A Multiwavelength Study of the Runaway Binaries HD14633 and HD15137
Department of Physics, Lehigh University, USA
Department of Astrophysics, Geophysics and Oceanography, Université de Liège, Belgium
Eureka Scientific, Inc., USA
Department of Physics and Astronomy, Georgia State University, USA
Abstract
The runaway O-type binaries HD14633 and HD15137 were likely ejected from the cluster of their birth by supernovae explosions in close binaries. Here we present recent optical spectra to update the orbital solutions of the binaries and study the physical parameters of the O star primaries. We also present XMM-Newton observations of both systems that attempt to detect hard power-law emission from compact companions. EPIC spectra of HD14633 at periastron and apastron reveal a non-thermal X-ray flux component that is variable during the orbit. Our EPIC spectra of HD15137 indicate thermal X-ray emission consistent with an isolated O star. We provide an upper limit on the emission from a compact companion in HD15137.