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 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-r...

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Detalles Bibliográficos
Autores principales: Valle, María Victoria del, Romero, Gustavo Esteban, De Becker, M.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Astronómicas
Gamma-rays: general
Radiation mechanisms: non-thermal
Stars individual: HD 195592
Stars: early-type
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85646
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85646
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Gamma-rays: general
Radiation mechanisms: non-thermal
Stars individual: HD 195592
Stars: early-type
spellingShingle Ciencias Astronómicas
Gamma-rays: general
Radiation mechanisms: non-thermal
Stars individual: HD 195592
Stars: early-type
Valle, María Victoria del
Romero, Gustavo Esteban
De Becker, M.
Is the bowshock of the runaway massive star HD 195592 a Fermi source?
topic_facet Ciencias Astronómicas
Gamma-rays: general
Radiation mechanisms: non-thermal
Stars individual: HD 195592
Stars: early-type
description 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.
format Articulo
Articulo
author Valle, María Victoria del
Romero, Gustavo Esteban
De Becker, M.
author_facet Valle, María Victoria del
Romero, Gustavo Esteban
De Becker, M.
author_sort Valle, María Victoria del
title Is the bowshock of the runaway massive star HD 195592 a Fermi source?
title_short Is the bowshock of the runaway massive star HD 195592 a Fermi source?
title_full Is the bowshock of the runaway massive star HD 195592 a Fermi source?
title_fullStr Is the bowshock of the runaway massive star HD 195592 a Fermi source?
title_full_unstemmed Is the bowshock of the runaway massive star HD 195592 a Fermi source?
title_sort is the bowshock of the runaway massive star hd 195592 a fermi source?
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/85646
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AT romerogustavoesteban isthebowshockoftherunawaymassivestarhd195592afermisource
AT debeckerm isthebowshockoftherunawaymassivestarhd195592afermisource
bdutipo_str Repositorios
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