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 dot{M} ≲ 7.0EE{-10} msunyr (for a wind speed of 100 kms). 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 |
|---|---|
| Title of host publication | Highlights of Spanish Astrophysics VIII, Proceedings of the XI Scientific Meeting of the Spanish Astronomical Society |
| Editors | A J Cenarro |
| Pages | 540-546 |
| Number of pages | 7 |
| Publication status | Published - May 2015 |
| Event | Highlights of Spanish Astrophysics VIII - Duration: 1 Jan 1824 → … http://adsabs.harvard.edu/abs/2015hsa8.conf..540P |
Conference
| Conference | Highlights of Spanish Astrophysics VIII |
|---|---|
| Period | 1/01/24 → … |
| Internet address |