2013A&A...555L...9R

Oe stars possibly form an extension to higher temperatures of the Be phenomenon, but it is still unclear whether these stars have disks. X-ray spectra could provide hints for interactions of the star with a putative surrounding disk.We obtained XMM-Newton observations of two Oe stars, HD45314 and HD60848. Spectra and light curves were extracted and analysed. Optical spectra were also obtained to support the X-ray observations.We find that both stars display very different X-ray properties. Whilst HD60848 has an X-ray spectrum and emission level typical for its spectral type, HD45314 displays a very hard X-ray emission, dominated by a thermal plasma with kT ∼21keV. Furthermore, HD45314 displays count rate variations by a factor 2 on timescales of ∼10³s and a high log(L_X)/(L_bol)=-6.10±0.03. The X-ray properties of HD45314 indicate that this star is a new member of the class of γ Cas analogs, the first one among the original category of Oe stars.