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

Abstract

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.

To appear in ApJ Letters

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Cited by in corpus (4)

• The co-evolution of the obscured quasar PKS1549-79 and its host galaxy: evidence for a high accretion rate and warm outflow
• Annual Cycles in the Interstellar Scintillation Timescales of PKS B1519-273 and PKS B1622-253
• 3C 216: A Powerful FRII Seyfert 1 Galaxy
• The FRII Broad Line Seyfert 1 Galaxy: PKSJ 1037-2705