Precessing microblazars and unidentified gamma-ray sources

Details Precessing microblazars and unidentified gamma-ray sources Precessing microblazars and unidentified gamma-ray sources

2002-02-17

arxiv.org/abs/astro-ph/0202316v2

Astron. Astrophys. 385 (2002) L10 - L13

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, Astronomy & Astrophysics Letters in press, typing errors correction

Scientific paper

10.1051/0004-6361:20020251

The recent discovery by Paredes et al. (2000) of a persistent microquasar that is positionally coincident with an unidentified gamma-ray source has open the possibility that other sources in the Third EGRET Catalog could be interpreted as microquasars as well. In this letter we show that some variable unidentified EGRET sources in the galactic plane could be produced by faint, otherwise undetected microquasars with precessing jets. When the jet points towards the observer, gamma-ray emission resulting from upscattered stellar photons could be detectable yielding a variable source with weak or undetectable counterpart at longer wavelengths. Strategies for detecting these``microblazars'' with forthcoming satellites are briefly discussed.

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