Boeck et al.pdf (855.92 kB)
Radio and gamma-ray properties of extragalactic jets from the TANAMI sample
journal contribution
posted on 2023-05-19, 03:01 authored by Boeck, M, Kadler, M, Mueller, C, Tosti, G, Ojha, R, Wilms, J, Bastieri, D, Burnett, T, Carpenter, B, Cavazzuti, E, Dutka, M, Blanchard, JM, Edwards, PG, Hase, H, Horiuchi, S, Jauncey, DL, Krauss, F, Lister, ML, James LovellJames Lovell, Lott, B, Murphy, DW, Phillips, C, Ploetz, C, Pursimo, T, Quick, J, Ros, E, Taylor, G, Thompson, DJ, Tingay, SJ, Tzioumis, A, Zensus, JAThe 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 Lγ ∝ Lr0.89±0.04 A. 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.
History
Publication title
Astronomy & AstrophysicsVolume
590Article number
A40Number
A40Pagination
1-12ISSN
1432-0746Department/School
School of Natural SciencesPublisher
E D P SciencesPlace of publication
FranceRights statement
Copyright ESO 2016Repository Status
- Open