Constraining the progenitor of the type Ia SN 2014J with the EVN and eMERLIN
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2014

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). 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. On the contrary, our stringent upper limits to the radio emission from SN 2014 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. Thus, the evidence from SNe 2011fe and 2014J points in the direction of a double-degenerate scenario for both. Looking into the future, we note that the huge improvement in sensitivity of the SKA with respect to its predecessors will allow us to determine which progenitor scenario (single-degenerate vs. double-degenerate) applies to a large sample of nearby Type Ia SNe, thus unambiguously solving this issue. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

Författare

Miguel Angel Perez-Torres

CSIC - Instituto de Astrofísica de Andalucía (IAA)

Centro de Estudios de Física del Cosmos de Aragón

P. Lundqvist

Stockholms universitet

The Oskar Klein Centre

R. J. Beswick

The Oskar Klein Centre

C. I. Bjornsson

Stockholms universitet

T .W. B. Muxlow

University of Manchester

Z. Paragi

Joint Institute for VLBI in Europe

S. Ryder

Universitat de Valencia

Antxon Alberdi

CSIC - Instituto de Astrofísica de Andalucía (IAA)

C. Fransson

Stockholms universitet

The Oskar Klein Centre

J. M. Marcaide

Universitat de Valencia

Ivan Marti-Vidal

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Eduardo Ros

Universitat de Valencia

Max Planck-institutet

M. K. Argo

University of Manchester

J. C. Guirado

Universitat de Valencia

Proceedings of Science. 12th European VLBI Network Symposium and Users Meeting, EVN 2014 ; Cagliari; Italy; 7 October 2014 through 10 October 2014

1824-8039 (eISSN)

Vol. Part F113821 052-

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fundament

Grundläggande vetenskaper