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OJ 287 binary black hole system
Mauri Valtonen, Stefano Ciprini
The light curve of the quasar OJ 287 extends from 1891 up today without major gaps. Here we summarize the results of the 2005 - 2010 observing campaign. The main results are the fo…
The 2005 - 2010 multiwavelength campaign of OJ287
Mauri Valtonen, Aimo Sillanpää
The light curve of quasar OJ287 extends from 1891 up today without major gaps. This is partly due to extensive studies of historical plate archives by Rene Hudec and associates, an…
Optical polarization angle and VLBI jet direction in the binary black hole model of OJ287
Mauri J. Valtonen, Carolin Villforth, Kaj Wiik
We study the variation of the optical polarization angle in the blazar OJ287 and compare it with the precessing binary black hole model with a 'live' accretion disk. First, a model…
Virial estimator for dark energy
A. D. Chernin, P. Teerikorpi, M. J. Valtonen +3
A new estimator of the local density of dark energy is suggested which comes from the virial theorem for non-relativistic gravitating systems embedded in the uniform dark energy ba…