Bibcode
Durant, M.; Cornelisse, R.; Remillard, Ron; Levine, Alan
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 401, Issue 1, pp. 355-361.
Fecha de publicación:
1
2010
Número de citas
10
Número de citas referidas
9
Descripción
Regular observations by the All-Sky Monitor aboard the Rossi X-ray
Timing Explorer satellite have yielded well-sampled light curves with a
time baseline of over 10 years. We find that up to eight of the 16
brightest persistent low-mass X-ray binaries (LMXBs) show significant,
possible sinusoidal, variations with periods of the order of 10 years.
We speculate on its possible origin and prevalence in the population of
LMXBs, and we find the presence of a third object in the system, or
long-period variability intrinsic to the donor star, as being attractive
origins for the X-ray flux modulation we detect. For some of the objects
in which we do not detect a signal, there is substantial short-term
variation which may hide modest modulation on long time-scales. Decade
time-scale modulations may thus be even more common.
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