Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21332201l&link_type=abstract
American Astronomical Society, AAS Meeting #213, #322.01; Bulletin of the American Astronomical Society, Vol. 41, p.377
Astronomy and Astrophysics
Astronomy
Scientific paper
Gravitational lensing studies provide a powerful tool for mapping out the surface mass density in clusters of galaxies. In particular, flexion has been found to be a particularly good probe of structure on smaller scales than traditional weak lensing studies. This technique probes the gradient of the lens field through measurements of higher order distortions (skewness and arciness) in background galaxy images. There are a number of methods by which this information can be used to infer the mass distribution in galaxy clusters, for example parametric modeling or a KSB-type nonparametric reconstruction approach. Here I present an aperture mass statistic for flexion, and show how this can be used to reconstruct the mass (and substructure) distribution in clusters of galaxies on a variety of scales. This technique has several advantages, most notably that the noise properties of the aperture mass statistic are easily characterized and well understood, and that the filter functions incorporated can be tuned to optimize the signal to noise for the mass maps generated.
No associations
LandOfFree
Gravitational Flexion as a Probe of Cluster Substructure does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gravitational Flexion as a Probe of Cluster Substructure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gravitational Flexion as a Probe of Cluster Substructure will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1697884