Sentences with phrase «lensed background galaxy»
The distorted blue arcs visible around the center of the picture are the lensed background galaxy.
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Fritz Zwicky used it for the first time to declare the observed phenomena consistent with dark matter observations as the rotational speeds of galaxies and orbital velocities of galaxies in clusters, gravitational lensing of background objects by galaxy clusters such as the Bullet cluster, and the temperature distribution of hot gas in galaxies and clusters of galaxies.
Dark Matter is thought to exist because of its gravitational effects on stars and galaxies, gravitational lensing (the bending of light rays) around these, and through its imprint on the Cosmic Microwave Background (the afterglow of the Big Bang).
However, through the phenomenon known as «gravitational lensing,» a massive, foreground cluster of galaxies acts as a natural «zoom lens» in space by magnifying and stretching images of far more distant background galaxies.
It is also possible to use the way the gravity of clusters of galaxies distort more distant background galaxies, weak gravitational lensing, as another tracer.
Image of the gravitational lens RX J1131 - 1231 galaxy with the lens galaxy at the center and four lensed background quasars.
This strongly suggested that two distinct background galaxies were being lensed by the foreground galaxy.
Combining the available images and removing the haze of the lensing galaxy's collection of stars, the result was very clear: an almost perfect Einstein ring, indicating a gravitational lens with very precise alignment of the lens and the background light source [1].
By cross-correlating large - scale surveys of galaxies and observations of how galaxies distort background light in a relativistic process known as weak lensing, Ferreira says, the true nature of mass and the forces acting on it can be tested.
The cluster is so massive that its powerful gravity bends the light from galaxies far behind it, making background objects appear larger and brighter in a phenomenon called gravitational lensing.
[4] Gravitational lensing magnifies the light from fainter, background objects, allowing Hubble to spy galaxies it would otherwise not be able to detect.
The cluster's powerful gravity warps the images of background galaxies into blue streaks and arcs that give the illusion of being inside the cluster, an effect known as gravitational lensing.
NASA said the background galaxy has been magnified, distorted and multiply imaged by the gravity of the galaxy cluster in a process known as gravitational lensing.
Below is a picture from the Hubble Space Telescope showing the lensing of a background galaxy by a cluster of galaxies in front.
These high resolution images also showed that the lensing galaxy is an edge - on disc galaxy — similar to our galaxy, the Milky Way — which obscures parts of the background light due to the large dust clouds it contains.
By studying the observed deflections and distortions of background galaxies, astronomers build up a model of each galaxy cluster's mass distribution (primarily dark matter) and the resulting lensing magnifications.
Gravitational lensing not only distorts the image of a background galaxy, it can also amplify its light.
«The polarization of the waves coming from the background quasar, combined with the fact that the waves producing the two lensed images traveled through different parts of the intervening galaxy, allowed us to learn some important facts about the galaxy's magnetic field,» said Sui Ann Mao, Minerva Research Group Leader for the Max Planck Institute for Radio Astronomy in Bonn, Germany.