Oral Presentation

Measurement of redshift dependent cross-correlation of HSC clusters and Fermi gamma-rays

Author(s): Atsushi J. Nishizawa(Nagoya)

Presenter: Atsushi Nishizawa (Nagoya University)

The cross-correlation study of the unresolved gamma-ray background (UGRB) by Fermi-LAT with galaxy clusters by Subaru HSC will be presented. The HSC cluster catalogue provides a wide and homogeneous large-scale structure distribution out to the high redshift at z= 1.1, which has not been accessible in previous cross-correlation studies. We conduct the cross-correlation analysis not only for clusters in the all redshift range (0.1< z <1.1) of the survey, but also for subsamples of clusters divided into red-shift bins, 0.1< z <0.6 and 0.6< z <1.1, to utilize the wide redshift coverage of the cluster catalogue. We find the evidence of the cross-correlation signals for all-redshift and low-redshift cluster samples. We also compare the observed signals with predictions of blazars, star-forming galaxies and radio galaxies and find that the signal is consistent with those model predictions.