Quantcast

Latest Twin Quasar Stories

Black Hole Imaged Gobbling Up Accretion Disc
2011-11-04 09:59:30

[ Watch the Video ] A team of scientists has used the NASA/ESA Hubble Space Telescope to observe a quasar accretion disc – a brightly glowing disc of matter that is slowly being sucked into its galaxy´s central black hole. Their study makes use of a novel technique that uses gravitational lensing to give an immense boost to the power of the telescope. The incredible precision of the method has allowed astronomers to directly measure the disc´s size and plot the temperature...

17ae3a92474217cb3ffc9c41808f10d71
2010-07-21 08:10:00

The EPFL's Laboratory of Astrophysics has for the first time observed a quasar that is located between the earth and a more distant galaxy and acts as a gravitational lens A quasar acting as a gravitational lens has now been observed for the first time. This discovery, made by the EPFL's Laboratory of Astrophysics in cooperation with Caltech, represents an advance in the field, since it will allow scientists to weigh and measure a galaxy that contains a quasar. The news is published July 20...

8a90643cf6888275ab6c96410e9e1eda
2010-07-16 07:58:07

Astronomers at the California Institute of Technology (Caltech) and Ecole Polytechnique F©d©rale de Lausanne (EPFL) in Switzerland have discovered the first known case of a distant galaxy being magnified by a quasar acting as a gravitational lens. The discovery, based in part on observations done at the W. M. Keck Observatory on Hawaii's Mauna Kea, is being published July 16 in the journal Astronomy & Astrophysics. Quasars, which are extraordinary luminous objects in the distant...

d5c8f96da0986733dcb4518fca4241431
2009-01-29 09:05:00

Variations in the brightness of the Q0957+561 quasar, also known as the "twin quasar" due to its duplicated image on Earth, are intrinsic to the entity itself and not caused by the gravitational effects of possible planets or stars from a far away galaxy. This is the conclusion of a study carried out by Spanish researchers resolving a mystery that has intrigued astronomers for the past 30 years. The quasar Q0957+561, some 9 billion light years away in the Ursa Major constellation, was...

05f246b2eb3246ae98580d1a6cca51391
2008-12-12 09:58:01

Combining a double natural "magnifying glass" with the power of ESO's Very Large Telescope (VLT), astronomers have scrutinized the inner parts of the disc around a supermassive black hole 10 billion light-years away. They were able to study the disc with a level of detail a thousand times better than that of the best telescopes in the world, providing the first observational confirmation of the prevalent theoretical models of such discs. The team of astronomers from Europe and the US studied...

c7350b425443d9deb0c300ea413947c41
2006-07-25 12:25:00

Cambridge, MA - In the distant, young universe, quasars shine with a brilliance unmatched by anything in the local cosmos. Although they appear starlike in optical telescopes, quasars are actually the bright centers of galaxies located billions of light-years from Earth. The seething core of a quasar currently is pictured as containing a disk of hot gas spiraling into a supermassive black hole. Some of that gas is forcefully ejected outward in two opposing jets at nearly the speed of light....


Latest Twin Quasar Reference Libraries

6_fec4ca0e97baf4ce0833c41b1e6be5e62
2004-10-19 04:45:41

Gravitational Lens -- A gravitational lens is formed when the light from a very distant, bright object (such as a quasar) is "bent" around a massive object (such as a massive galaxy) between the bright object and the viewer. The process is known as gravitational lensing, and was one of the predictions made by Einstein's general relativity. Description In a gravitational lens, the gravity from the massive object bends light as a lens might. As a result, the path of the light from a...

More Articles (1 articles) »
Word of the Day
glogg
  • Scandinavian punch made of claret and aquavit with spices and raisins and orange peel and sugar.
This word comes from the Swedish 'glogg,' which is an alteration of 'glodgat,' mulled (wine).
Related