TY - JOUR
T1 - Constraining the double-degenerate scenario for Type Ia supernovae from merger ejected matter
AU - Levanon, Naveh
AU - Soker, Noam
AU - García-Berro, Enrique
N1 - Publisher Copyright:
© 2015 The Authors.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015
Y1 - 2015
N2 - We follow the mass expelled during the WD-WD merger process in a particular case of the double-degenerate (DD) scenario for Type Ia supernovae (SNe Ia), and find that the interaction of the SN ejecta with the resulting wind affects the early (first day) light-curve in a way that may be in conflict with some SN Ia observations, if the detonation occurs shortly after the merger, i.e. (103 s ≲ texp ≲ 1 d). The main source of the expelled mass is a disc-wind, or jets that are launched by the accretion disc around the more massive white dwarf (WD) during the viscous phase of the merger. This disc-originated matter will be shocked and heated by the SN ejecta from an explosion, leading to additional radiation in the early light-curve. This enhanced early radiation could then be interpreted as an explosion originating from a progenitor having an inferred radius of one solar radius or more, in conflict with observations of SN 2011fe.
AB - We follow the mass expelled during the WD-WD merger process in a particular case of the double-degenerate (DD) scenario for Type Ia supernovae (SNe Ia), and find that the interaction of the SN ejecta with the resulting wind affects the early (first day) light-curve in a way that may be in conflict with some SN Ia observations, if the detonation occurs shortly after the merger, i.e. (103 s ≲ texp ≲ 1 d). The main source of the expelled mass is a disc-wind, or jets that are launched by the accretion disc around the more massive white dwarf (WD) during the viscous phase of the merger. This disc-originated matter will be shocked and heated by the SN ejecta from an explosion, leading to additional radiation in the early light-curve. This enhanced early radiation could then be interpreted as an explosion originating from a progenitor having an inferred radius of one solar radius or more, in conflict with observations of SN 2011fe.
KW - Accretion, accretion discs
KW - Binaries: close
KW - Hydrodynamics
KW - Supernovae: general
KW - White dwarfs
UR - http://www.scopus.com/inward/record.url?scp=84929198907&partnerID=8YFLogxK
U2 - 10.1093/mnras/stu2580
DO - 10.1093/mnras/stu2580
M3 - 文章
AN - SCOPUS:84929198907
VL - 447
SP - 2803
EP - 2809
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 3
ER -