Gravitational Lensing Einstein Ring
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Hubble observations have helped to greatly increase the number of einstein rings known to astronomers.
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Gravitational lensing einstein ring. Animation demonstrating how the gravity from a massive foreground galaxy can bend the light of a more distant galaxy. More complex gravitational lensing arises in observations of massive clusters of galaxies. Animation of a gravitational lens creating an einstein ring. The first was discovered in the radio waveband by hewitt et al 1987.
This results in an einstein ring. The graceful arcs at the center of this image from the hubble space telescope are actually the distorted light of distant galaxies twisted to form an einstein ring by the gravitational. Gravitational lensing is most effective meaning the ring radius is largest when the lensing object is half way between us the and background source. If the two galaxies line up just right the result is a highly distorted image of the distant galaxy known as an einstein ring.
Instead of light from a source traveling in a straight line in three dimensions it is bent by the presence of a massive body which distorts spacetimean einstein ring is a special case of gravitational lensing caused by the exact alignment of the source lens and observer. A gravitational lens is a distribution of matter such as a cluster of galaxies between a distant light source and an observer that is capable of bending the light from the source as the light travels towards the observerthis effect is known as gravitational lensing and the amount of bending is one of the predictions of albert einsteins general theory of relativity. These are called einstein rings named of course for the scientist whose work predicted the phenomenon of gravitational lensing. If source lens and observer are all aligned the light appears as a ring.
Gravitational lensing is predicted by albert einsteins theory of general relativity. From nrao outreach pro. In that event the einstein ring radius is given by this equation. When the lensing approaches perfect symmetry a complete or almost complete circle of light is produced called an einstein ring.
Einstein rings are a particularly interesting manifestation of gravitational lensing producing spectacular arcs and rings from distorted galaxies and stars. An einstein ring also known as an einsteinchwolson ring or chwolson ring is created when light from a galaxy or star passes by a massive object en route to the earth. Due to gravitational lensing the light is diverted making it seem to come from different places.