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2011MNRAS.410.2329D - Mon. Not. R. Astron. Soc., 410, 2329-2338 (2011/February-1)
High time resolution optical/X-ray cross-correlations for X-ray binaries: anticorrelations and rapid variability.
DURANT M., SHAHBAZ T., GANDHI P., CORNELISSE R., MUNOZ-DARIAS T., CASARES J., DHILLON V., MARSH T., SPRUIT H., O'BRIEN K., STEEGHS D. and HYNES R.
Abstract (from CDS):
We find, that the surprising form of X-ray/optical cross-correlation functions, a positive correlation signal preceded by an anticorrelation signal, is seen in all the sources at least some of the time. Such behaviour suggests a mechanism other than reprocessing as being the dominant driver of the short-term variability in the optical emission. This behaviour appears more pronounced when the X-ray spectrum is hard. Furthermore, we find that the cross-correlation relationships themselves are not stable in time, but vary significantly in strength and form. This all hints at dynamic interactions between the emitting components which could be modelled through non-linear or differential relationships.
Abstract Copyright: 2010 The Authors. Journal compilation2010 RAS
Journal keyword(s): stars: neutron - X-rays: binaries - Stars: black holes
Simbad objects: 6
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