Type Ia supernovae rates and galaxy clustering from the CFHT supernova legacy survey
- Creators
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Graham, M. L.
- Pritchet, C. J.
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Sullivan, M.
- Gwyn, S. D. J.
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Neill, J. D.
- Hsiao, E. Y.
- Astier, P.
- Balam, D.
- Balland, C.
- Basa, S.
- Carlberg, R. G.
- Conley, A.
- Fouchez, D.
- Guy, J.
- Hardin, D.
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Hook, I. M.
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Howell, D. A.
- Pain, R.
- Perrett, K.
- Regnault, N.
- Baumont, S.
- Le Du7, J.
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Lidman, C.
- Perlmutter, S.
- Ripoche, P.
- Suzuki, N.
- Walker, E. S.
- Zhang, T.
Abstract
The Canada-France-Hawaii Telescope Supernova Legacy Survey (CFHT SNLS) has created a large homogeneous database of intermediate redshift (0.2 < z < 1.0) type Ia supernovae (SNe Ia). The SNLS team has shown that correlations exist between SN Ia rates, properties, and host galaxy star-formation rates (SFRs). The SNLS SN Ia database has now been combined with a photometric redshift galaxy catalog and an optical galaxy cluster catalog to investigate the possible influence of galaxy clustering on the SN Ia rate, over and above the expected effect due to the dependence of SFR on clustering through the morphology-density relation. We identify three cluster SNe Ia, plus three additional possible cluster SNe Ia, and find the SN Ia rate per unit mass in clusters at intermediate redshifts is consistent with the rate per unit mass in field early-type galaxies and the SN Ia cluster rate from low-redshift cluster targeted surveys. We also find the number of SNe Ia in cluster environments to be within a factor of 2 of expectations from the two-component SN Ia rate model.
Additional Information
We gratefully acknowledge the CFHT Queued Service Observations team, Olivier Ilbert and Henry McCracken for early access to and correspondence regarding their photometric redshift galaxy catalog, Lisbeth Olsen for early access the optical cluster catalog, Jon Willis and Dan Maoz for helpful conversations, and our anonymous referee for constructive correspondence. This paper is based on observations obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, at the CFHT, which is operated by the National Research Council of Canada, the Institut National des Science de l'Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii. This paper is also based on spectroscopic observations obtained at the Gemini Observatory which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership; the Very Large Telescope at the European Southern Observatory in Paranal, Chile; theW. M. Keck Observatory which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration; and the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile. This work is based in part on data products from the Canadian Astronomy Data Centre as part of the CFHT Legacy Survey, a collaborative project of NRC and CNRS. This work has been supported by NSERC and the University of Victoria. Facilities: CFHT.Attached Files
Published - GRAaj08.pdf
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Additional details
- Eprint ID
- 14238
- Resolver ID
- CaltechAUTHORS:20090515-133448742
- National Research Council of Canada
- Institut national des sciences de l'Univers (INSU)
- University of Hawaii
- NSF
- European Southern Observatory (ESO)
- W. M. Keck Observatory
- Caltech
- NASA
- Las Campanas Observatory
- Canadian Astronomy Data Centre
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of Victoria
- Centre National de la Recherche Scientifique (CNRS)
- Created
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2009-07-09Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field
- Caltech groups
- Space Astrophysics Laboratory