PPT-CMB cluster lensing

Towards the first detection using SPT polarisation ASA 2016 meeting Sydney 04 07 2016 Srinivasan Raghunathan School of Physics University of Melbourne In a nutshell South Pole Telescope Observes CMB both T and P. Roger in 2006 in Leiden Do we really understand clusters well enough to use them for cosmological studies Maru711sa in 2006 in Leiden Lensing Xray 20 Paul in 2002 in Ringberg Lensing masses of clusters are inferior to Xray determinations Lensing ha 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.. . C. luster . L. ensing . A. nd . S. upernova survey with . H. ubble. ACS Parallels. WFC3 Parallels. 6 arcmin. = 2.2 Mpc @ z=0.5. Footprints of HST Cameras: . ACS FOV in yellow, . WFC3/IR FOV in red, . An Innovative. Multi-cycle Hubble Treasury Program to . Study the Dark Universe. Marc . Postman. Space Telescope Science . Institute. Science with HST III, Venice, Italy. October 2010. MACS 2129-0741 z = 0.57 HST/ACS image (. 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). Gaussianities. Antony Lewis. http://cosmologist.info/. Lewis . arXiv:1107.5431. Hanson . & Lewis . arXiv:0908.0963. Lewis, Challinor & Hanson . arXiv:1101.2234. Pearson, Lewis & Regan . arXiv:1201.1010. Boot Camp. Robert Nemiroff. Michigan Tech . Abstract. What is gravitational lensing, what has it told us about the universe, and what more can it tell us about the universe? Lenses such as black holes, stars, galaxies, clusters of galaxies, and the universe as a whole will be covered. Concepts such as Einstein rings, photon spheres, image pair creation events, and shear will be defined and briefly discussed. The intersection of gravitational lensing with current research frontiers will be reviewed including how microlensing is being used to search for extra-solar planets, how radio telescopes are being used to probe galaxy-center black holes, and how weak lensing is being used to probe galaxy evolution in the early universe. Possible lensing signals in continuing and upcoming missions such as Planck, DES, LSST, Euclid, and WFIRST will be reviewed. Relevant parts of the lecturer's own research will also be briefly mentioned. . 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). 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. 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. An Innovative. Multi-cycle Hubble Treasury Program to . Study the Dark Universe. Marc . Postman. Space Telescope Science . Institute. Science with HST III, Venice, Italy. October 2010. MACS 2129-0741 z = 0.57 HST/ACS image (. 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. Patrick L. Kelly et al. 2014 arXiv:1411.6009 . submitted to Nature. Summarised. . by Poonam Chandra. February 18, 2015. Poonam Chandra. 1. Punch line. Discovery of the . first multiply-imaged . gravitationally-lensed supernova..