15-20 March 2020
Europe/Berlin timezone

Characterization of the X-ray properties of the eFEDS detected Clusters

17 Mar 2020, 09:50


Oral Presentation Clusters and Cosmology I


Vittorio Ghirardini (Max Planck Institute for extraterrestrial physics)


Constraints on cosmology from cluster number count strongly depend on the accuracy of cluster masses which are sensitive to the dynamical state of clusters, thus it is of importance to be able to measure accurately the dynamical state of each cluster. eROSITA telescope on board of Spectrum-Roentgen-Gamma (SRG) mission was launched in July 2019. eROSITA's large effective area, good spatial resolution, and a large field of view allow observing large areas of the sky. eROSITA Final Equatorial Survey, the largest contiguous, uniformly sampled X-ray field scan to date was completed in just 4 days during the Performance Verification phase. We found more than 400 extended sources in the 140 square degree eFEDS field. In this talk, we will present the measurements of several morphological parameters: surface brightness concentration, ellipticity, cuspiness, power ratios, and photon asymmetry of eFEDS extended sources. The fractional number of clusters with cool-core/non-cool-cores will allow us to investigate the distribution of the morphological parameters with respect to their mass and dynamical state.

Primary author

Vittorio Ghirardini (Max Planck Institute for extraterrestrial physics)

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