Kavli Institute for the Physics and Mathematics of the Universe

                                                                     The University of Tokyo

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

X-rays (purple), detected by the Chandra Observatory, from a supermassive black hole being activated in galaxies undergoing a merger as evident from HST imaging and VLT spectroscopy.

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 to be mounted on the Subaru Telescope.

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.   

Schramm & Silverman 2013

Surveying the distant Universe with Subaru Telescope


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.