416 citations · 1.6k across the 44 of their papers we have counts for
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A helical jet model for OJ287
Mauri Valtonen, Pauli Pihajoki
Context. OJ287 is a quasar with a quasi-periodic optical light curve, with the periodicity observed for over 120 years. This has lead to a binary black hole model as a common expla…
Short time-scale periodicity in OJ 287
Pauli Pihajoki, Mauri Valtonen, Stefano Ciprini
We have studied short-term variations of the blazar OJ 287, suspected to host a supermassive black hole binary. In this study, we use a two-season optical R-band dataset from 2004-…
Dark energy and the structure of the Coma cluster of galaxies
A. D. Chernin, G. S. Bisnovatyi-Kogan, P. Teerikorpi +3
{We consider the Coma cluster of galaxies as a gravitationally bound physical system embedded in the perfectly uniform static dark energy background as implied by the CDM cosmol…