AE Aurigae: First detection of non-thermal X-ray emission from a bow shock produced by a runaway star

Runaway stars produce shocks when passing through interstellar medium at supersonic velocities. Bow shocks have been detected in the mid-infrared for several high-mass runaway stars and in radio waves for one star. Theoretical models predict the production of high-energy photons by non-thermal radia...

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Autores principales: López Santiago, J., Miceli, M., Valle, María Victoria del, Romero, Gustavo Esteban, Bonito, R., Albacete Colombo, Juan Facundo, Pereira, V., De Castro, E., Damiani, F.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ciencias Astronómicas
ISM: clouds
radiation mechanisms: non-thermal
stars: individual (AE Aur)
stars: kinematics and dynamics
stars: massive
X-rays: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84650
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84650
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
ISM: clouds
radiation mechanisms: non-thermal
stars: individual (AE Aur)
stars: kinematics and dynamics
stars: massive
X-rays: general
spellingShingle Ciencias Astronómicas
ISM: clouds
radiation mechanisms: non-thermal
stars: individual (AE Aur)
stars: kinematics and dynamics
stars: massive
X-rays: general
López Santiago, J.
Miceli, M.
Valle, María Victoria del
Romero, Gustavo Esteban
Bonito, R.
Albacete Colombo, Juan Facundo
Pereira, V.
De Castro, E.
Damiani, F.
AE Aurigae: First detection of non-thermal X-ray emission from a bow shock produced by a runaway star
topic_facet Ciencias Astronómicas
ISM: clouds
radiation mechanisms: non-thermal
stars: individual (AE Aur)
stars: kinematics and dynamics
stars: massive
X-rays: general
description Runaway stars produce shocks when passing through interstellar medium at supersonic velocities. Bow shocks have been detected in the mid-infrared for several high-mass runaway stars and in radio waves for one star. Theoretical models predict the production of high-energy photons by non-thermal radiative processes in a number sufficiently large to be detected in X-rays. To date, no stellar bow shock has been detected at such energies. We present the first detection of X-ray emission from a bow shock produced by a runaway star. The star is AE Aur, which was likely expelled from its birthplace due to the encounter of two massive binary systems and now is passing through the dense nebula IC 405. The X-ray emission from the bow shock is detected at 30″ northeast of the star, coinciding with an enhancement in the density of the nebula. From the analysis of the observed X-ray spectrum of the source and our theoretical emission model, we confirm that the X-ray emission is produced mainly by inverse Compton upscattering of infrared photons from dust in the shock front.
format Articulo
Articulo
author López Santiago, J.
Miceli, M.
Valle, María Victoria del
Romero, Gustavo Esteban
Bonito, R.
Albacete Colombo, Juan Facundo
Pereira, V.
De Castro, E.
Damiani, F.
author_facet López Santiago, J.
Miceli, M.
Valle, María Victoria del
Romero, Gustavo Esteban
Bonito, R.
Albacete Colombo, Juan Facundo
Pereira, V.
De Castro, E.
Damiani, F.
author_sort López Santiago, J.
title AE Aurigae: First detection of non-thermal X-ray emission from a bow shock produced by a runaway star
title_short AE Aurigae: First detection of non-thermal X-ray emission from a bow shock produced by a runaway star
title_full AE Aurigae: First detection of non-thermal X-ray emission from a bow shock produced by a runaway star
title_fullStr AE Aurigae: First detection of non-thermal X-ray emission from a bow shock produced by a runaway star
title_full_unstemmed AE Aurigae: First detection of non-thermal X-ray emission from a bow shock produced by a runaway star
title_sort ae aurigae: first detection of non-thermal x-ray emission from a bow shock produced by a runaway star
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/84650
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