Shape, Color and Distance in Weak Gravitational Flexion
| Autor: | Fabritius II, Joseph M., Arena, Evan J., Goldberg, David M. |
|---|---|
| Rok vydání: | 2020 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1093/mnras/staa3928 |
| Popis: | 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. Comment: 7 pages, 13 figures, submitted to MNRAS |
| Databáze: | arXiv |
| Externí odkaz: |
|