Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21944007s&link_type=abstract
American Astronomical Society, AAS Meeting #219, #440.07
Astronomy and Astrophysics
Astronomy
Scientific paper
Third-order galaxy-galaxy lensing (G3L) or galaxy-galaxy-galaxy lensing is the next generation galaxy-galaxy lensing (GGL) in the field of weak gravitational lensing. In contrast to the traditional GGL -- successfully employed to determine the average radial matter density profile about lens galaxies -- G3L is a three point correlation function that involves either two lenses and one background source or two sources and one lens. The former quantifies the average excess matter about physically close lens pairs, i.e., in excess of the expected lensing signal if all lenses were isolated and scattered without clustering. The latter expresses the lens-to-lens variance of the shear pattern exerted by matter associated with individual lenses. The GFHTLenS allows us for the first time to measure G3L for lenses with varying properties such as luminosity, stellar mass or redshift. In our empirical study, a significant change of the both lensing signals with luminosity (-23
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