Comptonization Signatures in the Rapid Aperiodic Variability of Galactic Black Hole Candidates | Zendy

M. Bottcher | Zendy; Edison Liang | Zendy

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Comptonization Signatures in the Rapid Aperiodic Variability of Galactic Black Hole Candidates

Author(s) -

M. Bottcher,

Edison Liang

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/306226

Subject(s) - physics , aperiodic graph , astrophysics , photon , compton scattering , black hole (networking) , accretion (finance) , radiation , astronomy , optics , computer network , routing protocol , routing (electronic design automation) , mathematics , combinatorics , computer science , link state routing protocol

We investigate the effect of inverse-Compton scattering of flares of softradiation in different geometries of a hot, Comptonizing region and a colderaccretion disk around a solar-mass black hole. The photon-energy dependentlight curves, their Fourier transforms, power spectra and Fourier-perioddependent time lags of hard photons with respect to softer photons arediscussed. On the basis of a comparison with existing data we find argumentsagainst Comptonization of external soft radiation as well as Comptonization ina homogeneous medium as dominant mechanisms for the rapid aperiodic variabilityin Galactic black-hole candidates. Possible further observational tests for theinfluence of Comptonization on the rapid aperiodic variability of Galacticblack-hole candidates are suggested.Comment: 32 pages, including 10 figures and 2 tables; uses epsf.sty, rotate.sty; submitted to Ap

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