The Astrophysical Journal, 612:L65L68, 2004 September 1
2004. The American Astronomical Society. All rights reserved. Printed in U.S.A.
RESOLVING X-RAY SOURCES FROM B STARS SPECTROSCOPICALLY: THE EXAMPLE OF m LEPORIS
and Steven M. Kahn6
Received 2004 June 15; accepted 2004 July 16; published 2004 August 3
We present high-resolution X-ray observations of the chemically peculiar late-type B star m Lep. However, we
find spectroscopic and astrometric evidence, which shows that the X-rays are not traced back to the B star itself
but rather to a previously unresolved companion, m Lep-B, whose X-ray spectrum resembles that of a coronally
active source. We discuss the possibility that m Lep-B is a premain-sequence companion, most likely of the
nonaccreting magnetically active type.
Subject headings: stars: activity -- stars: chemically peculiar -- stars: coronae -- stars: premain-sequence --