A CMB lensing analysis of the extended mass distribution of clusters
Event Timeslots (1)
Thursday 11th
-
A CMB lensing analysis of the extended mass distribution of clusters
This study focuses on investigating the anisotropic weak lensing signal associated with the mass distribution of massive galaxy clusters. To do so, we analyze the Cosmic Microwave Background (CMB) data obtained from the Planck Collaboration CMB lensing convergence map (2018). Specifically, we examine patches of it centered on SDSS DR8 redMaPPer clusters within the redshift range [0.4, 0.5]. Using mean radial profiles, we detect a statistically significant signal up to 40 Mpc/h for the κ convergence parameter. Furthermore, by aligning the clusters along their major axis, determined by the distribution of galaxy members, we observe a notable distinction between parallel and perpendicular convergence profiles. On the other hand, by employing a model that implies an anisotropic surface mass density, we obtain results that agree with the mass and ellipticities of the clusters derived by weak lensing shear estimates. These findings provide strong evidence for a correlation between the distribution of galaxy cluster membership and the large-scale mass distribution