TY - JOUR
T1 - The response of a helium white dwarf to an exploding Type Ia supernova
AU - Papish, Oded
AU - Soker, Noam
AU - García-Berro, Enrique
AU - Aznar-Siguán, Gabriela
N1 - Publisher Copyright:
© 2015 The Authors.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/2/23
Y1 - 2015/2/23
N2 - We conduct numerical simulations of the interacting ejecta from an exploding CO white dwarf (WD) with a He WD donor in the double-detonation scenario for Type Ia supernovae (SNe Ia), and study the possibility of exploding the companion WD. We also study the long time imprint of the collision on the supernova remnant. When the donor He WD has a low mass, MWD = 0.2M⊙, it is at a distance of 0.08 R⊙ from the explosion, and helium is not ignited. The low-mass He WD casts an 'ejecta shadow' behind it. By evolving the ejecta for longer times, we find that the outer parts of the shadowed side are fainter and its boundary with the ambient gas is somewhat flat. More massive He WD donors, MWD ≃ 0.4M⊙, must be closer to the CO WD to transfer mass. At a distance of a ≤ 0.045R⊙ helium is detonated and the He WD explodes, leading to a triple detonation scenario. In the explosion of the donor WD approximately 0.15M⊙ of unburned helium is ejected. This might be observed as a peculiar Type Ib supernova.
AB - We conduct numerical simulations of the interacting ejecta from an exploding CO white dwarf (WD) with a He WD donor in the double-detonation scenario for Type Ia supernovae (SNe Ia), and study the possibility of exploding the companion WD. We also study the long time imprint of the collision on the supernova remnant. When the donor He WD has a low mass, MWD = 0.2M⊙, it is at a distance of 0.08 R⊙ from the explosion, and helium is not ignited. The low-mass He WD casts an 'ejecta shadow' behind it. By evolving the ejecta for longer times, we find that the outer parts of the shadowed side are fainter and its boundary with the ambient gas is somewhat flat. More massive He WD donors, MWD ≃ 0.4M⊙, must be closer to the CO WD to transfer mass. At a distance of a ≤ 0.045R⊙ helium is detonated and the He WD explodes, leading to a triple detonation scenario. In the explosion of the donor WD approximately 0.15M⊙ of unburned helium is ejected. This might be observed as a peculiar Type Ib supernova.
KW - Binaries: close
KW - Hydrodynamics
KW - ISM: supernova remnants
KW - Supernovae: general
UR - http://www.scopus.com/inward/record.url?scp=84930857626&partnerID=8YFLogxK
U2 - 10.1093/mnras/stv337
DO - 10.1093/mnras/stv337
M3 - 文章
AN - SCOPUS:84930857626
VL - 449
SP - 942
EP - 954
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 1
ER -