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Letter to the editor. Gravitational waves from ultracompact stars: the optical geometry view of trapped modes

Record type: Article

Ultracompact stars - if they exist - have a unique signature: a discrete spectrum of slowly damped gravitational-wave quasinormal modes. It is known that this feature is due to a potential well present for stars with R<3M. In this letter we show that the appearance of this well is essentially due to the non-Newtonian behaviour of the centrifugal potential: here we explain this behaviour adopting the optical geometry point of view. This insight leads us to an approximation, valid for highly compact stars, by which the real part of the spectrum is easily computed with good accuracy.

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Citation

Abramowicz, M.A., Andersson, N., Bruni, M., Ghosh, P. and Sonego, S. (1997) Letter to the editor. Gravitational waves from ultracompact stars: the optical geometry view of trapped modes Classical and Quantum Gravity, 14, (12), L189-L194.

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Published date: 1997

Identifiers

Local EPrints ID: 29166
URI: http://eprints.soton.ac.uk/id/eprint/29166
ISSN: 0264-9381
PURE UUID: 5094cba4-c160-4295-b4e2-ce35870f54a0

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Date deposited: 07 Feb 2007
Last modified: 17 Jul 2017 15:58

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Contributors

Author: M.A. Abramowicz
Author: N. Andersson
Author: M. Bruni
Author: P. Ghosh
Author: S. Sonego

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