Is the bowshock of the runaway massive star HD 195592 a Fermi source?
Context. HD 195592 is an O-type super-giant star, known as a well-established runaway. Recently, a Fermi gamma-ray source (2FGL J2030.7+4417) with a position compatible with that of HD 195592 has been reported. Aims: Our goal is to explore the scenario where HD 195592 is the counterpart of the Fermi...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/3268 |
| Acceso en línea: | http://hdl.handle.net/11336/3268 |
| Access Level: | acceso abierto |
| Palabra clave: | Early-type stars Gamma-rays Radiation mechanisms: non-thermal Stars individual: HD 195592 https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | Context. HD 195592 is an O-type super-giant star, known as a well-established runaway. Recently, a Fermi gamma-ray source (2FGL J2030.7+4417) with a position compatible with that of HD 195592 has been reported. Aims: Our goal is to explore the scenario where HD 195592 is the counterpart of the Fermi gamma-ray source, modeling the non-thermal emission produced in the bowshock of the runaway star. Methods: We calculated the spectral energy distribution of the radiation produced in the bowshock of HD 195592 and we compared it with Fermi observations of the 2FGL J2030.7+4417. Results: We present relativistic particle losses and the resulting radiation of the bowshock of HD 195592 and show that the latter is compatible with the detected gamma-ray emission. Conclusions: We conclude that the Fermi source 2FGL J2030.7+4417 might be produced, under some energetic assumptions, by inverse Compton up-scattering of photons from the heated dust in the bowshock of the runaway star. Therefore, HD 195592 might be the very first object detected belonging to the category of gamma-ray emitting runaway massive stars, whose existence has been recently predicted. |
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