Hostname: page-component-8448b6f56d-jr42d Total loading time: 0 Render date: 2024-04-19T15:29:26.537Z Has data issue: false hasContentIssue false
  • English
  • Français

Jet-disk connection in OJ287

Published online by Cambridge University Press:  24 February 2011

Mauri J. Valtonen ,
Tuomas Savolainen  and
Kaj Wiik
Mauri J. Valtonen
Affiliation:
Helsinki Institute of Physics, FIN-00014 University of Helsinki, Finland email: mvaltonen2001@yahoo.com Dept. of Physics & Astronomy, Tuorla Observatory, University of Turku, 21500 Piikkiö, Finland email: kaj.wiik@utu.fi
Tuomas Savolainen
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany email: tsavolainen@mpifr-bonn.mpg.de
Kaj Wiik
Affiliation:
Dept. of Physics & Astronomy, Tuorla Observatory, University of Turku, 21500 Piikkiö, Finland email: kaj.wiik@utu.fi
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

A model for OJ 287 consisting of two orbiting black holes has been constructed using optical light curve data. The model has successfully predicted the occurrence of sharp optical outbursts of OJ 287 for the past 15 years. Here we test if also the variations in the radio jet position angle can be explained within the framework of this same model, which has most of its parameters fixed by the timing of the optical flares. The model applied here has only three free parameters left, the (trivial) zero point of the jet position angle, the time lag between changes in the disk and jet orientations, and the zero point of the viewing angle. Despite its simplicity and the small number of free parameters, the model appears to be able to reproduce the main properties of the observed position angle variations during the past 30 years. The best fits are obtained when the time lag is either ~4 or ~14 years. However, the jet orientation seems to be unrelated to the direction of the spin of the primary black hole. This implies, assuming that the basic model is correct, that the mean orientation of the jet is determined by the orientation of the inner accretion disk, not by the spin axis of the black hole.

Keywords

quasarsjetsbinary black holes
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S275: Jets at all Scales , September 2010 , pp. 275 - 279
Copyright
Copyright © International Astronomical Union 2011

References

Agudo, I., et al. 2010, in “Fermi meets Jansky - AGN in radio and gamma-rays”, Savolainen, T., Ros, E., Porcas, R. W., & Zensus, J. A., eds., 143Google Scholar
Blandford, & Königl, 1979, ApJ, 232, 34CrossRefGoogle Scholar
D'arcangelo, F. D., et al. 2009, ApJ, 697, 985CrossRefGoogle Scholar
Fey, A. L., Clegg, A. W., & Fomalont, E. B. 1996, ApJS, 105, 299CrossRefGoogle Scholar
Fey, A. L. & Charlot, P. 1997, ApJS 111, 95CrossRefGoogle Scholar
Gabuzda, D. C., Wardle, J. F. C., & Roberts, D. H. 1989, ApJL, 336, L59Google Scholar
Gabuzda, D. C. & Cawthorne, T. V. 1996, MNRAS, 283, 759Google Scholar
Gabuzda, D. C. & Gomez, J. L. 2001, MNRAS, 320, 49CrossRefGoogle Scholar
Jorstad, S. G., et al. 2001, ApJS, 134, 181CrossRefGoogle Scholar
Jorstad, S. G., et al. 2005, AJ, 130, 1418CrossRefGoogle Scholar
Lehto, H. J., & Valtonen, M. J. 1996, ApJ, 460, 207Google Scholar
Lister, M. L., et al. 2009a, AJ, 137, 3718CrossRefGoogle Scholar
Lister, M. L., et al. 2009b, AJ, 138, 1874CrossRefGoogle Scholar
Ojha, R. et al. 2004, ApJS, 150, 187CrossRefGoogle Scholar
Piner, G., et al. 2007, AJ, 133, 2357CrossRefGoogle Scholar
Rantakyrö, F., et al. 1998, A&AS, 131, 451Google Scholar
Roberts, D. H., Gabuzda, D. C., & Wardle, J. F. C. 1987, ApJ, 323, 536CrossRefGoogle Scholar
Savolainen, T., et al. 2010, A&A, 512, A24Google Scholar
Sillanpää, A., et al. 1988, ApJ, 325, 628Google Scholar
Sundelius, B., et al. 1996, ASP Conf.Ser. 110, 99Google Scholar
Sundelius, B., et al. 1997, ApJ, 484, 180Google Scholar
Tateyama, C. E., et al. 1996, PASJ, 48, 37CrossRefGoogle Scholar
Tateyama, C. E. & Kingham, K. A. 2004, ApJ, 608, 149CrossRefGoogle Scholar
Tateyama, C. E., et al. 1999, ApJ, 520, 627CrossRefGoogle Scholar
Valtonen, M. J. & Lehto, H. J. 1997, ApJL, 481, L5CrossRefGoogle Scholar
Valtonen, M. J., et al. 2006, ApJ, 646, 36CrossRefGoogle Scholar
Valtonen, M. J., et al. 2008, Nature, 452, 851CrossRefGoogle Scholar
Valtonen, M. J., et al. 2010, ApJ, 709, 725Google Scholar
Valtonen, M. J., et al. 2011, ApJ, in pressGoogle Scholar
Vicente, L., Charlot, P., & Sol, H. 1996, A&A, 312, 727Google Scholar