Speaker
Description
In this work, we present recent developments and forecasts related to galaxy cluster science within the LSST-Dark Energy Science Collaboration (DESC). Galaxy clusters are among the primary cosmological probes of LSST. However, their use for precision cosmology is challenging as it requires the construction of cluster catalogs from observations and accurate modeling to extract cosmological information. With the recent release of Rubin Observatory Data Preview (DP1) in June 2025, the DESC Cluster working group has been working on coordinating efforts to assess analysis readiness and to begin to exploit this new dataset, in preparation for the upcoming Rubin Observatory Data Preview 2 (DP2) in September 2026 and LSST Data Release 1 (DR1) in early 2028. In this talk, we discuss recent efforts of the DESC clusters working group to build an end-to-end cluster cosmology pipeline, focusing mainly on: i) analysis readiness showcased on simulations using our end-to-end pipeline — from cluster catalog construction with WaZP to cosmological inference; ii) cosmological forecasts from our modeling framework. We will also briefly highlight early science results from the Abell 360 cluster weak lensing analysis with LSST DP1 data, before concluding with outlook and preparation for DP2 and DR1.
| Other topic / keywords: | lsst-desc; galaxy clusters; desc-cluster pipeline |
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