Abstract
We report the deepest radio interferometric observations of the closest Type Ia supernova in decades, SN 2014J, which exploded in the nearby galaxy M 82. These observations represent, together with radio observations of SNe 2011fe, the most sensitive radio studies of a Type Ia SN ever. We constrain the mass-loss rate from the progenitor system of SN 2014J to M ≲ 7.0 × 10−10 M☉ yr−1 (for a wind speed of 100 km s−1). Our deep upper limits favor a double-degenerate scenario-involving two WD stars-for the progenitor system of SN 2014J, as such systems have less circumstellar gas than our upper limits. By contrast, most single-degenerate scenarios, i.e., the wide family of progenitor systems where a red giant, main-sequence, or sub-giant star donates mass to a exploding white dwarf, are ruled out by our observations. The evidence from SNe 2011fe and 2014J points in the direction of a double-degenerate scenario for both.
| Original language | English |
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| Title of host publication | Highlights of Spanish Astrophysics VIII |
| Subtitle of host publication | Proceedings of the XI Scientific Meeting of the Spanish Astronomical Society (SEA) held in Teruel, September 8-12, 2014 |
| Place of Publication | Teruel |
| Publisher | Spanish Astronomical Society |
| Pages | 540-546 |
| Number of pages | 7 |
| ISBN (Print) | 9788460687603 |
| Publication status | Published - 2014 |
| Externally published | Yes |
| Event | 11th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics VIII, SEA 2014 - Teruel, Spain Duration: 8 Sept 2014 → 12 Sept 2014 |
Conference
| Conference | 11th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics VIII, SEA 2014 |
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| Country/Territory | Spain |
| City | Teruel |
| Period | 8/09/14 → 12/09/14 |