https://doi.org/10.1140/epjs/s11734-021-00101-4
Regular Article
Accurate modeling of the strong and weak lensing profiles for the galaxy clusters Abell 1689 and 1835
1
Institute for Theoretical Physics, University of Amsterdam, PO Box 94485, 1090 GL, Amsterdam, The Netherlands
2
Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
3
Eureka Scientific, 2452, Delmer Street, Suite 100, 94602-3017, Oakland, CA, USA
Received:
10
December
2020
Accepted:
8
March
2021
Published online:
21
April
2021
An accurate, spherically symmetric description of the mass distribution is presented for two quite virialized galaxy clusters, Abell 1689 and Abell 1835. A suitable regularization of the small eigenvalues of the covariance matrices is introduced. A stretched exponential profile is assumed for the brightest cluster galaxy. A similar stretched exponential for the dark matter and halo galaxies combined, functions well, as do thermal fermions for the dark matter and a standard profile for the halo galaxies. To discriminate between them, sensitive tests have been identified and applied. A definite verdict can follow from sharp data near the cluster centers and beyond 1 Mpc.
© The Author(s) 2021
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