quasar – Page 4 – Astronomy Now

Space telescopes measure speed and shape of ultra-fast quasar winds

20 February 2015 Astronomy Now

Astronomers using NASA and ESA X-ray space telescopes discover that PDS 456, an extremely bright black hole known as a quasar more than 2 billion light-years away, sustains winds that carry more energy every second than is emitted by more than a trillion suns.

Black hole on a diet creates a ‘changing look’ quasar

24 January 2015 Astronomy Now

Yale University-led researchers have been able to study both the bright and dim phases of a quasar in a single source, an object that had dimmed by a factor of six or seven, compared with observations from a few years earlier.

Illustris Collaboration depiction of large-scale structure in the universe.

Quasar axes align with large-scale cosmic structures

19 November 2014 Astronomy Now

A European research team has used data from ESO’s Very large Telescope in Chile to discover that the rotational axes of quasars align with large-scale structures in the universe.