Gravitational microlensing of gamma-ray blazars

Details Gravitational microlensing of gamma-ray blazars Gravitational microlensing of gamma-ray blazars

2002-05-24

arxiv.org/abs/astro-ph/0205441v1

Mon.Not.Roy.Astron.Soc.339:335-352,2003

Astronomy and Astrophysics

Astrophysics

30 pages, 27 figures. Four figures are being submitted only as .gif files, and should be printed separately. The abstract belo

Scientific paper

10.1046/j.1365-8711.2003.06219.x

We present a detailed study of the effects of gravitational microlensing on compact and distant $\gamma$-ray blazars. These objects have $\gamma$-ray emitting regions which are small enough as to be affected by microlensing effects produced by stars lying in intermediate galaxies. We analyze the temporal evolution of the gamma-ray magnification for sources moving in a caustic pattern field, where the combined effects of thousands of stars are taken into account using a numerical technique. We propose that some of the unidentified $\gamma$-ray sources (particularly some of those lying at high galactic latitude whose gamma-ray statistical properties are very similar to detected $\gamma$-ray blazars) are indeed the result of gravitational lensing magnification of background undetected Active Galactic Nuclei (AGNs).

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