High-Energy Gamma-Ray Production in Microquasars
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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2007
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| _version_ | 1876447890115657728 |
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| author | Mariana Orellana |
| author_facet | Mariana Orellana |
| contents | High-Energy Gamma-Ray Production in Microquasars Mariana Orellana Hugo R. Christiansen Gustavo E. Romero Física, Astronomía y Matemáticas rays sources Galactic gamma A hadronic model for gamma-ray production in microquasars is presented. Microquasars are galactic binarysystems with jets, which have, presumably, hadronic components. We consider a microquasar formed by aneutron star that accretes matter from the equatorial wind of a Be primary star. The collision between thejet, emitted by the compact object, and the dense equatorial disk of the companion massive star is responsiblefor the gamma-ray production. Gamma-rays result from the decay of neutral pions produced in relativisticpp interactions arising from this collision all along the orbit. Assuming a simple, positional independent setof parameters, our calculations are consistent with a peak of gamma-ray flux at the periastron passage witha secondary maximum near apastron. Under this assumption, gamma-ray signals would be in contrast withthe radio/X-ray outbursts which peak clearly after periastron. We finally calculate the opacity of the ambientphoton field to the propagation of the gamma-rays. The spectral energy distribution appears strongly attenuatedin a wide band (50 GeV - 50 TeV) due to local absorption. These spectral features should be detectable by aninstrument like MAGIC through exposures integrated along several periastron passages. 2007 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46437412 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2B Vol.37 |
| format | Artículo científico |
| id | redalyc_46437412 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | High-Energy Gamma-Ray Production in Microquasars Mariana Orellana Física, Astronomía y Matemáticas rays sources Galactic gamma High-Energy Gamma-Ray Production in Microquasars Mariana Orellana Hugo R. Christiansen Gustavo E. Romero Física, Astronomía y Matemáticas rays sources Galactic gamma A hadronic model for gamma-ray production in microquasars is presented. Microquasars are galactic binarysystems with jets, which have, presumably, hadronic components. We consider a microquasar formed by aneutron star that accretes matter from the equatorial wind of a Be primary star. The collision between thejet, emitted by the compact object, and the dense equatorial disk of the companion massive star is responsiblefor the gamma-ray production. Gamma-rays result from the decay of neutral pions produced in relativisticpp interactions arising from this collision all along the orbit. Assuming a simple, positional independent setof parameters, our calculations are consistent with a peak of gamma-ray flux at the periastron passage witha secondary maximum near apastron. Under this assumption, gamma-ray signals would be in contrast withthe radio/X-ray outbursts which peak clearly after periastron. We finally calculate the opacity of the ambientphoton field to the propagation of the gamma-rays. The spectral energy distribution appears strongly attenuatedin a wide band (50 GeV - 50 TeV) due to local absorption. These spectral features should be detectable by aninstrument like MAGIC through exposures integrated along several periastron passages. 2007 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46437412 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2B Vol.37 |
| title | High-Energy Gamma-Ray Production in Microquasars |
| topic | Física, Astronomía y Matemáticas rays sources Galactic gamma |
| url | https://www.redalyc.org/articulo.oa?id=46437412 |