Open AccessCorrelations between X‐ray and radio spectral properties of accreting black holes
Author(s) -
Zdziarski Andrzej A.,
Lubiński Piotr,
Gilfanov Marat,
Revnivtsev Mike
Publication year - 2003
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2003.06556.x
Subject(s) - physics , astrophysics , spectral index , accretion (finance) , spectral line , black hole (networking) , reflection (computer programming) , spectral density , flux (metallurgy) , astronomy , accretion disc , power law , computer network , routing protocol , statistics , routing (electronic design automation) , mathematics , materials science , computer science , programming language , metallurgy , link state routing protocol
We study correlations between the X‐ray spectral index, the strength of Compton reflection, and X‐ray and radio fluxes in accreting black holes (Seyferts and black hole binaries). We critically evaluate the evidence for the correlation of the X‐ray spectral index with the strength of Compton reflection and consider in detail statistical and systematic effects that can affect it. We study patterns of spectral variability (in particular, pivoting of a power‐law spectrum) corresponding to the X‐ray index‐flux correlation. We also consider implications of the form of observed X‐ray spectra and their variability for interpretation of the correlation between the radio and X‐ray fluxes. Finally, we discuss accretion geometries that can account for the correlations and their overall theoretical interpretations.