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SUMMARY:AGN Feedback to Cosmology: eROSITA's Distinct Perspective on Large
 -Scale Structure - Esra Bulbul
DTSTART:20250130T160000Z
DTEND:20250130T170000Z
UID:TALK226213@talks.cam.ac.uk
CONTACT:Matthew Grayling
DESCRIPTION:Abstract: \nGalaxy clusters\, representing the peaks in the co
 smic density field\, serve as an independent and powerful tool for investi
 gating the evolution of cosmic structures. The strategic identification of
  these clusters through multi-wavelength surveys is essential for advancin
 g our understanding of gravitational theory\, general relativity\, and cos
 mological models. A significant milestone was achieved with the successful
  launch of eROSITA in July 2019. The German-built eROSITA X-ray telescope\
 , on board the Russian-German Spectrum-RG (SRG) mission\, operates within 
 the 0.2-8 keV range and has produced the largest ICM-detected catalogs of 
 galaxy clusters and groups through its first All-Sky Survey. With over 10\
 ,000 confirmed clusters\, the survey is pivotal in refining cosmological p
 arameters when combined with the data from optical surveys like DESI Legac
 y\, DES\, HSC\, and KIDS. These parameters are constrained at a percentage
  level through the evolution of the cluster mass function\, representing a
  significant leap forward\, exhibiting a 5-9 times improvement compared to
  previous cluster surveys. In this talk\, I will outline the constraints o
 n fundamental cosmological parameters\, neutrino masses\, and general rela
 tivity derived from the first eROSITA All-Sky Survey. Additionally\, I wil
 l present eROSITA's significant detection of warm baryons within cosmic fi
 laments identified by optical surveys and the implications for our underst
 anding of AGN feedback in group-size haloes. I will summarize the value-ad
 ded products made available to the science community by the eROSITA consor
 tium's data release.\n
LOCATION:Hoyle Lecture Theatre\, Institute of Astronomy
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