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The jet of the quasar 4C+21.35 from parsec to kiloparces scales and its role in high energy photon production

Published online by Cambridge University Press:  24 March 2015

Svetlana G. Jorstad
Affiliation:
IAR, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA Astronomical Institute, St. Petersburg State University, Universitetskij Pr. 28, Petrodvorets, 198504 St. Petersburg, Russia
Alan P. Marscher
Affiliation:
IAR, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA
Daria A. Morozova
Affiliation:
Astronomical Institute, St. Petersburg State University, Universitetskij Pr. 28, Petrodvorets, 198504 St. Petersburg, Russia
Vishal Bala
Affiliation:
IAR, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA
Ivan Agudo
Affiliation:
IAR, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA JIVE, Postbus 2, NL-7990 AA Dwingeloo, The Netherlands Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, 18080, Granada, Spain
José L. Gómez
Affiliation:
Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, 18080, Granada, Spain
Anne Lähteenmäki
Affiliation:
Aalto University Metsähovi Radio Observatory Metsähovintie 114, FIN-02540 Kylmälä, Finland Aalto University Department of Radio Science and Engineering, P.O. BOX 13000, FI-00076 AALTO, Finland
Valeri M. Larionov
Affiliation:
Astronomical Institute, St. Petersburg State University, Universitetskij Pr. 28, Petrodvorets, 198504 St. Petersburg, Russia
Paul S. Smith
Affiliation:
Steward Observatory, University of Arizona, Tucson, AZ 85721-0065, USA
Merja Tornikoski
Affiliation:
Aalto University Metsähovi Radio Observatory Metsähovintie 114, FIN-02540 Kylmälä, Finland
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Abstract

We present an analysis of the parsec-scale jet structure of the quasar 4C+21.35 with a resolution of 0.1 milliarcseconds based on 63 epochs of Very Long Baseline Array observations at 43 GHz from 2007 June to 2014 May along with the Fermi LAT γ-ray light curve and multi-frequency optical photometric and polarimetric data. We find that the innermost jet of the quasar consists of a very compact core of size ~0.03 mas, as well as feature A1 located 0.16 ± 0.03 mas from the core. The distance of A1 remains fairly stable, but its position angle with respect to the core changes from -10 to +10 deg. We detect 4 superluminal knots in the inner jet with apparent speeds ranging from 10c to 20c. The first two components appeared in the jet during the high γ-ray state of the quasar from mid-2010 to early 2011, while the fourth knot appears to be connected with the γ-ray active state in late 2013 - early 2014. The first knot can be associated with the dramatic VHE flare in 2010 June and possesses an extreme Doppler factor ~60. We find that maxima in the γ-ray light curve coincide with epochs of interaction between the moving knots and the core and feature A1. This suggests that the core and A1 are recollimation shocks where γ-ray flares occur. The Chandra 0.5-6 keV image reveals the existence of X-ray emission in the kiloparsec scale jet of the quasar that can be explained via inverse Compton scattering off the cosmic microwave background by relativistic electrons if no deceleration occurs between the parsec- and kiloparsec-scale jets.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2015 

References

Aleksić, J., et al. 2011, ApJL, 730, L8CrossRefGoogle Scholar
Burbidge, G. R., Jones, T. W., & O'Dell, S. L. 1974, ApJ, 193, 43CrossRefGoogle Scholar
Farina, E.P., Decarli, R., Falomo, R., Treves, A., Raiteri, C. M. 2012, MNRAS, 424, 393CrossRefGoogle Scholar
Hartman, R. C., et al. 1999, ApJS, 123, 79CrossRefGoogle Scholar
Jorstad, S. G., et al. 2013, ApJ, 773, 147CrossRefGoogle Scholar
Jorstad, S. G. & Marscher, A. P. 2006, Astronomische Nachrichten, 327, 227CrossRefGoogle Scholar
Jorstad, S. G., et al. 2005, AJ, 130, 1418CrossRefGoogle Scholar
Lister, M. L., et al. 2013, AJ, 146, 120CrossRefGoogle Scholar
Malmrose, M. P., Marscher, A. P., Jorstad, S. G., Nikutta, R. & Elitzur, M. 2011, ApJ, 732, 116CrossRefGoogle Scholar
Marscher, A. P. 2014, ApJ, 780, 87CrossRefGoogle Scholar
Smith, P. S., Schmidt, G. D., & Jannuzi, B. T. 2011, 2011 Fermi Symposium proceedings - eConf C110509, arXiv:1110.6040Google Scholar
Tavecchio, F., et al. 2011, A&A, 534, 86Google Scholar
Williamson, K. E., et al. 2014, ApJ, 789, 135CrossRefGoogle Scholar
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The jet of the quasar 4C+21.35 from parsec to kiloparces scales and its role in high energy photon production
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