Shape, Color and Distance in Weak Gravitational Flexion
Astrophysics of Galaxies
2021-01-12 v2
Abstract
Canonically, elliptical galaxies might be expected to have a perfect rotational symmetry, making them ideal targets for flexion studies - however, this assumption hasn't been tested. We have undertaken an analysis of low and high redshift galaxy catalogs of known morphological type with a new gravitational lensing code, Lenser. Using color measurements in the u-r band and fit Sersic index values, objects with characteristics consistent with early-type galaxies are found to have a lower intrinsic scatter in flexion signal than late-type galaxies. We find this measured flexion noise can be reduced by more than a factor of two at both low and high redshift.
Keywords
Cite
@article{arxiv.2006.03506,
title = {Shape, Color and Distance in Weak Gravitational Flexion},
author = {Joseph M. Fabritius and Evan J. Arena and David M. Goldberg},
journal= {arXiv preprint arXiv:2006.03506},
year = {2021}
}
Comments
7 pages, 13 figures, submitted to MNRAS