Star Formation Around the Youngest Supernova Remnants in the Large Magellanic Cloud: Implications for Type Ia Supernova Progenitors

We use the star formation history map of the Large Magellanic Cloud recently published by Harris & Zaritsky to study the sites of the four smallest (and presumably youngest) Type la supernova remnants: 0509-67.5, 0519-69.0, N103B and DEM L71. We find that three of the four Type la remnants are a...

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Main Authors: Badenes, C, Harris, J, Zaritsky, D, Prieto, J L
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:We use the star formation history map of the Large Magellanic Cloud recently published by Harris & Zaritsky to study the sites of the four smallest (and presumably youngest) Type la supernova remnants: 0509-67.5, 0519-69.0, N103B and DEM L71. We find that three of the four Type la remnants are associated with old, metal-poor stellar populations, with little or no recent star formation. These include SNR 0509-67.5 which is known to have been originated by an extremely bright SN1991T-like event, and yet is located very far away from any star forming regions. It is very unlikely that this bright Type Ia SN had a young stellar progenitor. The fourth Type Ia remnant, SNR N103B is associated with vigorous star formation activity in the last 100 Myr, and might have had a relatively younger and more massive progenitor.
ISSN:0094-243X