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Like all (unobscured) active galaxies, quasars can be strong X-ray sources. Radio-loud quasars can also produce X-rays and gamma rays by inverse Compton scattering of lower-energy photons by the radio-emitting electrons in the jet. [52] Iron quasars show strong emission lines resulting from low-ionization iron (Fe II), such as IRAS 18508-7815.
In 1964 a quasar became the most distant object in the universe for the first time. Quasars would remain the most distant objects in the universe until 1997, when a pair of non-quasar galaxies would take the title (galaxies CL 1358+62 G1 & CL 1358+62 G2 lensed by galaxy cluster CL 1358+62). [55]
A large quasar group (LQG) is a collection of quasars (a form of supermassive black hole active galactic nuclei) that form what are thought to constitute the largest astronomical structures in the observable universe. LQGs are thought to be precursors to the sheets, walls and filaments of galaxies found in the relatively nearby universe. [1]
The luminous cores of distant, ancient galaxies, quasars expel jets of energetic matter. With the help of two powerful radio telescopes, astronomers spotted the gigantic two-lobed jet, which spans ...
Scientists using the observatory have discovered a tightly-packed "knot" of at least three galaxies that were forming around a quasar 11.5 billion years ago, just over 2 billion years after the ...
Using the James Webb Space Telescope, scientists captured a rich image teeming with some 20,000 galaxies. At center is one of the most brilliant objects in space: a quasar, which is a supermassive ...
The pair of galaxies were found lensed by galaxy cluster CL1358+62 (z = 0.33). This was the first time since 1964 that something other than a quasar held the record for being the most distant object in the universe.
Contains about 56,000 galaxies, located 820 million light years away. BOSS Great Wall (BGW) (2016) 1,000,000,000: Structure consisting of 4 superclusters of galaxies. The mass and volume exceeds the amount of the Sloan Great Wall. [22] Perseus–Pegasus Filament (1985) 1,000,000,000: This galaxy filament contains the Perseus–Pisces Supercluster.