BeppoSAX survey of Be/X-ray binary candidates
J.M. Torrejón1
and
A. Orr2
1
Univ. of Alicante, Department of Physics,
EPS, Ap. 99, E-03080, Alicante, Spain
2
Astrophysics Division, Space Science Department of ESA, ESTEC,
Postbox 299, NL-2200 AG Noordwijk, The Netherlands
We present a BeppoSAX survey of five Be/X-ray binary
candidates. We report on the identification of two of them,
HD 110432 and HD 141926, as low luminosity Be/X-ray binaries. For
HD 110432 we report
on the detection of a pulsation period of
14 ks. Because the
luminosity of these sources is low and their spectra do not require
non-thermal emission models, these systems are good Be+White Dwarf
candidates. If the pulsation period for HD 110432 is confirmed, this
system would be the most firm Be+WD candidate found up to date. The
other three objects HD 65663, HD 249179 and BD+53 2262 did not show
detectable X-ray emission. We argue that, while the properties of
BD+53 2262 are still consistent with a quiescent Be+Neutron Star
scenario, the lack of detection for the other two objects implies
that they are most probably not X-ray binaries.
Accepted by A&A
Preprints from
jmt@disc.ua.es
or on the web at
http://arXiv.org/abs/astro-ph/0108139
|