Correlations between X-ray and radio spectral properties of accreting black holes
Andrzej A. Zdziarski,
Piotr Lubiński,
Marat Gilfanov,
Mike Revnivtsev,
Corresponding Author
Andrzej A. Zdziarski
N. Copernicus Astronomical Center, Bartycka 18, 00-716 Warsaw, Poland
★ E-mail: [email protected]Search for more papers by this authorPiotr Lubiński
N. Copernicus Astronomical Center, Bartycka 18, 00-716 Warsaw, Poland
Search for more papers by this authorMarat Gilfanov
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching, Germany
Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117810 Moscow, Russia
Search for more papers by this authorMike Revnivtsev
Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117810 Moscow, Russia
Search for more papers by this authorAndrzej A. Zdziarski,
Piotr Lubiński,
Marat Gilfanov,
Mike Revnivtsev,
Corresponding Author
Andrzej A. Zdziarski
N. Copernicus Astronomical Center, Bartycka 18, 00-716 Warsaw, Poland
★ E-mail: [email protected]Search for more papers by this authorPiotr Lubiński
N. Copernicus Astronomical Center, Bartycka 18, 00-716 Warsaw, Poland
Search for more papers by this authorMarat Gilfanov
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching, Germany
Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117810 Moscow, Russia
Search for more papers by this authorMike Revnivtsev
Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117810 Moscow, Russia
Search for more papers by this authorABSTRACT
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.
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