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SN 2010LP-A TYPE IA SUPERNOVA FROM A VIOLENT MERGER OF TWO CARBON-OXYGEN WHITE DWARFS
Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Max Planck Society.
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2013 (English)In: The Astrophysical Journal Letters, ISSN 2041-8205, Vol. 778, no 1, UNSP L18- p.Article in journal (Refereed) Published
Abstract [en]

SN 2010lp is a subluminous Type Ia supernova (SN Ia) with slowly evolving lightcurves. Moreover, it is the only subluminous SN Ia observed so far that shows narrow emission lines of [O I] in late-time spectra, indicating unburned oxygen close to the center of the ejecta. Most explosion models for SNe Ia cannot explain the narrow [O I] emission. Here, we present hydrodynamic explosion and radiative transfer calculations showing that the violent merger of two carbon-oxygen white dwarfs of 0.9 and 0.76 M-circle dot adequately reproduces the early-time observables of SN 2010lp. Moreover, our model predicts oxygen close to the center of the explosion ejecta, a pre-requisite for narrow [O I] emission in nebular spectra as observed in SN 2010lp.

Place, publisher, year, edition, pages
2013. Vol. 778, no 1, UNSP L18- p.
Keyword [en]
binaries: close, hydrodynamics, radiative transfer, supernovae: individual (SN 2010lp)
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-98087DOI: 10.1088/2041-8205/778/1/L18ISI: 000327116700018OAI: oai:DiVA.org:su-98087DiVA: diva2:682505
Note

AuthorCount:9;

Funding agencies:

Deutsche Forschungsgemeinschaft TRR-33; graduate school GRK-1147 " Theoretical Astrophysics and Particle Physics"; Emmy Noether Program RO 3676/1-1; German Ministry of Education Research; European Research Council ERC-StG EXAGAL-308037; Millennium Center for Supernova Science P10-064-F; Fondo de Innovacion para la Competitividad, del Ministerio de Economia, Fomento y Turismo de Chile; Julich Supercomputing Centre hmu14 

Available from: 2013-12-27 Created: 2013-12-27 Last updated: 2013-12-27Bibliographically approved

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