SIMBAD references

2009ApJ...696L..17K - Astrophys. J., 696, L17-L21 (2009/May-1)

The relation between AGN gamma-ray emission and parsec-scale radio jets.

KOVALEV Y.Y., ALLER H.D., ALLER M.F., HOMAN D.C., KADLER M., KELLERMANN K.I., KOVALEV Yu.A., LISTER M.L., McCORMICK M.J., PUSHKAREV A.B., ROS E. and ZENSUS J.A.

Abstract (from CDS):

We have compared the radio emission from a sample of parsec-scale active galactic nucleus (AGN) jets as measured by the VLBA at 15 GHz, with their associated γ-ray properties that are reported in the Fermi Large Area Telescope (LAT) three month bright source list. We find in our radio-selected sample that the γ-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 nondetected objects. This suggests that the jets of bright γ-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 γ-ray emission. This result becomes more pronounced for confirmed γ-ray flaring sources. We identify the parsec-scale radio core as a likely location for both the γ-ray and radio flares, which appear within typical timescales of up to a few months of each other.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: jets - radio continuum: galaxies

Simbad objects: 2

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2009ApJ...696L..17K and select 'bookmark this link' or equivalent in the popup menu