Is the bowshock of the runaway massive star HD 195592 a Fermi source?
| Autor: | M. V. del Valle, Gustavo E. Romero, M. De Becker |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Ciencias Astronómicas
Photon Radiation mechanisms: non-thermal Ciencias Físicas Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Context (language use) Astrophysics Radiation Stars: early-type Relativistic particle purl.org/becyt/ford/1 [https] Early-type stars early-type [Stars] Astrophysics::Solar and Stellar Astrophysics Stars individual: HD 195592 Astrophysics::Galaxy Astrophysics High Energy Astrophysical Phenomena (astro-ph.HE) Physics general [Gamma-rays] non-thermal [Radiation mechanisms] Gamma ray Astronomy and Astrophysics purl.org/becyt/ford/1.3 [https] HD 195592 [Stars individual] Astronomía Stars Space and Planetary Science Spectral energy distribution Astrophysics::Earth and Planetary Astrophysics Gamma-rays Astrophysics - High Energy Astrophysical Phenomena CIENCIAS NATURALES Y EXACTAS Gamma-rays: general Fermi Gamma-ray Space Telescope |
| Zdroj: | SEDICI (UNLP) Universidad Nacional de La Plata instacron:UNLP CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| Popis: | Context. HD 195592 is an O-type super-giant star, known as a well-established runaway. Recently, a Fermi γ-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 γ-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 γ-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 γ-ray emitting runaway massive stars, whose existence has been recently predicted. Instituto Argentino de Radioastronomía Facultad de Ciencias Astronómicas y Geofísicas |
| Databáze: | OpenAIRE |
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