Gamma-rays from the binary system containing PSR J2032+4127 during its periastron passage
| Autor: | Bednarek, Wlodek, Banasinski, Piotr, Sitarek, Julian |
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| Rok vydání: | 2017 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1361-6471/aa97ee |
| Popis: | The energetic pulsar, PSR J2032+4127, has been recently discovered in the direction of the unidentified HEGRA TeV gamma-ray source (TeV J2032+4130). It is proposed that this pulsar forms a binary system with the Be type star, MT91 213, expected to reach the periastron late in 2017. We performed detailed calculations of the gamma-ray emission produced close to the binary system's periastron passage by applying a simple geometrical model. Electrons accelerated at the collision region of pulsar and stellar winds initiate anisotropic Inverse Compton electron-positron pair cascades by scattering soft radiation from the massive companion. The gamma-ray spectra, from such a comptonization process, are confronted with the measurements of the extended TeV gamma-ray emission from the HEGRA TeV gamma-ray source. We discuss conditions within the binary system, at the periastron passage of the pulsar, for which the gamma-ray emission from the binary can overcome the extended, steady TeV gamma-ray emission from the HEGRA TeV gamma-ray source. Comment: 19 pages, 8 figures, Journal of Physics G, accepted |
| Databáze: | arXiv |
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