Gravitational lensing astronomy
[DOC File]Astronomy at the University of Texas at Austin
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Finally a technique known as gravitational lensing can be used to calculate the distance from the lensing galaxy to the sun. This technique is only currently being used for quasars that are being lensed. This is because quasars have a time dependant variance in the light they emit.
[DOC File]Astronomy 07/Int
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Finally, can even estimate the amount of unseen matter needed to produce the distorted images of galaxy clusters (25.29) by gravitational lensing (25.27, 25.28). Again, need large amounts of unseen matter everywhere. Some regard this as the only direct detection . of dark matter (see the “dark matter maps” in 25.30 and 25.31)
[DOC File]Astronomical Distance Ladder - Angelfire
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e. Strong gravitational lensing from galaxies, clusters . 35. If a galaxy is measured to have a redshift of 7200 km/s, what is its approximate distance from Earth assuming our best estimate of the Hubble constant? a. 1 Mpc. b. 10 Mpc. c. 100 light years. d. 100 Mpc. e. 14 Mpc. 36.
[DOCX File]Research Final Report.docx
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Can test for these types of objects using gravitational lensing (Fig. 23.23). Must observe millions of stars every few days over a period of years, bcause the flickering should be very rare. Exotic particles—some theories of particle physics predict there should exist a zoo of these massive particles, but we have no idea which ones could be ...
[DOC File]Black Holes - schoolphysics
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Gravitational lensing is a directly observable effect of general relativity. Relativity predicts that the presence of mass causes light beams to bend. This manifests in a couple different ways, but the most dramatic of which is strong lensing.
[DOC File]Review for Astronomy 3 Midterm #2
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39. Gravitational lensing is the process by which. A) the wavelengths of light from a star are shifted as it moves about its center of mass. B) a planet passes in front of its parent star and blocks part of its light. C) a massive object accelerates another object that passes close to it
An Introduction to Gravitational Lensing
Gravitational lensing. If light from a more distant object passes near a massive object before reaching you it will be bent by the gravity of the object nearer to you. This can make its shape appear distorted and sometimes cause several images of the same object to occur.
[DOC File]STUDY GUIDE FOR CHAPTER 1
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Gravitational lensing The effects of Black Holes on light from distant galaxies have been observed. The gravitational pull of a black hole is so great that it actually distorts the space around it – in this distorted space light actually curves and we get what astronomers call gravitational lensing.
[DOC File]Notes on Ch - Astronomy at the University of Texas at Austin
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We can also use gravitational lensing, whereby the principles of general relativity light bends in the presence of a massive object (so we can see distant objects when they pass behind foreground objects). This helps us map the distribution of dark matter in a galaxy cluster. Most galaxies will eventually interact with another galaxy.
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