REMNANTS OF BINARY WHITE DWARF MERGERS
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.
- Authors:
-
- School of Earth and Space Exploration, Arizona State University, P.O. Box 871404, Tempe, AZ 85287-1404 (United States)
- Los Alamos National Laboratories, Los Alamos, NM 87545 (United States)
- Publication Date:
- OSTI Identifier:
- 22011784
- Resource Type:
- Journal Article
- Journal Name:
- Astrophysical Journal
- Additional Journal Information:
- Journal Volume: 746; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; CARBON; COMPUTERIZED SIMULATION; EXPLOSIONS; HELIUM; HYDRODYNAMICS; NUCLEOSYNTHESIS; SUPERNOVAE; WHITE DWARF STARS
Citation Formats
Raskin, Cody, Scannapieco, Evan, Timmes, F X, Fryer, Chris, and Rockefeller, Gabriel. REMNANTS OF BINARY WHITE DWARF MERGERS. United States: N. p., 2012.
Web. doi:10.1088/0004-637X/746/1/62.
Raskin, Cody, Scannapieco, Evan, Timmes, F X, Fryer, Chris, & Rockefeller, Gabriel. REMNANTS OF BINARY WHITE DWARF MERGERS. United States. https://doi.org/10.1088/0004-637X/746/1/62
Raskin, Cody, Scannapieco, Evan, Timmes, F X, Fryer, Chris, and Rockefeller, Gabriel. 2012.
"REMNANTS OF BINARY WHITE DWARF MERGERS". United States. https://doi.org/10.1088/0004-637X/746/1/62.
@article{osti_22011784,
title = {REMNANTS OF BINARY WHITE DWARF MERGERS},
author = {Raskin, Cody and Scannapieco, Evan and Timmes, F X and Fryer, Chris and Rockefeller, Gabriel},
abstractNote = {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.},
doi = {10.1088/0004-637X/746/1/62},
url = {https://www.osti.gov/biblio/22011784},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 746,
place = {United States},
year = {Fri Feb 10 00:00:00 EST 2012},
month = {Fri Feb 10 00:00:00 EST 2012}
}