![]() GR predicts that photons climbing up out of the Earth's gravitational field will lose energy and therefore increase in wavelength. Robert Pound and Glen Rebka were looking for evidence of a gravitational redshift of light. In 1960, two Physicists, one on the roof of the Harvard Physics Laboratory, and one in the basement carried out a major test of General Relativity (GR), Einstein's theory of gravity. Their policies may differ from this site. Some links on this page may take you to non-federal websites. Some full text articles may not yet be available without a charge during the embargo (administrative interval). When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH These estimators will be applied to the simulated data to carry out tests and to make predictions, which will be applied to existing galaxy catalogs. ![]() Optimal statistical estimators will be formulated to best constrain the large-scale gravitational potential. Analytic theory and large scale realistic cosmological simulations will be employed to make predictions for gravitational redshifts of galaxies in various environments. With a collaborative team including computer science and graphics students at Carnegie Mellon, a computer game for public outreach will be developed based on cosmological structure formation. Broader impacts of the work include training of undergraduate and graduate students, and a postdoctoral researcher. There is also a plan to validate this method with numerical simulations. This program will develop a method of measuring the gravitational redshift effect (change in the frequency of light waves), which has become a new means of testing general relativity on on the scale of galaxies. ![]() Primary Place of Performance Congressional District:Ġ40100 NSF RESEARCH
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