2010A&A...517L..10B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.16CEST18:59:33

2010A&A...517L..10B - Astronomy and Astrophysics, volume 517, L10-10 (2010/7-1)

Detection of nonthermal emission from the bow shock of a massive runaway star.

BENAGLIA P., ROMERO G.E., MARTI J., PERI C.S. and ARAUDO A.T.

Abstract (from CDS):

The environs of massive, early-type stars have been inspected in recent years in the search for sites where particles can be accelerated up to relativistic energies. Wind regions of massive binaries that collide have already been established as sources of high-energy emission; however, there is a different scenario for massive stars where strong shocks can also be produced: the bow-shaped region of matter piled up by the action of the stellar strong wind of a runaway star interacting with the interstellar medium. We study the bow-shock region produced by a very massive runaway star, BD+43 3654, to look for nonthermal radio emission as evidence of a relativistic particle population. We observed the field of BD+43 3654 at two frequencies, 1.42 and 4.86GHz, with the Very Large Array (VLA), and obtained a spectral index map of the radio emission. We have detected, for the first time, nonthermal radio emission from the bow shock of a massive runaway star. After analyzing the radiative mechanisms that can be at work, we conclude that the region under study could produce enough relativistic particles whose radiation might be detectable by forthcoming gamma-ray instruments, like CTA North.

Abstract Copyright:

Journal keyword(s): stars: early-type - stars: individual: BD+43 3654 - radio continuum: general - infrared: stars

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2497 2
2 QSO B2005+40 QSO 20 07 44.9443187008 +40 29 48.601470737   18.5 19 20.3   ~ 268 1
3 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 790 0
4 BD+43 3654 s*b 20 33 36.0795380204 +43 59 07.362541702   11.24 10.06     O4If 50 0
5 ICRF J205252.0+363535 Sy2 20 52 52.05498177 +36 35 35.3005039   22.083   21.200   ~ 87 1

    Equat.    Gal    SGal    Ecl

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2020.07.16-18:59:33

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