Journal Article

PUBDB-2017-00200

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png X-Ray Observations of Bow Shocks Around Runaway O Stars. The Case of $\zeta$ OPH and BD+43°3654

Toalá, J. A. (Corresponding author) ; Oskinova, L. M. ; González-Galán, A. ; Guerrero, M. A. ; Ignace, R. ; Pohl, M.DESY*

2016
Univ.11032 Chicago, Ill. [u.a.]

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Please use a persistent id in citations: doi:10.3847/0004-637X/821/2/79  doi:10.3204/PUBDB-2017-00200

Abstract: Non-thermal radiation has been predicted within bow shocks around runaway stars by recent theoretical works. We present X-ray observations toward the runaway stars ζ Oph by Chandra and Suzaku and of BD+43°3654 by XMM-Newton to search for the presence of non-thermal X-ray emission. We found no evidence of non-thermal emission spatially coincident with the bow shocks; nonetheless, diffuse emission was detected in the vicinity of ζ Oph. After a careful analysis of its spectral characteristics, we conclude that this emission has a thermal nature with a plasma temperature of T ≈ 2 × 10$^6$ K. The cometary shape of this emission seems to be in line with recent predictions of radiation-hydrodynamic models of runaway stars. The case of BD+43°3654 is puzzling, as non-thermal emission has been reported in a previous work for this source.

Note: (c) The American Astronomical Society

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Contributing Institute(s):

1. Theoretische Astroteilchenphysik (Z_THAT)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF3-613) (POF3-613)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2016

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Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Free to read ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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