Different approaches to the study of the gravitational radiation emitted by astrophysical sources

Details Different approaches to the study of the gravitational radiation emitted by astrophysical sources Different approaches to the study of the gravitational radiation emitted by astrophysical sources

1999-12-17

arxiv.org/abs/gr-qc/9912074v2

Annalen Phys.1:3-17,2000

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

21 pages, 7 figures, Latex, accepted for publication in Annalen der Physik

Scientific paper

10.1002/(SICI)1521-3889(200001)9

Stars and black holes are sources of gravitational radiation in many phases of their life, and the signals they emit exhibit features that are characteristic of the generating process. Emitted since the beginning of star formation, these signals also contribute to create a stochastic background of gravitational waves. We shall show how the spectral properties of this background can be estimated in terms of the energy spectrum of each single event and of the star formation rate history, which is now deducible from astronomical observations. We shall further discuss the process of scattering of masses by stars and black holes, showing that, unlike black holes, stars emit signals that carry a clear signature of the nature of the source.

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