PPT-Cosmology : Cosmic Microwave Background

amp Large scale structure Tarun Souradeep IUCAA Cosmology IUCAA VSP program May 1822 2012 Lec 2 Cosmic Content Perturbed Universe Simple yet an exotic. durrerphysicsunigech Dpartement de Physique Thorique Universit de Genve Q uai E Anserment 24 CH1211 Genve Switzerland Received Accepted in 64257nal form Abstract The physics of the origin and evolution of CMB anisotropies i s described followed by a Significance . of a dark night . sky. The Universe . is expanding. The . Big Bang. initiated the expanding Universe. Microwave radiation . evidence . of the . Big Bang. The Universe was initially hot & opaque. & Large scale structure. Tarun Souradeep. I.U.C.A.A. .. Cosmology . IUCAA . VSP program. (. May 18-22, . 2012). Lec. . 2:. Cosmic Content. Perturbed Universe . Simple. … yet, an . exotic. Bruce Partridge. Haverford College. bpartrid@haverford.edu. Thanks…. Start with thanks:. To funding agencies for supporting CMB research. To ICISE. To the organizers for giving me a chance to relive the early days of CMB science. & Large scale structure. Tarun Souradeep. I.U.C.A.A. .. Cosmology . IUCAA . VSP program. (. May 18-22, . 2012). Lec. . . 4:. Current frontiers. Mildly Perturbed universe at z=1100. Present universe at z=0. Exposing the Big Bang . as Philosophy not Science. Dr John Hartnett. 1929 - astronomer discovered . - ‘nebulae’ are galaxies. - redshifts of galaxies. - the Hubble Law . - interpreted to mean that . Evidence for the Big Bang Theory. Learning Goal:. By the end of this lesson, you will be able to explain three pieces of evidence for the Big Bang Theory: . Cosmic Microwave Background Radiation. Redshift of galaxies. 2nd Millennium BCE. BC. . . Mesopotamian cosmology . has a flat,circular Earth enclosed in a cosmic Ocean. 12. th. century BCE. C. . Rigveda. has some cosmological hymns, most notably the Nasadiya Sukta. If the universe was 1 year old . . .. Science/religion – either/or?. How do we predict the conditions of the early universe?. What are the different eras in the early universe?. What key lines of evidence support the Big Bang model?. Older ….. larger … colder ….less energetic. now. Big Bang. Prediction of Cosmic Microwave Background radiation. λ. emitted. = 1 . μ. m. T. emitted. = 3000 K. R. observed . = 1000. R. emitted. Polarization. B-. modes. . polarization. of the CMB: . produced. by . dark . matter. . structures. (. lensing. ) . crossed. by CMB . photons. Produced. by the . inflation. . process. in the . Florida State University. YSP. Topics. Big . Bang Cosmology. The Accelerating Universe. Summary. Big . bang . cosmology. 3. In . the distant past the visible Universe was much smaller than it is today and therefore much, much hotter.. as Philosophy not Science. Dr John Hartnett. 1929 - astronomer discovered . - ‘nebulae’ are galaxies. - redshifts of galaxies. - the Hubble Law . - interpreted to mean that . the Universe is expanding. Atınç Çağan Şengül. A little historical background. The universe of 100 years ago. The Great War. General Theory of Relativity is just published. Milky Way was not “a galaxy” it was “the galaxy”.