Another Word For It Patrick Durusau on Topic Maps and Semantic Diversity

December 21, 2014

The Frontier Fields Lens Models

Filed under: Astroinformatics — Patrick Durusau @ 5:25 pm

The Frontier Fields Lens Models

From the post:

Abell 2744: Overlay of magnification (red) and mass models (blue) on the full-band HST imaging (green)


Bradač et al.

CATS Team

Merten, Zitrin et al.

Sharon et al.

Williams et al.


The Frontier Fields (FF) are selected to be among the strongest lensing clusters on the sky. In order to interpret many of the properties of background lensed galaxies, reliable models of the lensing maps for each cluster are required. Preliminary models for each of the six Frontier Fields clusters have been provided by five independent groups prior to the HST Frontier Fields observing campaign in order to facilitate rapid analysis of the FF data by all members of the community. These models are based upon a common set of input data, including pre-FF archival HST imaging and a common set of lensed galaxies.

The public Frontier Fields lens models include maps of mass (kappa) and shear (gamma) from which magnifications can be derived at any redshift using the script provided. Magnification maps pre-computed at z = {1,2,4,9} are also available for download. The models cover regions constrained by strongly lensed, multiply-imaged galaxies, within the HST ACS fields of view of the cluster cores. The Merten models extend to larger areas, including the FF parallel fields, as they incorporate ground-based weak lensing data. For a description of the methodology adopted by each group, see this webpage, and the links to each map-maker below. Also see this primer on gravitational lensing.

On the off-chance that you did not get the Hubble Space Telescope observing time you wanted as a present, here are models for lensing galaxy clusters. Data is included.

Enjoy!

PS: This is a model for data and processing sharing. A marked contrast with some government agencies.

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