Gravitational lensing by globular clusters and Arp objects

Details Gravitational lensing by globular clusters and Arp objects Gravitational lensing by globular clusters and Arp objects

2003-08-20

arxiv.org/abs/astro-ph/0308338v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, accepted by ASP Conf. Ser., IAU Symp. 214

Scientific paper

We try to explain quasar-galaxy associations by gravitational lensing by globular clusters, located in the halos of foreground galaxies. We propose observational test for verification of this hypothesis. We processed SUPERCOSMOS sky survey and found overdensities of star-like sources with zero proper motions in the vicinities of foreground galaxies from CfA3 catalog. We show mean effect for galaxies with different redshifts. Two effects can explain observational data - these are lensing by globular clusters and lensing by dwarf galaxies. We made CCD 3-color photometry with 2.0-1.2 meter telescopes to select extremely lensed objects around several galaxies for spectroscopic observations.

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