X-ray image of Perseus cluster (color) and spectrum of iron line taken by Soft X-ray Spectrometer onboard Hitomi (white). Credit: Hitomi collaboration/JAXA/NASA/ESA/SRON/CSA

Soft X-ray spectrometer onboard Hitomi X-ray satellite observed Perseus cluster of galaxies.

It is discovered that the hot gas in the central region is "quiet", although jets from the central super-massive blackhole collide with the hot gas.

This result will be released to Nature online.

For the detail, please check JAXA.

Bamba ＆ Nakazawa Group