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Gravitational lensing by globular clusters and Arp objects

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arxiv astro-ph/0308338 v1 pith:FCCD7HB3 submitted 2003-08-20 astro-ph

Gravitational lensing by globular clusters and Arp objects

classification astro-ph
keywords galaxieslensingclustersglobularexplainforegroundgravitationalobjects
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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