the Rate of Type Ia Supernovae at Redshiftz≈ 0.1 from the First Season of the SDSS‐II Supernova Survey
Year: 2008
Type: article
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 Ω m = 0.3 = 1 − Ω Λ , we find a volumetric SN Ia rate of [ 2.93 + 0.17 −0.04 (systematic) + 0.90 −0.71 (statistical) ] × 10 −5 SNe Mpc −3 h 3 70 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, r V ∝ (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 r V = Aρ ( t ) + B ( t ), where ρ ( 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 + 3.4 −3.1 ) × 10 −4 SNe M −1 ☉ .
Source: The Astrophysical Journal
DOI: 10.1086/587733
Authors: 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 Lampeitl, Jennifer 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
Institutions: University of Chicago, Fermi National Accelerator Laboratory, New Mexico State University, University of Portsmouth, Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, University of Pennsylvania, University of Cape Town, South African Astronomical Observatory, University of Washington, Wayne State University, The Ohio State University, Institute of Astronomy, Graduate School of Science, The University of Tokyo, The University of Tokyo, University of Notre Dame, Rutgers, The State University of New Jersey, Institute for Cosmic Ray Research, Space Telescope Science Institute, Johns Hopkins University, Rochester Institute of Technology, Pennsylvania State University, Udaipur Solar Observatory, McDonald Observatory, The University of Texas at Austin, Seoul National University, Columbia University, Lowell Observatory, Subaru (Japan), Uniwersytet Komisji Edukacji Narodowej w Krakowie, International Gemini Observatory
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Alfred P. Sloan Foundation, Kavli Foundation, Princeton University, Ohio State University, University of Chicago, University of Washington, Johns Hopkins University, University of Pittsburgh, Case Western Reserve University, Drexel University, Pennsylvania State University, Universität Basel, University of Texas at Austin, University of Portsmouth, New Mexico State University, Chinese Academy of Sciences, Georg-August-Universität Göttingen, Max-Planck-Gesellschaft, National Astronomical Observatory of Japan, Max-Planck-Institut für Astronomie, U.S. Naval Observatory, Fermilab, Los Alamos National Laboratory
OpenAlex ID: W1985504415