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Close-limit approximation to neutron star collisions

Close-limit approximation to neutron star collisions
Close-limit approximation to neutron star collisions
We develop a close-limit approximation to the head-on collision of two neutron stars similar to that used to treat the merger of black hole binaries. This approximation can serve as a useful benchmark test for future fully non-linear studies. For neutron star binaries, the close-limit approximation involves assuming that the merged object can be approximated as a perturbed, stable neutron star during the ring-down phase of the coalescence. We introduce a prescription for the construction of initial data sets, discuss the physical plausibility of the various assumptions involved, and briefly investigate the character of the gravitational radiation produced during the merger. The numerical results show that several of the merged object's fluid pulsation modes are excited to a significant level.
1550-7998
104021-[9pp]
Allen, Gabrielle D.
b6755f37-a623-42c7-b612-6f33d2aaa92b
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Kokkotas, Kostas D.
0b8bb98a-a65f-434b-855b-ec5b488b4a96
Laguna, Pablo
c1176fd8-1ef9-4f66-87b7-3b705e49b347
Pullin, Jorge A.
69bad56b-12d0-48a2-a37c-21b79b6d09eb
Ruoff, Johannes
6d5b9e70-091d-43f0-aa4d-758b7338ecd6
Allen, Gabrielle D.
b6755f37-a623-42c7-b612-6f33d2aaa92b
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Kokkotas, Kostas D.
0b8bb98a-a65f-434b-855b-ec5b488b4a96
Laguna, Pablo
c1176fd8-1ef9-4f66-87b7-3b705e49b347
Pullin, Jorge A.
69bad56b-12d0-48a2-a37c-21b79b6d09eb
Ruoff, Johannes
6d5b9e70-091d-43f0-aa4d-758b7338ecd6

Allen, Gabrielle D., Andersson, Nils, Kokkotas, Kostas D., Laguna, Pablo, Pullin, Jorge A. and Ruoff, Johannes (1999) Close-limit approximation to neutron star collisions. Physical Review D, 60, 104021-[9pp]. (doi:10.1103/PhysRevD.60.104021).

Record type: Article

Abstract

We develop a close-limit approximation to the head-on collision of two neutron stars similar to that used to treat the merger of black hole binaries. This approximation can serve as a useful benchmark test for future fully non-linear studies. For neutron star binaries, the close-limit approximation involves assuming that the merged object can be approximated as a perturbed, stable neutron star during the ring-down phase of the coalescence. We introduce a prescription for the construction of initial data sets, discuss the physical plausibility of the various assumptions involved, and briefly investigate the character of the gravitational radiation produced during the merger. The numerical results show that several of the merged object's fluid pulsation modes are excited to a significant level.

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Published date: 1999

Identifiers

Local EPrints ID: 29426
URI: http://eprints.soton.ac.uk/id/eprint/29426
ISSN: 1550-7998
PURE UUID: 4b228739-850c-4b68-b24c-16cc253753c3
ORCID for Nils Andersson: ORCID iD orcid.org/0000-0001-8550-3843

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Date deposited: 12 May 2006
Last modified: 26 Nov 2019 01:56

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Contributors

Author: Gabrielle D. Allen
Author: Nils Andersson ORCID iD
Author: Kostas D. Kokkotas
Author: Pablo Laguna
Author: Jorge A. Pullin
Author: Johannes Ruoff

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