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Radio and gamma-ray properties of extragalactic jets from the TANAMI sample

Citation

Boeck, M and Kadler, M and Mueller, C and Tosti, G and Ojha, R and Wilms, J and Bastieri, D and Burnett, T and Carpenter, B and Cavazzuti, E and Dutka, M and Blanchard, JM and Edwards, PG and Hase, H and Horiuchi, S and Jauncey, DL and Krauss, F and Lister, ML and Lovell, JEJ and Lott, B and Murphy, DW and Phillips, C and Ploetz, C and Pursimo, T and Quick, J and Ros, E and Taylor, G and Thompson, DJ and Tingay, SJ and Tzioumis, A and Zensus, JA, Radio and gamma-ray properties of extragalactic jets from the TANAMI sample, Astronomy & Astrophysics, 590 Article A40. ISSN 1432-0746 (2016) [Refereed Article]


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Copyright ESO 2016

DOI: doi:10.1051/0004-6361/201424773

Abstract

The TANAMI program has been observing parsec-scale radio jets of southern (declination south of − 30) γ-ray bright AGN, simultaneously with Fermi/LAT monitoring of their γ-ray emission, via high-resolution radio imaging with Very Long Baseline Interferometry techniques. We present the radio and γ-rayproperties of the TANAMI sources based on one year of contemporaneous TANAMI and Fermi/LAT data. A large fraction (72%) of the TANAMI sample can be associated with bright γ-ray sources for this time range. Association rates differ for different optical classes with all BL Lacs, 76% of quasars, and just 17% of galaxies detected by the LAT. Upper limits were established on the γ-ray flux from TANAMI sources not detected by LAT. This analysis led to the identification of three new Fermi sources whose detection was later confirmed. The γ-ray and radio luminosities are related by LγLr0.890.04. The brightness temperatures of the radio cores increase with the average γ-ray luminosity and the presence of brightness temperatures above the inverse Compton limit implies strong Doppler boosting in those sources. The undetected sources have lower γ/radio luminosity ratios and lower contemporaneous brightness temperatures. Unless the Fermi/LAT-undetected blazars are much γ-ray-fainter than the Fermi/LAT-detected sources, their γ-ray luminosity should not be significantly lower than the upper limits calculated here.

Item Details

Item Type:Refereed Article
Keywords:galaxies: active; galaxies: nuclei; galaxies: jets; gamma rays: galaxies; radio continuum: galaxies
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:High Energy Astrophysics; Cosmic Rays
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Blanchard, JM (Mr Jay Blanchard)
Author:Lovell, JEJ (Dr Jim Lovell)
ID Code:115227
Year Published:2016
Deposited By:Mathematics and Physics
Deposited On:2017-03-10
Last Modified:2017-04-07
Downloads:0

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