Abundances and Transients from Neutron Star-White Dwarf Mergers

被引：17
作者：
Kaltenborn, M. Alexander R. [1 ,2 ,3 ]
Fryer, Chris L. [1 ,3 ,4 ,5 ,6 ]
Wollaeger, Ryan T. [3 ,4 ,7 ]
Belczynski, Krzysztof [8 ]
Even, Wesley [2 ,3 ]
Kouveliotou, Chryssa [1 ]
机构：
[1] George Washington Univ, Dept Phys & Astron, Washington, DC 20052 USA
[2] Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA
[3] Los Alamos Natl Lab, Ctr Theoret Astrophys, Los Alamos, NM 87545 USA
[4] Los Alamos Natl Lab, Comp Computat & Stat Sci Div, Los Alamos, NM 87545 USA
[5] Univ Arizona, Tucson, AZ 85721 USA
[6] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA
[7] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
[8] Polish Acad Sci, Nicolaus Copernicus Astron Ctr, 18 Bartycka St, PL-00716 Warsaw, Poland
来源：
ASTROPHYSICAL JOURNAL | 2023年 / 956卷 / 02期
基金：
美国国家科学基金会;
关键词：
NUCLEAR-DOMINATED ACCRETION; RICH GAP TRANSIENTS; MONTE-CARLO METHOD; GAMMA-RAY BURSTS; HELIUM SHELL DETONATIONS; CORE-COLLAPSE SUPERNOVAE; BLACK-HOLES; GRAVITATIONAL-WAVES; MASS-TRANSFER; ELECTROMAGNETIC COUNTERPARTS;
D O I：
10.3847/1538-4357/acf860
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We systematically investigate the mergers of neutron star-white dwarf binaries from beginning to end, with a focus on the properties of the inflows and outflows in accretion disks and their electromagnetic emissions. Using population synthesis models, we determine a subset of these binaries in which the white dwarf companion undergoes unstable mass transfer and complete tidal disruption, forming a large accretion disk around the neutron star. The material evolves according to a one-dimensional advection-dominated accretion-disk model with nuclear burning, neutrino emissions, and disk-surface wind ejection. The extreme dynamics of the entire process have proven difficult to analyze, and thus currently, the properties are poorly understood. The outflows from the mergers are iron- and nickel-rich, giving rise to optical and infrared emissions powered by the decay of the radioactive iron-type isotopes, calculated via the SuperNu light-curve code. We find these systems capable of powering bright, yet short-lived, optical transients with the potential to power gamma-ray bursts.
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页数：24
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