Kavli Institute for the Physics and Mathematics of the Universe

                                                                     The University of Tokyo

Our group is engaged in the study of the evolution of galaxies and their supermassive black holes.  We are actively carrying out observing campaigns in the optical, near-infrared and X-ray. Extragalactic surveys in COSMOS and Chandra Deep Field - South fields are paving the way for wider area efforts with Hyper-Suprime-Cam (imaging), and Prime-Focus-Spectrograph mounted on the Subaru Telescope.

Schramm & Silverman 2013

Hubble Space Telescope images (above) of actively accreting supermassive black holes in the Chandra Deep Field South - Survey are decomposed to separate the nuclear point source and the underlying bulge and disk components of the host galaxy to measure whether galaxies and their supermassive black holes co-evolve.

Galaxies with distinct double nuclei offer a clean method to identify galaxy mergers (Claire Lackner, JDS et al. 2014).  Images shown are taken with the Hubble Space Telescope of the COSMOS field.  This initial study has improved our understanding of the evolution of the rate of mergers up to z ~ 1 and activation of star formation and accretion onto their supermassive black holes.   

CO emission (left panel) indicates the cold molecular gas out of which stars form in galaxy mergers at z ~ 1.6 (JDS et al. 2015; right: Hubble image with CO contours). 

Near-infrared spectra of star-forming galaxies at high redshift the Fiber Multi-Object Spectrograph (FMOS).

Surveying the distant Universe with Subaru Telescope


NEW (July 2015)

catalog and spectra are now public

See Subaru

press release