Lensing clusters of galaxies in the SDSS-III
Z. L. Wen, J. L. Han, Y. Y. Jiang
TL;DR
This paper reports the discovery of 68 new strong lensing galaxy clusters in SDSS-III data, including detailed classifications and analysis of their properties, such as arc separations and correlation with cluster richness.
Contribution
It introduces a visual inspection method to identify new strong lensing clusters in SDSS-III, expanding the catalog of known lensing systems and analyzing their characteristics.
Findings
68 new strong lensing clusters identified
Lensing likelihood correlates with cluster richness
Arc separations increase with cluster richness
Abstract
We identify new strong lensing clusters of galaxies from the Sloan Digital Sky Survey III (SDSS DR8) by visually inspecting color images of a large sample of clusters of galaxies. We find 68 new clusters showing giant arcs in addition to 30 known lensing systems. Among 68 cases, 13 clusters are "almost certain" lensing systems with tangential giant arcs, 22 clusters are "probable" and 31 clusters are "possible" lensing systems. We also find two exotic systems with blue rings. The giant arcs have angular separations of 2.0"-25.7" from the bright central galaxies. We note that the rich clusters are more likely to be lensing systems, and the separations between arcs and the central galaxies increase with cluster richness.
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