File:Simulations Show Webb Telescope Can Reveal Distant Galaxies Hidden in Quasars’ Glare (51145160561).png
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[edit]DescriptionSimulations Show Webb Telescope Can Reveal Distant Galaxies Hidden in Quasars’ Glare (51145160561).png |
Quasars are the brightest objects in the universe and among the most energetic. They outshine entire galaxies of billions of stars. A supermassive black hole lies at the heart of every quasar, but not every black hole is a quasar. Only the black holes that are feeding most voraciously can power a quasar. Material falling into the supermassive black hole heats up and causes a quasar to shine across the universe like a lighthouse beacon. Although quasars are known to reside at the centers of galaxies, it’s been difficult to tell what those galaxies are like and how they compare to galaxies without quasars. The challenge is that the quasar’s glare makes it difficult or impossible to tease out the light of the surrounding host galaxy. It’s like looking directly into a car headlight and trying to figure out what kind of automobile it is attached to. A new study suggests that NASA’s James Webb Space Telescope, set to launch in 2021, will be able to reveal the host galaxies of some distant quasars despite their small sizes and obscuring dust. Read more: <a href="https://www.nasa.gov/feature/goddard/2020/simulations-show-webb-telescope-can-reveal-distant-galaxies-hidden-in-quasars-glare" rel="noreferrer nofollow">www.nasa.gov/feature/goddard/2020/simulations-show-webb-t...</a> Image: These simulated images show how a quasar and its host galaxy would appear to NASA’s upcoming James Webb Space Telescope (top) and Hubble Space Telescope (bottom) at infrared wavelengths of 1.5 and 1.6 microns, respectively. Webb’s larger mirror will provide more than 4 times the resolution, enabling astronomers to separate the galaxy’s light from the overwhelming light of the central quasar. The individual images span about 2 arcseconds on the sky, which represents a distance of 36,000 light-years at a redshift of 7. Credits: M. Marshall (University of Melbourne) <a href="https://www.nasa.gov/multimedia/guidelines/index.html" rel="noreferrer nofollow">NASA Media Use Policy</a> <a href="https://twitter.com/#!/NASAWebb" rel="noreferrer nofollow">Follow us on Twitter</a> <a href="http://www.facebook.com/nasawebb%e2%80%9d rel=" rel="noreferrer nofollow">Like us on Facebook</a> <a href="https://www.youtube.com/nasawebbtelescope" rel="noreferrer nofollow">Subscribe to our YouTube channel</a> <a href="http://instagram.com/NASAWebb" rel="noreferrer nofollow">Follow us on Instagram</a> |
Date | |
Source | Simulations Show Webb Telescope Can Reveal Distant Galaxies Hidden in Quasars’ Glare |
Author | NASA's James Webb Space Telescope from Greenbelt, MD, USA |
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This image was originally posted to Flickr by James Webb Space Telescope at https://flickr.com/photos/50785054@N03/51145160561. It was reviewed on 17 June 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
17 June 2023
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File change date and time | 13:37, 14 October 2020 |