Journal article
Flexion in Abell 2744
Monthly notices of the Royal Astronomical Society, Vol.476(1), pp.1198-1212
01 May 2018
Abstract
We present the first flexion-focused gravitational lensing analysis of the Hubble Frontier Field observations of Abell 2744 (z = 0.308). We apply a modified Analytic Image Model technique to measure source galaxy flexion and shear values at a final number density of 82 arcmin(-2). By using flexion data alone, we are able to identify the primary mass structure aligned along the heart of the cluster in addition to two major substructure peaks, including an NE component that corresponds to previous lensing work and a new peak detection offset 1.43 arcmin from the cluster core towards the east. We generate two types of non-parametric reconstructions: flexion aperture mass maps, which identify central core, E, and NE substructure peaks with mass signal-to-noise contours peaking at 3.5 sigma, 2.7 sigma, and 2.3 sigma, respectively; and convergence maps derived directly from the smoothed flexion field. For the primary peak, we find a mass of (1.62 +/- 0.12) x 10(14) h(-1)M(circle dot) within a 33 arcsec (105 h(-1) kpc) aperture, a mass of (2.92 +/- 0.26) x 10(13) h(-1)M(circle dot) within a 16 arcsec (50h(-1) kpc) aperture for the north-eastern substructure, and (8.81 +/- 0.52) x 10(13) h(-1)M(circle dot) within a 25 arcsec (80 h(-1) kpc) aperture for the novel eastern substructure.
Metrics
2 Record Views
Details
- Title
- Flexion in Abell 2744
- Creators
- J. P. Bird - Drexel UniversityD. M. Goldberg - Drexel University
- Publication Details
- Monthly notices of the Royal Astronomical Society, Vol.476(1), pp.1198-1212
- Publisher
- Oxford Univ Press
- Number of pages
- 15
- Grant note
- NAS 5-26555 / NASA; National Aeronautics & Space Administration (NASA) HST Frontier Fields
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Identifiers
- 991019168125104721
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Web of Science research areas
- Astronomy & Astrophysics