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| Título: | High-energy gamma-ray production in microquasars |
| Autor(es): | Christiansen, Hugo Romero, Gustavo E. Orellana, Mariana Dominga |
| Fecha de publicación: | jun-2007 |
| Citación: | Christiansen, Hugo., Romero, Gustavo E. & Orellana, Mariana D. (2007). High-energy gamma-ray production in microquasars. Sociedad Brasileira Fisica. Brazilian Journal Of Physics; 37; 2B; 545-548 |
| Revista: | Brazilian Journal Of Physics |
| Resumen: | A hadronic model for gamma-ray production in microquasars is presented. Microquasars are galactic binary systems with jets, which have, presumably, hadronic components. We consider a microquasar formed by a neutron star that accretes matter from the equatorial wind of a Be primary star. The collision between the jet, emitted by the compact object, and the dense equatorial disk of the companion massive star is responsible for the gamma-ray production. Gamma-rays result from the decay of neutral pions produced in relativistic pp interactions arising from this collision all along the orbit. Assuming a simple, positional independent set of parameters, our calculations are consistent with a peak of gamma-ray flux at the periastron passage with a secondary maximum near apastron. Under this assumption, gamma-ray signals would be in contrast with the radio/X-ray outbursts which peak clearly after periastron. We finally calculate the opacity of the ambient photon field to the propagation of the gamma-rays. The spectral energy distribution appears strongly attenuated in a wide band (50 GeV - 50 TeV) due to local absorption. These spectral features should be detectable by an instrument like MAGIC through exposures integrated along several periastron passages. |
| URI: | http://ref.scielo.org/gsfhzh http://hdl.handle.net/11336/22323 https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2826 |
| Identificador DOI: | http://dx.doi.org/10.1590/S0103-97332007000400012 |
| ISSN: | 1678-4448 |
| Aparece en las colecciones: | Artículos |
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| Archivo | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| High-energy gamma-ray production in microquasars.pdf | 283,66 kB | Adobe PDF | Visualizar/Abrir |
Este documento es resultado del financiamiento otorgado por el Estado Nacional, por lo tanto queda sujeto al cumplimiento de la Ley N° 26.899
Esta obra está bajo una Licencia Creative Commons Atribución-NoComercial-CompartirIgual 4.0 Internacional.