Astronomers discover dozen quasars warped by naturally occurring cosmic 'lens'
3 years, 11 months ago

Astronomers discover dozen quasars warped by naturally occurring cosmic 'lens'

India Today  

A group of astronomers have discovered a dozen quasars that have been warped by a naturally occurring cosmic "lens" and split into four similar images. Quadruply-imaged quasars, like those found by @ESAGaia, are unique tools to learn more about dark matter and the expansion rate of the Universe https://t.co/IVeDsQ7Fr7 Image credit: R. Hurt /The GraL Collaboration pic.twitter.com/ketC10OLGR — ESA Science April 8, 2021 Quadruply imaged quasars are rare, and the first quadruple image was discovered in 1985. Over the past four decades, astronomers had found about fifty of these "quadruply imaged quasars" or quads for short, which occur when the gravity of a massive galaxy that happens to sit in front of a quasar splits its single image into four, the Department of Science and Technology said. They can help determine the expansion rate of the universe and help address other mysteries, such as dark matter and quasar ''central engines''," said Daniel Stern, lead author of the new study and a research scientist at the Jet Propulsion Laboratory USA.

Dst Quasars  dst  naturally  quasars  help  universe  rare  occurring  astronomers  quads  dozen  discover  lens  rate  cosmic  warped  expansion  study

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Mapping the universe: Scientists create the largest EVER chart of active supermassive black holes - featuring over one million voids
1 year ago

Mapping the universe: Scientists create the largest EVER chart of active supermassive black holes - featuring over one million voids

Daily Mail  

They're probably the most feared objects in the universe – huge concentrations of tightly-packed matter that can gobble up entire planets. The new map specifically shows 'quasars' – supermassive black holes that are actively feeding on material and emit electromagnetic radiation, becoming incredibly bright and luminous. An infographic explaining the creation of a new map of around 1.3 million quasars …

Astronomers just solved a 60-year mystery regarding the brightest objects in the universe
1 year, 10 months ago

Astronomers just solved a 60-year mystery regarding the brightest objects in the universe

Salon  

One of the most mysterious objects in the universe just got a little less mysterious. Indeed, these violent interweavings can cause enough gas to flow towards the core supermassive black holes, initiating quasar activity even before the two galaxies fully merge. "Quasars play a key role in our understanding of the history of the Universe, and possibly also the future …

Week in tech: The secret behind quasars
1 year, 10 months ago

Week in tech: The secret behind quasars

Live Mint  

Here’s our weekly round-up of updates from the world of science and technology that you might have missed. In a new study, an international team of researchers said they now have clear evidence that quasars are triggered by two galaxies colliding, which releases the vast amounts of energy needed. Scientists sound ocean warming warning The temperature of oceans around the …

Astronomers discover 83 super-massive black holes
6 years ago

Astronomers discover 83 super-massive black holes

India TV News  

An international team of astronomers has discovered 83 "quasars", extremely luminous active galactic nucleus powered by supermassive black holes in the distant universe, from a time when the universe was less than 10 per cent of its present age. "We will also learn about formation and early evolution of supermassive black holes, by comparing the measured number density and luminosity …

Brightest quasar ever discovered shines with the intensity of 600 trillion Suns
6 years, 2 months ago

Brightest quasar ever discovered shines with the intensity of 600 trillion Suns

Firstpost  

The quasar is almost a universe away, and was only spotted due to a rare phenomenon in physics. 12.8 billion years later, the Hubble telescope has now picked up on the object’s bright light – 600 trillion times as bright as our Sun. “We don’t expect to find many quasars brighter than that in the whole observable universe,” said Xiaohui …

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