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[1909.02179] Probing Cosmology and Cluster Astrophysics with Multi-Wavelength Surveys I. Correlation Statistics

Posted: September 17 2019
by Cosmo Comments
This paper was commented on through Cosmo Comments. The following comments can also be viewed as annotations on the paper via Hypothesis.

This paper explores the exciting possibility of jointly analyzing muti-wavelength galaxy cluster survey data, through examining the correlation statistics between tSZ, x-ray and lensing observations. The paper is written in light of the eRosita, CMB-S4 and LSST experiments and shows that combining data from the three probes would greatly improve cosmology and cluster astrophysics constraints.

As the authors pointed out, there are effects that are not yet considered in their formalism (and this modesty is really admirable). Nevertheless, the work is timely, inspiring and insightful. I learned a great deal from this paper and am really looking forward to seeing the forthcoming papers.

I do have a quick question. The paper is written in the context of “galaxy cluster surveys”, but finding galaxy clusters didn’t seem necessary in the observations/models that the paper describes. What is the direct relevance of the study to “galaxy clusters”, is it the angular scale that the study focuses on?

[These comments were shared with us by a member of the cosmology community. They do not necessarily reflect the opinion of the Cosmo Comments team.]