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The Type Ia Supernova Rate in Radio and Infrared Galaxies from the Canada-France-Hawaii Telescope Supernova Legacy Survey

Abstract : We have combined the large SN Ia database of the Canada-France-Hawaii Telescope Supernova Legacy Survey and catalogs of galaxies with photometric redshifts, Very Large Array 1.4 GHz radio sources, and Spitzer infrared sources. We present eight SNe Ia in early-type host galaxies which have counterparts in the radio and infrared source catalogs. We find the SN Ia rate in subsets of radio and infrared early-type galaxies is ~1-5 times the rate in all early-type galaxies, and that any enhancement is always lsim2σ. Rates in these subsets are consistent with predictions of the two-component "A+B" SN Ia rate model. Since infrared properties of radio SN Ia hosts indicate dust-obscured star formation, we incorporate infrared star formation rates into the "A+B" model. We also show the properties of SNe Ia in radio and infrared galaxies suggest the hosts contain dust and support a continuum of delay time distributions (DTDs) for SNe Ia, although other DTDs cannot be ruled out based on our data.
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http://hal.in2p3.fr/in2p3-00453876
Contributor : Julien Guy <>
Submitted on : Monday, February 8, 2010 - 11:08:42 AM
Last modification on : Monday, March 29, 2021 - 3:22:27 PM

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M. L. Graham, C. J. Pritchet, M. Sullivan, D. A. Howell, S. D. J. Gwyn, et al.. The Type Ia Supernova Rate in Radio and Infrared Galaxies from the Canada-France-Hawaii Telescope Supernova Legacy Survey. Astronomical Journal, American Astronomical Society, 2010, 139, pp.594-605. ⟨10.1088/0004-6256/139/2/594⟩. ⟨in2p3-00453876⟩

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