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Titolo: Radiative acceleration in Schwarzschild space-times
Autore: Keane, AJ; Barrett, RK; Simmons, JFL;
- Indirizzi:
- Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland Univ Glasgow Glasgow Lanark Scotland G12 8QQ ow G12 8QQ, Lanark, Scotland
- Titolo Testata:
- MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
fascicolo: 4,
volume: 321,
anno: 2001,
pagine: 661 - 677
- SICI:
- 0035-8711(200103)321:4<661:RAISS>2.0.ZU;2-F
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- JETS;
- Keywords:
- accretion, accretion discs; black hole physics; radiative transfer; relativity; stars : neutron;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 11
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Keane, AJ Dalhousie Univ, Dept Math, Halifax, NS B3H 3J5, Canada DalhousieUniv Halifax NS Canada B3H 3J5 ax, NS B3H 3J5, Canada
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- Citazione:
- A.J. Keane et al., "Radiative acceleration in Schwarzschild space-times", M NOT R AST, 321(4), 2001, pp. 661-677
Abstract
We examine the radial motion of a material particle in the intense radiation field of a static spherically symmetric compact object with spherical emitting surface outside the Schwarzschild radius. This paper generalizes previous work which dealt with radial motion in the Thomson limit, where the radiation force is simply proportional to the radiative flux. In the generalcase the average time component of the 4-momentum transferred to the particle is not negligible compared with its rest mass. Consequently, we find that the frequency dependence of the radiation force owing to Compton scattering for highly energetic photons gives rise to an increase in the effectivemass of the test particle. In this work we outline the effects of this frequency dependence and compare these with the results in the Thomson limit. We present the frequency dependent saturation velocity curves for a range of stellar luminosities and radiation frequencies and present the resulting phase-space diagrams corresponding to the radial test particle trajectories. In particular, the stable equilibrium points which exist in the Thomson limit are found to be absent in the general case.
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Documento generato il 21/05/13 alle ore 07:33:07