Connection Between Superluminal Ejections and gamma-Ray Flares in Blazars

Details Connection Between Superluminal Ejections and gamma-Ray Flares in Blazars Connection Between Superluminal Ejections and gamma-Ray Flares in Blazars

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aprs.conf..305m&link_type=abstract

Astrophysical Phenomena Revealed by Space VLBI, Proceedings of the VSOP Symposium, held at the Institute of Space and astronauti

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

We examine the coincidence of times of high gamma-ray flux and epochs of zero separation of superluminal components from the core in EGRET blazars based on our 1993.9--1997.6 VLBA monitoring program at 22 and 43 GHz. In 19 cases of gamma-ray flares for which sufficient VLBA data exist, 10 of the flares fall within 1-sigma uncertainty of the extrapolated epoch of zero separation from the core of a superluminal radio component. The number expected by random chance is < 4 at 95% confidence. Although there are a small number of cases in which the gamma-ray flux was low at the extrapolated epoch of ejection, these can be explained by accelerations or decelerations in the proper motions, as expected, for example, in bent jets.

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