PPT-Gravitational Lensing

and Quasars A man should look for what is and not what he thinks should be Albert Einstein Arvind Haran and David Johnston What is Gravitational Lensing Lets take a step back to the Einstein days. Millisecond . Pulsars:. Dan Stinebring. Oberlin College. CWRU – May 21, 2009. . George Greenstein. (Amherst College). Discovery of “Millisecond” Pulsars. 1982 – Arecibo Observatory – Don Backer, Sri Kulkarni, .... Surveys of large scale structure will probe Dark Energy by measuring the BAO scale vs. redshift. . Planned:. DESI, Euclid, WFIRST, .... 2. Hydrogen Intensity Mapping. To measure BAO scale there is no need to resolve individual galaxies. Map intensity of HI gas using redshifted 21 cm emission along the line of sight.. collapses. In . collaboration. . with. . Wen-Biao. Han, & Remo . Ruffini. . ICRANet. & . Physics. . Department. , . University. . of. . Rome. She-Sheng. . Xue. MG13, Stockholm, July 5. ULTRA-RELATIVISTIC COLLISIONS. Theodore Tomaras. University of Crete. Motivation. The relevance of classical gravity. A slightly simpler model – scalar radiation. The local and the non-local source. Redshift. in Clusters of Galaxies. Marton Trencseni. Eotvos. University, Budapest. Gravitational . Redshift. Photon escapes from gravitational well. G. ains potential energy. Speed cannot decrease =). D.S. . Hajdukovic. GBAR Collaboration Meeting. 18. th. April 2012. Our best physics . The Standard Model of Particles and Fields. +. . General Relativity . is . considered. as insufficient to explain the observed phenomena in Astrophysics and Cosmology.. Antony Lewis. http://cosmologist.info/. Lewis . arXiv:1204.5018. see also . Creminelli. . et al . astro-ph. /0405428, . arXiv:1109.1822, . Bartolo. et al arXiv:1109.2043. Lewis . arXiv:1107.5431. Lewis. To help explain how two bodies that are not in contact can exert a force on one another (i.e. gravitational, magnetic or electrostatic) we use the concept of fields. .. Fields are spheres of influence. They are invisible and intangible; they simply demonstrate how strong a characteristic is at a certain distance.. Examples of Lens Systems. about 1 arcminute. about 1 arcsecond. Galaxy Clusters. Galaxies. More examples. Clusters of galaxies as lenses. T. Johnson . (U Michigan). Many examples. are known, but. strong lensing. Overview of Why and How. Dan Burbank and Tony Young. AST5022. Introduction. Background. Physics. Sources. Detectors and Detector Implications. Questions. Gravitational Waves . Speed-of-light wave propagation solution of Einstein’s Field Equations. Gravitational Waves. Prediction. General Relativity – 1915. Gravity is not the pulling force envisioned by Kepler or Newton. Space warps around massive objects. Accelerating massive objects could radiate distortions like the wake of a boat. in Globular Clusters. Margarita . Safonova. . Ancient Greeks knew that light travels in a straight line... Or you wouldn’t be able to cross the road!. Gravitational . Lensing. —. Astronomical Mirages. D.S. . Hajdukovic. GBAR Collaboration Meeting. 18. th. April 2012. Our best physics . The Standard Model of Particles and Fields. +. . General Relativity . is . considered. as insufficient to explain the observed phenomena in Astrophysics and Cosmology.. SpeakerSherry SuyuInstitutionMax Planck Institute for Astrophysics MunichTitleCosmology with Gravitational Lens Time DelayAbstractStrong gravitational lenses with measured time delays between the mult