Gamma-Ray and Parsec-Scale Jet Properties of a Complete Sample of Blazars From the MOJAVE Program
Abstract
We investigate the Fermi LAT gamma-ray and 15 GHz VLBA radio properties of a joint gamma-ray- and radio-selected sample of AGNs obtained during the first 11 months of the Fermi mission (2008 Aug 4 - 2009 Jul 5). Our sample contains the brightest 173 AGNs in these bands above declination -30 deg. during this period, and thus probes the full range of gamma-ray loudness (gamma-ray to radio band luminosity ratio) in the bright blazar population. The latter quantity spans at least four orders of magnitude, reflecting a wide range of spectral energy distribution (SED) parameters in the bright blazar population. The BL Lac objects, however, display a linear correlation of increasing gamma-ray loudness with synchrotron SED peak frequency, suggesting a universal SED shape for objects of this class. The synchrotron self-Compton model is favored for the gamma-ray emission in these BL Lacs over external seed photon models, since the latter predict a dependence of Compton dominance on Doppler factor that would destroy any observed synchrotron SED peak - gamma-ray loudness correlation. The high-synchrotron peaked (HSP) BL Lac objects are distinguished by lower than average radio core brightness temperatures, and none display large radio modulation indices or high linear core polarization levels. No equivalent trends are seen for the flat-spectrum radio quasars (FSRQ) in our sample. Given the association of such properties with relativistic beaming, we suggest that the HSP BL Lacs have generally lower Doppler factors than the lower-synchrotron peaked BL Lacs or FSRQs in our sample.
Keywords
Cite
@article{arxiv.1107.4977,
title = {Gamma-Ray and Parsec-Scale Jet Properties of a Complete Sample of Blazars From the MOJAVE Program},
author = {M. L. Lister and M. Aller and H. Aller and T. Hovatta and K. I. Kellermann and Y. Y. Kovalev and E. T. Meyer and A. B. Pushkarev and E. Ros and M. Ackermann and E. Antolini and L. Baldini and J. Ballet and G. Barbiellini and D. Bastieri and K. Bechtol and R. Bellazzini and B. Berenji and R. D. Blandford and E. D. Bloom and M. Boeck and E. Bonamente and A. W. Borgland and J. Bregeon and M. Brigida and P. Bruel and R. Buehler and S. Buson and G. A. Caliandro and R. A. Cameron and P. A. Caraveo and J. M. Casandjian and E. Cavazzuti and C. Cecchi and C. S. Chang and E. Charles and A. Chekhtman and C. C. Cheung and J. Chiang and S. Ciprini and R. Claus and J. Cohen-Tanugi and J. Conrad and S. Cutini and F. de Palma and C. D. Dermer and E. do Couto e Silva and P. S. Drell and A. Drlica-Wagner and C. Favuzzi and S. J. Fegan and E. C. Ferrara and J. Finke and W. B. Focke and P. Fortin and Y. Fukazawa and P. Fusco and F. Gargano and D. Gasparrini and N. Gehrels and S. Germani and N. Giglietto and F. Giordano and M. Giroletti and T. Glanzman and G. Godfrey and I. A. Grenier and S. Guiriec and D. Hadasch and M. Hayashida and E. Hays and D. Horan and R. E. Hughes and G. Jóhannesson and A. S. Johnson and M. Kadler and H. Katagiri and J. Kataoka and J. Knödlseder and M. Kuss and J. Lande and F. Longo and F. Loparco and B. Lott and M. N. Lovellette and P. Lubrano and G. M. Madejski and M. N. Mazziotta and W. McConville and J. E. McEnery and J. Mehault and P. F. Michelson and T. Mizuno and C. Monte and M. E. Monzani and A. Morselli and I. V. Moskalenko and S. Murgia and M. Naumann-Godo and S. Nishino and P. L. Nolan and J. P. Norris and E. Nuss and M. Ohno and T. Ohsugi and A. Okumura and N. Omodei and E. Orlando and M. Ozaki and D. Paneque and D. Parent and M. Pesce-Rollins and M. Pierbattista and F. Piron and G. Pivato and S. Rainò and A. Readhead and A. Reimer and O. Reimer and J. L. Richards and S. Ritz and H. F. -W. Sadrozinski and C. Sgrò and M. S. Shaw and E. J. Siskind and G. Spandre and P. Spinelli and H. Takahashi and T. Tanaka and J. G. Thayer and J. B. Thayer and D. J. Thompson and G. Tosti and A. Tramacere and E. Troja and T. L. Usher and J. Vandenbroucke and V. Vasileiou and G. Vianello and V. Vitale and A. P. Waite and P. Wang and B. L. Winer and K. S. Wood and S. Zimmer},
journal= {arXiv preprint arXiv:1107.4977},
year = {2019}
}
Comments
22 pages, 11 figures, 4 tables; accepted for publication in the Astrophysical Journal