On the relation between AGN gamma-ray emission and parsec-scale radio jets

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dc.creatorKovalev, Y. Y.
dc.creatorAller, H. D.
dc.creatorAller, M. F.
dc.creatorHoman, D. C.
dc.creatorKadler, M.
dc.creatorKellermann, K. I.
dc.creatorKovalev, Yu. A.
dc.creatorLister, M. L.
dc.creatorMcCormick, M. J.
dc.creatorPushkarev, A. B.
dc.creatorRos, E.
dc.creatorZensus, J. A.
dc.date2009-02-12
dc.date2009-03-27
dc.date.accessioned2026-07-07T13:01:09Z
dc.date.available2026-07-07T13:01:09Z
dc.descriptionWe have compared the radio emission from a sample of parsec-scale AGN jets as measured by the VLBA at 15 GHz, with their associated gamma-ray properties that are reported in the Fermi LAT 3-month bright source list. We find in our radio-selected sample that the gamma-ray photon flux correlates well with the quasi-simultaneously measured compact radio flux density. The LAT-detected jets in our radio-selected complete sample generally have higher compact radio flux densities, and their parsec-scale cores are brighter (i.e., have higher brightness temperature) than the jets in the LAT non-detected objects. This suggests that the jets of bright gamma-ray AGN have preferentially higher Doppler-boosting factors. In addition, AGN jets tend to be found in a more active radio state within several months from LAT-detection of their strong gamma-ray emission. This result becomes more pronounced for confirmed gamma-ray flaring sources. We identify the parsec-scale radio core as a likely location for both the gamma-ray and radio flares, which appear within typical timescales of up to a few months of each other.
dc.description5 pages, 5 figures, accepted for publication in the Astrophysical Journal Letters; title is changed, minor corrections of the text are made
dc.identifierhttps://arxiv.org/abs/0902.2085
dc.identifierhttp://arxiv.org/abs/0902.2085
dc.identifierThe Astrophysical Journal Letters 696 (2009) L17-L21
dc.identifierdoi:10.1088/0004-637X/696/1/L17
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/226063
dc.subjectAstrophysics of Galaxies
dc.subjectHigh Energy Astrophysical Phenomena
dc.titleOn the relation between AGN gamma-ray emission and parsec-scale radio jets
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