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  Gravitational Wave Damping of Neutron Star Wobble

Cutler, C., & Jones, D. I. (2001). Gravitational Wave Damping of Neutron Star Wobble. Physical Review D, 63, 024002.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-562C-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-562D-7
Genre: Journal Article

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2721.pdf (Publisher version), 105KB
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 Creators:
Cutler, Curt1, Author
Jones, David Ian, Author
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1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:24013              

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 Abstract: We calculate the effect of gravitational wave (gw) back-reaction on realistic neutron stars (NS's) undergoing torque-free precession. By ''realistic' we mean that the NS is treated as a mostly-fluid body with an elastic crust, as opposed to a rigid body. We find that gw's damp NS wobble on a timescale tau_{theta} approx 2 x 10^5 yr [10^{-7}/(DId/I_0)]^2 (kHz/ nu_s)^4, where nu_s is the spin frequency and DId is the piece of the NS's inertia tensor that "follows" the crust's principal axis (as opposed to its spin axis). We give two different derivations of this result: one based solely on energy and angular momentum balance, and another obtained by adding the Burke-Thorne radiation reaction force to the Newtonian equations of motion. This problem was treated long ago by Bertotti and Anile (1973), but their claimed result is wrong. When we convert from their notation to ours, we find that their tau_{theta} is too short by a factor of order 10^5 for typical cases of interest, and even has the wrong sign for DId negative. We show where their calculation went astray.

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Language(s): eng - English
 Dates: 2001
 Publication Status: Published in print
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 Identifiers: eDoc: 2721
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Title: Physical Review D
Source Genre: Journal
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Pages: - Volume / Issue: 63 Sequence Number: - Start / End Page: 024002 Identifier: -