Microlensing in phase space II: Correlations analysis

Details Microlensing in phase space II: Correlations analysis Microlensing in phase space II: Correlations analysis

2006-04-10

arxiv.org/abs/astro-ph/0604190v2

Mon.Not.Roy.Astron.Soc.370:105-120,2006

Astronomy and Astrophysics

Astrophysics

Accepted for publication in MNRAS. 17 pages, 8 figures. The first part of this little series is available at http://www.arxi

Scientific paper

10.1111/j.1365-2966.2006.10422.x

Applications of the phase space approach to the calculation of the microlensing autocorrelation function are presented. The continuous propagation equation for a random star field with a Gaussian velocity distribution is solved in the leading non-trivial approximation using the perturbation technique. It is shown that microlensing modulations can be important in the interpretation of optical and shorter-wavelength light curves of pulsars, power spectra of active galactic nuclei and coherence estimates for quasi-periodic oscillations of dwarf novae and low-mass X-ray binaries. Extra scatter in the brightness of type Ia supernovae due to gravitational microlensing is shown to be of order up to 0.2 stellar magnitudes depending on the extent of the light curves.

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