Abstract
We carry out a comprehensive smooth particle hydrodynamics simulation survey of double-degenerate white dwarf binary mergers of varying mass combinations in order to establish correspondence between initial conditions and remnant configurations. We find that all but one of our simulation remnants share general properties such as a cold, degenerate core surrounded by a hot disk, while our least massive pair of stars forms only a hot disk. We characterize our remnant configurations by the core mass, the rotational velocity of the core, and the half-mass radius of the disk. We also find that some of our simulations with very massive constituent stars exhibit helium detonations on the surface of the primary star before complete disruption of the secondary. However, these helium detonations are insufficiently energetic to ignite carbon, and so do not lead to prompt carbon detonations.
| Original language | English (US) |
|---|---|
| Article number | 62 |
| Journal | Astrophysical Journal |
| Volume | 746 |
| Issue number | 1 |
| DOIs | |
| State | Published - Feb 10 2012 |
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Keywords
- hydrodynamics
- nuclear reactions, nucleosynthesis, abundances
- supernovae: general
- white dwarfs Online-only material: color figures
ASJC Scopus subject areas
- Space and Planetary Science
- Astronomy and Astrophysics
Cite this
Remnants of binary white dwarf mergers. / Raskin, Cody; Scannapieco, Evan; Fryer, Chris; Rockefeller, Gabriel; Timmes, Francis.
In: Astrophysical Journal, Vol. 746, No. 1, 62, 10.02.2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Remnants of binary white dwarf mergers
AU - Raskin, Cody
AU - Scannapieco, Evan
AU - Fryer, Chris
AU - Rockefeller, Gabriel
AU - Timmes, Francis
PY - 2012/2/10
Y1 - 2012/2/10
N2 - We carry out a comprehensive smooth particle hydrodynamics simulation survey of double-degenerate white dwarf binary mergers of varying mass combinations in order to establish correspondence between initial conditions and remnant configurations. We find that all but one of our simulation remnants share general properties such as a cold, degenerate core surrounded by a hot disk, while our least massive pair of stars forms only a hot disk. We characterize our remnant configurations by the core mass, the rotational velocity of the core, and the half-mass radius of the disk. We also find that some of our simulations with very massive constituent stars exhibit helium detonations on the surface of the primary star before complete disruption of the secondary. However, these helium detonations are insufficiently energetic to ignite carbon, and so do not lead to prompt carbon detonations.
AB - We carry out a comprehensive smooth particle hydrodynamics simulation survey of double-degenerate white dwarf binary mergers of varying mass combinations in order to establish correspondence between initial conditions and remnant configurations. We find that all but one of our simulation remnants share general properties such as a cold, degenerate core surrounded by a hot disk, while our least massive pair of stars forms only a hot disk. We characterize our remnant configurations by the core mass, the rotational velocity of the core, and the half-mass radius of the disk. We also find that some of our simulations with very massive constituent stars exhibit helium detonations on the surface of the primary star before complete disruption of the secondary. However, these helium detonations are insufficiently energetic to ignite carbon, and so do not lead to prompt carbon detonations.
KW - hydrodynamics
KW - nuclear reactions, nucleosynthesis, abundances
KW - supernovae: general
KW - white dwarfs Online-only material: color figures
UR - http://www.scopus.com/inward/record.url?scp=84856250248&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84856250248&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/746/1/62
DO - 10.1088/0004-637X/746/1/62
M3 - Article
AN - SCOPUS:84856250248
VL - 746
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
M1 - 62
ER -