Perseus cluster tagged posts

An international team of astronomers has conducted a detailed kinematic study of a radio galaxy known as 3C 84. The research sheds more light on the properties of this source and its connection to gamma-ray emission. The study was detailed in a paper published April 7 on the arXiv pre-print repository.

Radio galaxies emit huge amounts of radio waves from their central cores. Black holes at the centers of these galaxies accrete gas and dust, generating high-energy jets visible in radio wavelengths, which accelerate electrically charged particles to high velocities.

Astronomers are especia...

Upper right: This is a Hubble Space Telescope image of galaxy NGC 1277. Background: The galaxy lives near the center of the Perseus cluster of over 1,000 galaxies, located 240 million light-years away from Earth. Credit: NASA, ESA, M. Beasley (Instituto de Astrofísica de Canarias), and P. Kehusmaa

Astronomers have put NASA’s Hubble Space Telescope on an Indiana Jones-type quest to uncover an ancient “relic galaxy” in our own cosmic backyard. The very rare and odd assemblage of stars has remained essentially unchanged for the past 10 billion years. This wayward stellar island provides valuable new insights into the origin and evolution of galaxies billions of years ago...

Two images show the Perseus cluster of galaxies. The image on the left shows a close up image of active galaxy NGC 1275, the central, dominant member of the Perseus cluster (credit: Data – Hubble Legacy Archive, ESA, NASA; Processing – Al Kelly). The image on the right shows the cluster using an X-ray telescope revealing the atmosphere of plasma enveloping the whole galaxy cluster.

Data from a now-defunct X-ray satellite is providing new insights into the complex tug-of-war between galaxies, the hot plasma that surrounds them, and the giant black holes that lurk in their centres. Launched from Japan on February 17, 2016, the Japanese space agency (JAXA) Hitomi X-ray Observatory functioned for just over a month before contact was lost and the craft disintegrated...