### Abstract

Original language | English |
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Title of host publication | 13th Conference on Recent Developments in Gravity (NEBXIII) |

Editors | N Stergioulas, C Tsagas |

Place of Publication | Greece |

Publisher | IOP Publishing |

Pages | 12023 - 12029 |

Number of pages | 7 |

Volume | 189 |

Publication status | Published - 2009 |

Event | Conference on Recent Developments in Gravity (NEB) - Thessaloniki Greece, Greece Duration: 1 Jan 2009 → … |

### Conference

Conference | Conference on Recent Developments in Gravity (NEB) |
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City | Greece |

Period | 1/01/09 → … |

### Cite this

*13th Conference on Recent Developments in Gravity (NEBXIII)*(Vol. 189, pp. 12023 - 12029). Greece: IOP Publishing.

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*13th Conference on Recent Developments in Gravity (NEBXIII).*vol. 189, IOP Publishing, Greece, pp. 12023 - 12029, Conference on Recent Developments in Gravity (NEB), Greece, 1/01/09.

**Gravitational waves from gauge-invariant perturbations of spherically symmetric spacetimes.** / Lasky, Paul Daniel.

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

TY - GEN

T1 - Gravitational waves from gauge-invariant perturbations of spherically symmetric spacetimes

AU - Lasky, Paul Daniel

PY - 2009

Y1 - 2009

N2 - One difficulty associated with perturbations of spherical collapse models in General Relativity is attributed to the junction conditions required at the interface of the interior matter-filled region and the exterior vacuum region. This implies extracting information about gravitational waves at spacelike infinity is also a difficult task. In this talk, I present a method which eliminates the need for junction conditions in both the background and perturbed spacetimes, thereby allowing relatively simple modelling of gravitational waveforms. This is achieved by using a recently developed method that enables a single line element to be expressed for the entire spherically symmetric background spacetime. Perturbing this spacetime in a gauge-invariant manner implies junction conditions are not required at any stage of the perturbation. Wave equations are derived for the Newman-Penrose Weyl scalars which hold in both the matter filled regions of the spacetime as well as the vacuum exterior regions.

AB - One difficulty associated with perturbations of spherical collapse models in General Relativity is attributed to the junction conditions required at the interface of the interior matter-filled region and the exterior vacuum region. This implies extracting information about gravitational waves at spacelike infinity is also a difficult task. In this talk, I present a method which eliminates the need for junction conditions in both the background and perturbed spacetimes, thereby allowing relatively simple modelling of gravitational waveforms. This is achieved by using a recently developed method that enables a single line element to be expressed for the entire spherically symmetric background spacetime. Perturbing this spacetime in a gauge-invariant manner implies junction conditions are not required at any stage of the perturbation. Wave equations are derived for the Newman-Penrose Weyl scalars which hold in both the matter filled regions of the spacetime as well as the vacuum exterior regions.

UR - http://iopscience.iop.org/1742-6596/189/1/012023/pdf/1742-6596_189_1_012023.pdf

M3 - Conference Paper

VL - 189

SP - 12023

EP - 12029

BT - 13th Conference on Recent Developments in Gravity (NEBXIII)

A2 - Stergioulas, N

A2 - Tsagas, C

PB - IOP Publishing

CY - Greece

ER -