HSC tagged posts

An example of 3D distribution of dark matter reconstructed via tomographic methods using the weak lensing technique combined with the redshift estimates of the background galaxies. (Credit: University of Tokyo/NAOJ)

A research team of multiple institutes, including the National Astronomical Observatory of Japan and University of Tokyo, released an unprecedentedly wide and sharp dark matter map based on the newly obtained imaging data by Hyper Suprime-Cam on the Subaru Telescope. The dark matter distribution is estimated by the weak gravitational lensing technique. The team located the positions and lensing signals of the dark matter halos and found indications that the number of halos could be inconsistent with what the simplest cosmological model suggests...

Images of 3 DOG’s. The left, middle, and right panels show optical image from HSC, near-infrared image from VIKING, and mid-infrared image from WISE, respectively. The image size is 20 square arcsecond (1 arcsecond is 1/3600 degree). It is clear that DOGs are faint in the optical, but are extremely bright in the infrared. Credit: Image courtesy of National Astronomical Observatory of Japan

As they harbor rapidly growing black holes in their centers, these results give us clues for understanding the evolution of galaxies and supermassive black holes. The research group discovered 48 DOGs, and measured how common they are using Subaru Strategic Program with Hyper Suprime-Cam (HSC), a new wide-field camera with a field of view 9X the size of the moon.

How did galaxies form and evolve during t...