Superbright Quasar Could Shed Light on Universe’s Youth


An artist’s illustration of a radio jet spewing out fast-moving material from the newly discovered quasar PSO J352.4034-15.3373, which lies about 13 billion light-years from Earth. Artwork by Robin Dienel, courtesy of Carnegie Institution for Science. Credit: Credit: Robin Dienel/Carnegie Institution for Science
A newfound quasar is blasting out the brightest radio emissions ever observed in the early universe, new research reports.

By Chelsea Gohd | SPACE.com

Quasars, the brightest objects in the cosmos, are comprised of giant black holes gobbling up matter at the hearts of massive galaxies. Quasars emit mostly radio waves, which have the longest wavelengths in the electromagnetic spectrum, much longer than those of visible light.

The newly discovered quasar, called PSO J352.4034-15.3373, lies nearly 13 billion light-years from Earth — meaning its radio emissions have zoomed through space for about 13 billion years before reaching our planet.

PSO J352.4034-15.3373 therefore provides a look at the early days of the universe, which came into being with the Big Bang 13.82 billion years ago. And looks of this kind are pretty rare, the quasar’s discoverers said.

„There is a dearth of known strong radio emitters from the universe’s youth, and this is the brightest radio quasar at that epoch by an order of magnitude,“Eduardo Bañados, of the Carnegie Institution of Science in Washington, D.C., said in a statement.

Bañados led the team that found PSO J352.4034-15.3373. That initial discovery was followed up by Emmanuel Momjian of the National Radio Astronomy Observatory, whose observations allowed astronomers to characterize the quasar — and to spot a jet of superfast plasma spewing from the exotic object.

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