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Titolo: Peak luminosity-spectral lag relation caused by the viewing angle of the collimated gamma-ray bursts
Autore: Ioka, K; Nakamura, T;
- Indirizzi:
- Kyoto Univ, Dept Phys, Kyoto 6068502, Japan Kyoto Univ Kyoto Japan 6068502 oto Univ, Dept Phys, Kyoto 6068502, Japan Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan Kyoto Univ Kyoto Japan 6068502 a Inst Theoret Phys, Kyoto 6068502, Japan
- Titolo Testata:
- ASTROPHYSICAL JOURNAL
fascicolo: 2,
volume: 554,
anno: 2001,
parte:, 2
pagine: L163 - L167
- SICI:
- 0004-637X(20010629)554:2<L163:PLLRCB>2.0.ZU;2-8
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- INTERNAL SHOCKS; TEMPORAL STRUCTURE; EMISSION; MODEL; AFTERGLOW; FIREBALL; BATSE; GINGA;
- Keywords:
- gamma rays : bursts; gamma rays : theory;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 38
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Ioka, K Kyoto Univ, Dept Phys, Kyoto 6068502, Japan Kyoto Univ Kyoto Japan 6068502 , Dept Phys, Kyoto 6068502, Japan
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- Citazione:
- K. Ioka e T. Nakamura, "Peak luminosity-spectral lag relation caused by the viewing angle of the collimated gamma-ray bursts", ASTROPHYS J, 554(2), 2001, pp. L163-L167
Abstract
We compute the kinematical dependence of the peak luminosity, the pulse width, and the spectral lag of the peak luminosity on the viewing angle theta(v) of a jet. For appropriate model parameters we obtain a peak luminosity-spectral lag relation similar to the observed one including gamma-ray burst (GRB) 980425. A bright (dim) peak with short (long) spectral lag corresponds to a jet with small (large) viewing angle. This suggests that the viewing angle of the jet might cause various relations in GRBs such as the peak luminosity-variability relation and the luminosity-width relation. Our model also suggests that X-ray-rich GRBs (or X-ray flushes or fast X-ray transients) are typical GRBs observed from large theta (v) with large spectral lag and low variability.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/05/13 alle ore 18:37:06