Is there a compact companion orbiting the late O-type binary star HD 164816?

L. Trepl, V. V. Hambaryan, T. Pribulla +7

We present a multi-wavelength (X-ray, $\gamma$-ray, optical and radio) study of HD 194816, a late O-type X-ray detected spectroscopic binary. X-ray spectra are analyzed and the X-ray ph…