Press Release

2017

Uncovering the Origins of Galaxies' Halos
Uncovering the Origins of Galaxies' Halos November 20, 2017

Using HSC on the Subaru Telescope, researchers from Tohoku University and NAOJ have identified 11 dwarf galaxies and two star-containing halos in the outer region of a large spiral galaxy 25 million light-years away from Earth. The findings provide new insight into how these 'tidal stellar streams' form around galaxies.

More
Minor Merger Kicks Supermassive Black Hole into High Gear
Minor Merger Kicks Supermassive Black Hole into High Gear October 30, 2017

A team of researchers used the Subaru Telescope to study the galaxy M77, which is famous for its super-active nucleus that releases enormous energy. The unprecedented deep image of the galaxy reveals evidence of a hidden minor merger billions of years ago. The discovery gives crucial evidence for the minor merger origin of active galactic nuclei.

More
Optical/Infrared Telescopes Follow Gravitational Waves to Treasure
J-GEM Follows Gravitational Waves to Treasure October 16, 2017

Astronomers have tracked down the source of a gravitational wave and discovered the first observed kilonova: a nuclear furnace 100 million times brighter than the Sun producing thousands of times the entire mass of the Earth in heavy elements such as precious metals.

More
Surface Helium Detonation Spells End for White Dwarf
Surface Helium Detonation Spells End for White Dwarf October 4, 2017

An international team of researchers has found evidence that the brightest stellar explosions in our Universe could be triggered by helium nuclear detonation near the surface of a white dwarf star. Using Hyper Suprime-Cam mounted on the Subaru Telescope, the team detected a type Ia supernova within a day after the explosion, and explained its behavior through a model calculated using the supercomputer ATERUI.

More
Subaru Telescope Detects the Shadow of a Gas Cloud in an Ancient Proto-supercluster
Subaru Telescope Detects the Shadow of a Gas Cloud in an Ancient Proto-supercluster March 28, 2017

By using the Suprime-Cam on the Subaru Telescope, a team led by researchers at Osaka Sangyo University succeeded in making the widest map of neutral hydrogen gas in the early universe (corresponding to a time about 11.5 billion years ago). They found that the neutral hydrogen gas widely spreads out across 160 million light-years in and around the proto-supercluster.

More
Saturn's Rings Viewed in the Mid-infrared Show Bright Cassini Division
Saturn's Rings Viewed in the Mid-infrared February 23, 2017

A team of researchers has succeeded in measuring the brightnesses and temperatures of Saturn's rings using the mid-infrared images taken by the Subaru Telescope in 2008. The images are the highest resolution ground-based views ever made. They reveal that, at that time, the Cassini Division and the C ring were brighter than the other rings in the mid-infrared light and that the brightness contrast appeared to be the inverse of that seen in the visible light.

More
Tracing the Cosmic Web with Star-forming Galaxies in the Distant Universe
Tracing the Cosmic Web with Star-forming Galaxies in the Distant Universe January 30, 2017

By using the Subaru Telescope, an international team led by Hiroshima University researcher has revealed a picture of the increasing fraction of massive star-forming galaxies in the distant universe. Massive star-forming galaxies about 5 billion years ago trace large-scale structure in the universe. About 3 billion years ago, massive star-forming galaxies are no longer apparent.

More
Cosmic Lenses Bring the Universe's Expansion into Sharper Focus
Cosmic Lenses Bring the Universe's Expansion into Sharper Focus January 26, 2017

By using galaxies as giant gravitational lenses, an international group of astronomers has made an independent, very accurate measurement of how fast the Universe is expanding. Wide field view instruments at the Subaru Telescope were essential for these findings.

More





























Guidelines for use

document navigation

local navigation

Press Release