TY  - JOUR
A1  - Toala, Jesús Alberto
A1  - Oskinova, Lida
A1  - Ignace, R.
T1  - On the Absence of Non-thermal X-Ray Emission around Runaway O Stars
T2  - The astrophysical journal : an international review of spectroscopy and astronomical physics ; Part 2, Letters
N2  - Theoretical models predict that the compressed interstellar medium around runaway O stars can produce highenergy non-thermal diffuse emission, in particular, non-thermal X-ray and gamma-ray emission. So far, detection of nonthermal X-ray emission was claimed for only one runaway star, AE Aur. We present a search for non-thermal diffuse X-ray emission from bow shocks using archived XMM-Newton observations for a clean sample of six welldetermined runaway O stars. We find that none of these objects present diffuse X-ray emission associated with their bow shocks, similarly to previous X-ray studies toward. zeta ph and BD+ 43 degrees 3654. We carefully investigated multi-wavelength observations of AE Aur and could not confirm previous findings of non-thermal X-rays. We conclude that so far there is no clear evidence of non-thermal extended emission in bow shocks around runaway O stars.
KW  - stars: massive
KW  - stars: mass-loss
KW  - stars: winds, outflows
KW  - X-rays: ISM
Y1  - 2017
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/46754
SN  - 2041-8205
SN  - 2041-8213
VL  - 838
SP  - 1
EP  - 32
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -