US/Mountain, 28 May - 2 June 2017
Evidence of Two-Component Optical Polarization in Blazar 1ES 1959+650
1 Instituto de Astronomía, Universidad Nacional Autónoma de México, AP 70-264 04510, DF Mexico
2 Instituto de Astronomóa, Universidad Nacional Autónoma de México, AP 877 22800 Ensenada BC Mexico
Published online: 9 December 2013
In this work we present an analysis of the optical polarimetric variability of the TeV-blazar 1 ES 1959+650 from 2007 October 18 to 2011 May 5. The source showed a maximum variation of 1.2 mag in R- band, and a maximum polarization degree of 12.2%. The blazar presented a preferential position angle of the optical polarization of ~ 153°, with variations of 10° − 50°, which is in agreement with the projected position angle of the parsec-scale jet found at 43 GHz. We infer the existence of the two optically thin synchrotron components that contribute to the polarized flux, consistent with the spine-sheath model. One of them is stable with a constant polarization degree of 4%. Assuming a stationary shock, we estimated some parameters associated with the physics of the relativistic jet: the Doppler factor of δD ∼ 23, the viewing angle of the jet of Φ ~ 2°.4, and the size of the emission region of rb ~ 5.6 × 1017 cm.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.