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The Parsec-scale Structure, Kinematics, and Polarization of Radio-Loud Narrow-Line Seyfert 1 Galaxies

Richards, J. L. and Lister, M. L. and Savolainen, T. and Homan, D. C. and Kadler, M. and Hovatta, T. and Readhead, A. C. S. and Arshakian, T. G. and Chavushyan, V. (2015) The Parsec-scale Structure, Kinematics, and Polarization of Radio-Loud Narrow-Line Seyfert 1 Galaxies. In: Extragalactic jets from every angle. IAU Symposium. No.313. Cambridge University Press , Cambridge, pp. 139-142. ISBN 9781107078741.

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Several narrow-line Seyfert 1 galaxies (NLS1s) have now been detected in gamma rays, providing firm evidence that at least some of this class of active galactic nuclei (AGN) produce relativistic jets. The presence of jets in NLS1s is surprising, as these sources are typified by comparatively small black hole masses and near- or super-Eddington accretion rates. This challenges the current understanding of the conditions necessary for jet production. Comparing the properties of the jets in NLS1s with those in more familiar jetted systems is thus essential to improve jet production models. We present early results from our campaign to monitor the kinematics and polarization of the parsec-scale jets in a sample of 15 NLS1s through multifrequency observations with the Very Long Baseline Array. These observations are complemented by fast-cadence 15 GHz monitoring with the Owens Valley Radio Observatory 40 m telescope and optical spectroscopic monitoring with with the 2 m class telescope at the Guillermo Haro Astrophysics Observatory in Cananea, Mexico.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Lister, M. L.0000-0003-1315-3412
Savolainen, T.0000-0001-6214-1085
Homan, D. C.0000-0002-4431-0890
Hovatta, T.0000-0002-2024-8199
Readhead, A. C. S.0000-0001-9152-961X
Additional Information:© 2015 International Astronomical Union. Published online: 24 March 2015. This work was funded by the National Aeronautics and Space Administration through Fermi Guest Investigator grant NNX13AO79G. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:galaxies: individual (SDSS J095317.09+283601.4, SDSS J143509.49+313147.8, SDSS J095317.09+283601.4), galaxies: active, galaxies: Seyfert, galaxies: jets, radio continuum: galaxies
Series Name:IAU Symposium
Issue or Number:313
Record Number:CaltechAUTHORS:20141203-083401506
Persistent URL:
Official Citation:Richards, J., Lister, M., Savolainen, T., Homan, D., Kadler, M., Hovatta, T., . . . Chavushyan, V. (2014). The parsec-scale structure, kinematics, and polarization of radio-loud narrow-line Seyfert 1 galaxies. Proceedings of the International Astronomical Union, 10(S313), 139-142. doi:10.1017/S1743921315002070
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52305
Deposited By: Ruth Sustaita
Deposited On:03 Dec 2014 18:01
Last Modified:09 Mar 2020 13:19

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