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Modelling Baryonic Effects on Galaxy Cluster Mass Profiles
Masato Shirasaki, Erwin T. Lau, Daisuke Nagai
Gravitational lensing is a powerful probe of the mass distribution of galaxy clusters and cosmology. However, accurate measurements of the cluster mass profiles are limited by unce…
Dark matter dynamics in Abell 3827: new data consistent with standard Cold Dark Matter
Richard Massey, David Harvey, Jori Liesenborgs +23
We present integral field spectroscopy of galaxy cluster Abell 3827, using ALMA and VLT/MUSE. It reveals an unusual configuration of strong gravitational lensing in the cluster cor…
Discovery of an HI-rich Gas Reservoir in the Outskirts of SZ-effect Selected Clusters
Sowgat Muzahid, Jane Charlton, Daisuke Nagai +2
We report on the detection of three strong HI absorbers originating in the outskirts (i.e., impact parameter, ) of three massive ($M_{500}\sim…
Investigating Cluster Astrophysics and Cosmology with Cross-Correlation of the Thermal Sunyaev-Zel'dovich Effect and Weak Lensing
Ken Osato, Samuel Flender, Daisuke Nagai +2
Recent detections of the cross-correlation of the thermal Sunyaev-Zel'dovich (tSZ) effect and weak gravitational lensing (WL) enable unique studies of cluster astrophysics and cosm…
Physical Origins of Gas Motions in Galaxy Cluster Cores: Interpreting Hitomi Observations of the Perseus Cluster
Erwin T. Lau, Massimo Gaspari, Daisuke Nagai +1
The Hitomi X-ray satellite has provided the first direct measurements of the plasma velocity dispersion in a galaxy cluster. It finds a relatively "quiescent" gas with a line-of-si…
The galaxy group NGC2563
Andrea Morandi, Ming Sun, John Mulchaey +2
We present a study of the hot intragroup medium (hIGM) of the galaxy group NCG2563. The mosaic observations, with a total exposure time of ~430 ks, allow the ga…