The type Ia supernova in ratio and infrared galaxies from the Canada-Franch-Hawaii telescope supernova legacy survey

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DOIResolve DOI: http://doi.org/10.1088/0004-6256/139/2/594
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TypeArticle
Journal titleThe Astronomical Journal
ISSN0004-6256
Volume139
Issue2
Pages594605; # of pages: 12
Subjectsupernovae; Canada-France-Hawaii telescope
AbstractWe 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.
Publication date
LanguageEnglish
AffiliationNRC Herzberg Institute of Astrophysics; National Research Council Canada
Peer reviewedYes
NPARC number21275863
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Record identifier076d0029-0556-4c9c-a870-be107d007eb2
Record created2015-07-16
Record modified2016-05-09
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