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Why the fundamental plane of black hole activity is not simply a distance driven artifact |
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| Authors: | A Merloni E Krding S Heinz S Markoff T DiMatteo H Falcke |
| Institution: | aMax-Planck-Institut für Astrophysik, Karl-Schwarzschild-Strasse 1, D-85741 Garching, Germany bSchool of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK cKavli Institute for Astrophysics and Space Research, MIT, 77 Massachusetts Avenue, Cambridge, MA 02139, USA dAstronomical Institute “Anton Pannekoek”, University of Amsterdam, Kruislaan 403, 1098 SJ, Amsterdam, The Netherlands eCarnegie Mellon University, Department of Physics, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA fMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany gRadio Observatory, ASTRON, Dwingeloo, P.O. Box 2, 7990 AA Dwingeloo, The Netherlands hDepartment of Astronomy, Radboud Universiteit Nijmegen, Postbus 9010, 6500 GL Nijmegen, The Netherlands |
| Abstract: | The fundamental plane of black hole activity is a non-linear correlation among radio core luminosity, X-ray luminosity and mass of all accreting black holes, both of stellar mass and supermassive, found by Merloni et al. Merloni, A., Heinz, S., di Matteo, T. 2003. MNRAS 345, 1057 (MHD03)] and, independently, by Falcke et al. Falcke, H., Körding, E., Markoff, S., 2004. A& A 414, 895]. Here we further examine a number of statistical issues related to this correlation. In particular, we discuss the issue of sample selection and quantify the bias introduced by the effect of distance in two of the correlated quantities. We demonstrate that the fundamental plane relation cannot be a distance artifact, and that its non-linearity must represent an intrinsic characteristic of accreting black holes. We also discuss possible future observational strategies to improve our understanding of this correlation. |
| Keywords: | Black hole physics Galaxy: nuclei X-ray: binaries |
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