DYNAMICAL CAPTURE BINARY NEUTRON STAR MERGERS

We study dynamical capture binary neutron star mergers as may arise in dense stellar regions such as globular clusters. Using general-relativistic hydrodynamics, we find that these mergers can result in the prompt collapse to a black hole or in the formation of a hypermassive neutron star, depending...

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Bibliographic Details
Published in:Astrophysical journal. Letters 2012-11, Vol.760 (1), p.1-6
Main Authors: East, William E, Pretorius, Frans
Format: Article
Language:English
Subjects:
ACCRETION DISKS
Acquisitions
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BINARY STARS
BLACK HOLES
Black holes (astronomy)
CAPTURE
Collapse
COSMIC GAMMA BURSTS
EQUATIONS OF STATE
Fluid dynamics
Fluid flow
Formations
GALAXY CLUSTERS
GRAVITATIONAL COLLAPSE
GRAVITATIONAL RADIATION
HYDRODYNAMICS
IMPACT PARAMETER
MASS
NEUTRON STARS
RELATIVISTIC RANGE
SUPERMASSIVE STARS
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Summary:We study dynamical capture binary neutron star mergers as may arise in dense stellar regions such as globular clusters. Using general-relativistic hydrodynamics, we find that these mergers can result in the prompt collapse to a black hole or in the formation of a hypermassive neutron star, depending not only on the neutron star equation of state but also on impact parameter. We also find that these mergers can produce accretion disks of up to a tenth of a solar mass and unbound ejected material of up to a few percent of a solar mass. We comment on the gravitational radiation and electromagnetic transients that these sources may produce.
ISSN:2041-8205
2041-8213
DOI:10.1088/2041-8205/760/1/L4