PKS 1622-253: A Weakly Accreting, Powerful Gamma Ray Source

Details PKS 1622-253: A Weakly Accreting, Powerful Gamma Ray Source PKS 1622-253: A Weakly Accreting, Powerful Gamma Ray Source

2005-09-28

arxiv.org/abs/astro-ph/0509832v1

Astrophys.J.633:L93-L96,2005

Astronomy and Astrophysics

Astrophysics

To appear in ApJ Letters

Scientific paper

10.1086/498307

In this Letter, we discuss new deep radio observations of PKS 1622-253 and their implications for the energetics of the central engine that powers this strong high energy gamma-ray source. Combining archival infrared and optical measurements with new millimeter observations, we show that even though the accretion flow in PKS 1622-253 is under-luminous by quasar standards, a powerful super-luminal jet is launched with a higher kinetic luminosity than most EGRET blazars. Only a few percent of the total jet kinetic luminosity is required to power even the most powerful gamma ray flares that are observed. The implication is that a high accretion system is not required to power the strongest high energy gamma ray sources.

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