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We have combined the large SN Ia database of the Canada-France-HawaiiTelescope Supernova Legacy Survey and catalogs of galaxies with photometricredshifts, VLA 1.4 GHz radio sources, and Spitzer infrared sources. We presenteight SNe Ia in early-type host galaxies which have counterparts in the radioand infrared source catalogs. We find the SN Ia rate in subsets of radio andinfrared early-type galaxies is ~1-5 times the rate in all early-type galaxies,and that any enhancement is always <~ 2 sigma. Rates in these subsets areconsistent with predictions of the two component "A+B" SN Ia rate model. Sinceinfrared properties of radio SN Ia hosts indicate dust obscured star formation,we incorporate infrared star formation rates into the "A+B" model. We also showthe properties of SNe Ia in radio and infrared galaxies suggest the hostscontain dust and support a continuum of delay time distributions for SNe Ia,although other delay time distributions cannot be ruled out based on our data.

The Type Ia Supernova Rate in Radio and Infrared Galaxies from the CFHT Supernova Legacy Survey