On the Absence of Non-thermal X-Ray Emission around Runaway O Stars
- 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.
Author details: | Jesús Alberto ToalaORCiD, Lida OskinovaORCiDGND, R. Ignace |
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DOI: | https://doi.org/10.3847/2041-8213/aa667c |
ISSN: | 2041-8205 |
ISSN: | 2041-8213 |
Title of parent work (English): | The astrophysical journal : an international review of spectroscopy and astronomical physics ; Part 2, Letters |
Publisher: | IOP Publ. Ltd. |
Place of publishing: | Bristol |
Publication type: | Article |
Language: | English |
Year of first publication: | 2017 |
Publication year: | 2017 |
Release date: | 2020/04/20 |
Tag: | X-rays: ISM; stars: mass-loss; stars: massive; stars: winds, outflows |
Volume: | 838 |
Number of pages: | 5 |
First page: | 1 |
Last Page: | 32 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
Peer review: | Referiert |