2013A&A...550A.112D


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.23CET00:43:27

2013A&A...550A.112D - Astronomy and Astrophysics, volume 550A, 112-112 (2013/2-1)

Is the bowshock of the runaway massive star HD 195592 a Fermi source?

DEL VALLE M.V., ROMERO G.E. and DE BECKER M.

Abstract (from CDS):

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. 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. 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. 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. 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.

Abstract Copyright:

Journal keyword(s): stars: early-type - gamma-rays: general - radiation mechanisms: non-thermal - stars individual: HD 195592

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* AE Aur Or* 05 16 18.1489437436 +34 18 44.347016027 5.48 6.18 5.96     O9.5V 530 1
2 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49   11.59 10.5     ~ 290 0
3 * eta Car Em* 10 45 03.5455050 -59 41 03.951060 6.37 7.034 6.21 4.90 4.41 OBepec 2246 0
4 M 29 OpC 20 23 56 +38 31.4   7.30 6.6     ~ 223 0
5 HD 195592 s*b 20 30 34.9690436039 +44 18 54.858025184 7.75 7.95 7.08 6.29 5.60 O9.7Ia 198 1
6 PSR J2030+4415 Psr 20 30 51.396 +44 15 38.73           ~ 41 0
7 NAME Cyg Complex reg 20 32 +45.0           ~ 530 0
8 V* V1521 Cyg HXB 20 32 25.78 +40 57 27.9           WN4/5-6/7 1793 2
9 BD+43 3654 s*b 20 33 36.0795380204 +43 59 07.362541702   11.24 10.06     O4If 51 0

    Equat.    Gal    SGal    Ecl

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2021.01.23-00:43:27

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