2002
DOI: 10.1051/0004-6361:20020926
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A multi-wavelength investigation of the non-thermal radio emitting O-star 9 Sgr

Abstract: Abstract. We report the results of a multi-wavelength investigation of the O4 V star 9 Sgr (= HD 164794). Our data include observations in the X-ray domain with XMM-Newton, in the radio domain with the VLA as well as optical spectroscopy. 9 Sgr is one of a few presumably single OB stars that display non-thermal radio emission. This phenomenon is attributed to synchrotron emission by relativistic electrons accelerated in strong hydrodynamic shocks in the stellar wind. Given the enormous supply of photospheric U… Show more

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Cited by 50 publications
(74 citation statements)
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“…This is a long period, eccentric massive binary, whose binary nature has been confirmed in both spectroscopy (Rauw et al 2002(Rauw et al , 2012 and interferometry (Sana 2011, priv. comm.…”
Section: Appendix A: the Cataloguementioning
confidence: 83%
“…This is a long period, eccentric massive binary, whose binary nature has been confirmed in both spectroscopy (Rauw et al 2002(Rauw et al , 2012 and interferometry (Sana 2011, priv. comm.…”
Section: Appendix A: the Cataloguementioning
confidence: 83%
“…The XMM-Newton observation discussed by Rauw et al (2002a) was obtained on March 8, 2001, i.e. at orbital phase 0.605.…”
Section: Discussionmentioning
confidence: 99%
“…We therefore included the RGS data in a simultaneous fit of all the X-ray data of HD 108 and the results are presented in Table 2. Unlike the cases of ζ Pup ) and 9 Sgr (Rauw et al 2002a), almost no Table 2) superimposed. Black lines are for EPIC MOS1 data, fit, and residuals; light grey is for EPIC MOS2 and dark grey for EPIC pn.…”
Section: X-ray Data Analysismentioning
confidence: 91%