EDP Sciences
Free access
Volume 375, Number 1, August III 2001
Page(s) 145 - 148
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20010826

A&A 375, 145-148 (2001)
DOI: 10.1051/0004-6361:20010826

The X-ray spectrum of LSI+61°303

J. Greiner and A. Rau

Astrophysical Institute Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany

(Received 4 April 2001 / Accepted 6 June 2001)

It had been proposed earlier that the hard X-ray and gamma-ray radiation of the Be/X-ray system LSI +61$\degr$303 could be due to inverse Compton scattering of optical photons from the Be star by the same electron population which also produces the radio emission. Recently, Apparao (2001) has calculated this inverse Compton emission in more detail, and predicted that the X-ray spectrum should show a break at around 20 keV. We investigated archival RXTE data, but do not find such a break in the 2-25 keV range. The implications of this finding are shortly discussed.

Key words: X-ray: stars -- binaries: close -- stars: individual: LSI +61$\degr$303 $\equiv$ V615 Cas

Offprint request: J. Greiner, jgreiner@aip.de

SIMBAD Objects

© ESO 2001