AE Aurigae: First Detection of Non-thermal X-Ray Emission from a Bow Shock Produced by a Runaway Star

Marco Miceli, Rosaria Bonito, Pereira, Del Valle, Damiani, Romero, Albacete-Colombo, De Castro, Bonito, López-Santiago, Miceli

Risultato della ricerca: Article

22 Citazioni (Scopus)

Abstract

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.
Lingua originaleEnglish
Numero di pagine4
RivistaTHE ASTROPHYSICAL JOURNAL LETTERS
Volume757
Stato di pubblicazionePublished - 2012

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bows
shock
stars
x rays
nebulae
radio wave
radio waves
shock fronts
photons
energy
encounters
detection
dust
augmentation

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cita questo

AE Aurigae: First Detection of Non-thermal X-Ray Emission from a Bow Shock Produced by a Runaway Star. / Miceli, Marco; Bonito, Rosaria; Pereira; Del Valle; Damiani; Romero; Albacete-Colombo; De Castro; Bonito; López-Santiago; Miceli.

In: THE ASTROPHYSICAL JOURNAL LETTERS, Vol. 757, 2012.

Risultato della ricerca: Article

Miceli, M, Bonito, R, Pereira, Del Valle, Damiani, Romero, Albacete-Colombo, De Castro, Bonito, López-Santiago & Miceli 2012, 'AE Aurigae: First Detection of Non-thermal X-Ray Emission from a Bow Shock Produced by a Runaway Star', THE ASTROPHYSICAL JOURNAL LETTERS, vol. 757.
Miceli, Marco ; Bonito, Rosaria ; Pereira ; Del Valle ; Damiani ; Romero ; Albacete-Colombo ; De Castro ; Bonito ; López-Santiago ; Miceli. / AE Aurigae: First Detection of Non-thermal X-Ray Emission from a Bow Shock Produced by a Runaway Star. In: THE ASTROPHYSICAL JOURNAL LETTERS. 2012 ; Vol. 757.
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title = "AE Aurigae: First Detection of Non-thermal X-Ray Emission from a Bow Shock Produced by a Runaway Star",
abstract = "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.",
keywords = "ISM: clouds, X-rays: general, radiation mechanisms: non-thermal, stars: individual: AE Aur, stars: kinematics and dynamics, stars: massive",
author = "Marco Miceli and Rosaria Bonito and Pereira and {Del Valle} and Damiani and Romero and Albacete-Colombo and {De Castro} and Bonito and L{\'o}pez-Santiago and Miceli",
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TY - JOUR

T1 - AE Aurigae: First Detection of Non-thermal X-Ray Emission from a Bow Shock Produced by a Runaway Star

AU - Miceli, Marco

AU - Bonito, Rosaria

AU - Pereira, null

AU - Del Valle, null

AU - Damiani, null

AU - Romero, null

AU - Albacete-Colombo, null

AU - De Castro, null

AU - Bonito, null

AU - López-Santiago, null

AU - Miceli, null

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

KW - ISM: clouds

KW - X-rays: general

KW - radiation mechanisms: non-thermal

KW - stars: individual: AE Aur

KW - stars: kinematics and dynamics

KW - stars: massive

UR - http://hdl.handle.net/10447/65109

M3 - Article

VL - 757

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

SN - 2041-8205

ER -