Researchers Create Wide-Area Dark Matter Map (News)
Tokyo, Feb. 27 (Jiji Press)—A team of researchers said Tuesday that it has created a wide-area map showing the distribution of dark matter in the universe by using a camera on Japan's Subaru Telescope in Hawaii.
The map covers a wider area and features a higher resolution than any other similar maps, said the team including researchers of the National Astronomical Observatory of Japan and the University of Tokyo.
Dark matter is the mysterious invisible substance that is thought to make up about a quarter of the mass of the universe.
Deeper understanding of the distribution of dark matter would help check the validity of the theory that the expansion of the universe is speeding up. Study on dark matter would also help understand better how galaxies and galaxy clusters have been formed.
The camera, called Hyper Suprime-Cam, entered into full service in 2013. It captures a wide area in the sky equivalent to the combined size of nine full moons in one shot.[Copyright The Jiji Press, Ltd.]