PDF-The Cosmological Redshift: Changing the light from a galaxy

45 We have all heard the sound of an ambulance siren as it passesby The highpitch as it approaches is by This is an example of the Doppler many astronomical settings as well sound waves it146. The Cosmic Time Machine. Astronomical telescopes can’t help viewing the past.. . Distance and time are always mixed in astronomical observations.. The finite speed of light means that we always see things after they have happened–a delay of 8 minutes for the Sun and about 12 billion years for the most distant galaxies we can observe. In other words,. vs. Creation. Christopher W. Ashcraft M.S., M.Ed.. Big Bang vs. Creation. Origin of Stars. Solar System: Evidence of Design. Age of the Cosmos. Are we being told all the evidence or just selected information to support a particular idea?. 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…. Redshift. in Clusters of Galaxies. Marton Trencseni. Eotvos. University, Budapest. Gravitational . Redshift. Photon escapes from gravitational well. G. ains potential energy. Speed cannot decrease =). Leonidas . Moustakas. , JPL/Caltech. CLASH London 2013. leonidas@jpl.nasa.gov. 1. © 2013 California Institute of Technology. Government sponsorship acknowledged. Two goals in the high-redshift game. Thomas Krühler (DARK). Thanks to J. . Fynbo. , D. . Malesani. , J. . Hjorth. ,. J. Greiner, D. A. . Kann. , D. . Perley. , N. . Tanvir. , . S. . Klose. and many others. Very High Energy Phenomena in the . Paul Hewett (. IoA. , Cambridge). James Allen (U. Sydney). Outline. Motivation: . quasar . clustering, . host-galaxy and local quasar environment, relation . to Ly. α. -absorbers and the inter-galactic medium, outflow properties of quasars themselves. Lesson Objectives. To understand toast Doppler principle as responsible for redshift and . blueshift. .. To perform simple calculations involving known and observed wavelengths of spectral lines and . Past, Present and Future. HI Pathfinder Workshop. Perth, February 2-4, 2011. Philip Lah. HI . Stacking. C. oadding the . HI 21-cm emission . from distant galaxies . using the galaxies’ known . optical positions. Originally discovered by the Austrian mathematician and physicist, Christian Doppler (1803-53), this change in pitch results from a . shift. in the frequency of the sound waves. As the ambulance approaches, the sound waves from its siren are compressed towards the observer. . 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. Lecture 1. Josh . Frieman. I Jayme . Tiomno. School of Cosmology, Rio de Janeiro, Brazil. July 2010. Hoje. I. Cosmology Review. II. Observables: Age, Distances. III. Type . Ia. Supernovae as . Standardizable. homgeneity. of the universe.. 2. understand how Hubble’s law is used to map the universe, and look back in time.. 3. Know each of the major predictions of the Big Bang theory, and corresponding confirmations by observation.. in . simulations. of . galaxy. . formation. G. Murante – INAF . OATo. P. Monaco – . Univ. . . Ts. M. Calabrese – SISSA . Ts. G. De Lucia - INAF . OATs. S. . Borgani. – . Univ. . . Ts. K. .