Resolving X-ray sources from B-stars spectroscopically: The example of mu Lep

Abstract

We present high-resolution X-ray observations of the chemically peculiar late-type B-star: mu Lep. However, we find spectroscopic and astrometric evidence, which show that the X-rays are not traced back to the B-star itself, but rather to a previously unresolved companion: mu Lep-B, whose X-ray spectrum resembles that of a coronally active source. We discuss the possibility that mu Lep-B is a pre-main-sequence companion, most likely of the non-accreting magnetically-active type.

arXiv commentTo be published in ApJ

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• The first high-resolution X-ray spectrum of a Herbig Star: The case of AB Aurigae
• Multiplicity of late-type B stars with HgMn peculiarity
• Thomson Scattering and Collisional Ionization in the X-rays Grating Spectra of the Recurrent Nova U Scorpii
• No magnetic field in the spotted HgMn star mu Leporis