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Constraining Type Ia Supernovae progenitors from three years of SNLS data
B. Bianco F., A. Howell D., Sullivan M., Conley A., Kasen D. et al
Astrophysical Journal 741 (2011) 20 - http://hal.in2p3.fr/in2p3-00739656
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique
Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique
Planète et Univers/Astrophysique/Astrophysique stellaire et solaire
Physique/Astrophysique/Astrophysique stellaire et solaire
Constraining Type Ia Supernovae progenitors from three years of SNLS data
F. B. Bianco, D. A. Howell, M. Sullivan, A. Conley, D. Kasen, S. González-Gaitán, J. Guy1, P. Astier1, C. Balland1, 2, R.G. Carlberg, D. Fouchez3, N. Fourmanoit1, D. Hardin1, I. Hook, C. Lidman, R. Pain1, N. Palanque-Delabrouille4, S. Perlmutter, K.M. Perrett, C.J. Pritchet, N. Regnault1, J. Rich4, V. Ruhlmann-Kleider4
1 :  LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
http://www-lpnhep.in2p3.fr
CNRS : UMR7585 – IN2P3 – Université Pierre et Marie Curie (UPMC) - Paris VI – Université Paris VII - Paris Diderot
Barre 12-22, 1er étage 4 Place Jussieu 75252 Paris Cedex 05
France
2 :  UP11 - Université Paris 11, Paris Sud
http://www.u-psud.fr/
Université Paris XI - Paris Sud – Ministère de l'Enseignement Supérieur et de la Recherche Scientifique
Bât. 300 - 91405 Orsay cedex
France
3 :  CPPM - Centre de Physique des Particules de Marseille
http://marwww.in2p3.fr/
CNRS : UMR7346 – IN2P3 – Université de la Méditerranée - Aix-Marseille II
163, avenue de Luminy - Case 902 - 13288 Marseille cedex 09
France
4 :  SPP - Service de Physique des Particules
http://www-dapnia.cea.fr/Spp/
CEA : DSM/IRFU
France
While it is generally accepted that Type Ia supernovae are the result of the explosion of a carbon-oxygen White Dwarf accreting mass in a binary system, the details of their genesis still elude us, and the nature of the binary companion is uncertain. Kasen (2010) points out that the presence of a non-degenerate companion in the progenitor system could leave an observable trace: a flux excess in the early rise portion of the lightcurve caused by the ejecta impact with the companion itself. This excess would be observable only under favorable viewing angles, and its intensity depends on the nature of the companion. We searched for the signature of a non-degenerate companion in three years of Supernova Legacy Survey data by generating synthetic lightcurves accounting for the effects of shocking and comparing true and synthetic time series with Kolmogorov-Smirnov tests. Our most constraining result comes from noting that the shocking effect is more prominent in rest-frame B than V band: we rule out a contribution from white dwarf-red giant binary systems to Type Ia supernova explosions greater than 10% at 2 sigma, and than 20% at 3 sigma level.

Articles dans des revues avec comité de lecture
2011
Astrophysical Journal (Astrophys. J.)
Publisher American Astronomical Society
ISSN 0004-637X 
741
20
© 2012 IOP Publishing

14 pages, 15 figures, resubmitted to ApJ, figure 15 modified
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/1106.4008