Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-22T20:54:03.010Z Has data issue: false hasContentIssue false
  • English
  • Français

Intermittent activity of radio sources. Accretion instabilities and jet precession.

Published online by Cambridge University Press:  24 February 2011

M. Kunert-Bajraszewska ,
A. Janiuk ,
A. Siemiginowska  and
M. Gawroński
M. Kunert-Bajraszewska
Affiliation:
Toruń Centre for Astronomy, N. Copernicus University, Gagarina 11, 87-100 Toruń, Poland email: [email protected]
A. Janiuk
Affiliation:
Center for Theoretical Physics, PAN, Al.Lotnikow 32/46, 02-668 Warsaw, Poland
A. Siemiginowska
Affiliation:
Harvard Smithsonian Center for Astrophysics, 60 Garden St, Cambridge, MA 02138
M. Gawroński
Affiliation:
Toruń Centre for Astronomy, N. Copernicus University, Gagarina 11, 87-100 Toruń, Poland email: [email protected]
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.

We consider the radiation pressure instability operating on short timescales (103 - 106 years) in the accretion disk around a supermassive black hole as the origin of the intermittent activity of radio sources. We test whether this instability can be responsible for short ages (<104 years) of Compact Steep Spectrum sources measured by hot spots propagation velocities in VLBI observations and statistical overabundance of Gigahertz Peaked Spectrum sources. The implied timescales are consistent with the observed ages of the sources. We aslo discuss possible implications of the intermittent activity on the complex morphology of radio sources, such as the quasar 1045+352, dominated by a knotty jet showing several bends. It is possible that we are whitnessing an ongoing jet precession in this source due to internal instabilities within the jet flow.

Keywords

physical data and processes: accretiongalaxies: evolutionquasars: individual (1045+352)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S275: Jets at all Scales , September 2010 , pp. 180 - 181
Copyright
Copyright © International Astronomical Union 2011

References

Czerny, B., Siemiginowska, A., Janiuk, A., Nikiel-Wroczyński, B. & Stawarz, Ł., 2009, ApJ, 698, 840CrossRefGoogle Scholar
Gugliucci, N. E., Taylor, G. B., Peck, A. B., & Giroletti, M., 2005, ApJ, 622, 136CrossRefGoogle Scholar
Janiuk, A., Czerny, B., & Siemiginowska, A., 2002, ApJ, 576, 908Google Scholar
Janiuk, A., Proga, D., & Kurosawa, R., 2008, ApJ, 681, 58Google Scholar
Kunert-Bajraszewska, M., Marecki, A., & Thomasson, P., 2006, A&A, 450, 945Google Scholar
Kunert-Bajraszewska, M., Janiuk, A., Gawroński, M. P., & Siemiginowska, A., 2010, ApJ, 718, 1345CrossRefGoogle Scholar
O'Dea, C. P., 1998, PASP, 110, 493CrossRefGoogle Scholar