PPT-Gravitational Lensing -

6 Extragalactic Microlensing Wambsganss 2001 sharp caustic crossing 23pt lens Local Group vs Extragalactic Microlensing k Local Group Microlensing very very low optical depth. collapses. In . collaboration. . with. . Wen-Biao. Han, & Remo . Ruffini. . ICRANet. & . Physics. . Department. , . University. . of. . Rome. She-Sheng. . Xue. MG13, Stockholm, July 5. weak . lensing. science. Rachel . Mandelbaum. , CMU. Cosmology. A homogeneous . and isotropic. universe. Spatially flat . and . expanding (accelerating!). General Relativity:. 2. Function of the metric (defining space-time behavior). The Child of General Relativity. A Necessary Change. Concepts after Einstein :-. Time is not absolute. There is no ether frame. Notion of . spacetime. Concepts before Einstein :-. There is a preferred reference frame ether. (& Gravitons ?). -. Vishal. . Kasliwal. Classical Electromagnetism. Vacuum. Maxwell Field Equations. Light!!. Electromagnetic waves. Quantum Electromagnetism. Hamiltonian of Quantized. Field. where. 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?. Let’s take a step back to the Einstein days…. Sarah Bridle. University College London. 3d vs 2d (tomography). Non-Gaussian -> higher order statistics. Low redshift -> dark energy. versus. Weak Lensing Tomography. In principle (perfect zs). 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.. 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. Kaiki Taro Inoue . (KINDAI U.). Seminar. @Osaka U 22 Feb 2017. Outline. Missing Satellite Problem. Gravitational Lensing . Substructure vs Line-of-sight Halos. ALMA Observations (SDP.81, MG0414+0534). Gravitational Potential Energy & Kinetic Energy  GPE When you lift an object up, energy is transferred from your muscles in to gravitational potential energy of the object. Gravitational potential energy (GPE) is energy stored in an object because of its position in the earths gravitational field. Design/Motivate/Analyze Surveys. . -- CMB lensing. . -- Primordial Non-. gaussianity. . -- Modified Gravity. Software. . -- Cosmo Simulations. . -- Analysis pipelines. . -- Level 3 Frameworks. Gravitational Lensing of the CMB.