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Abstract: We present a weak lensing analysis of the Coma Cluster using the SloanDigital Sky Survey SDSS Data Release Five. Complete imaging of a ~ 200 squaredegree region is used to measure the tangential shear of this cluster. Theshear is fit to an NFW model and we find a virial radius ofr {200}=1.99 {-0.22}^{+0.21}h^{-1}Mpc which corresponds to a virial mass ofM {200}=1.88 {-0.56}^{+0.65}\times10^{15}h^{-1}M {\odot}. We additionallycompare our weak lensing measurement to the virial mass derived using dynamicaltechniques, and find they are in agreement. This is the lowest redshift,largest angle weak lensing measurement of an individual cluster to date.



Autor: Jeffrey M. Kubo, Albert Stebbins, James Annis, Ian P. Dell'Antonio, Huan Lin, Hossein Khiabanian, Joshua A. Frieman

Fuente: https://arxiv.org/







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