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International Year of Astronomy 2009 (IYA)

International Year of Astronomy 2009 (IYA)

International Year of Astronomy 2009 (IYA). World-wide celebration of astronomy, its contribution to society and culture 400 th anniversary of first use of astronomical telescope by Galileo. NASA IYA objectives include: strengthen interest in science and science education

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841 views • 62 slides
CMB: Sound Waves in the Early Universe

CMB: Sound Waves in the Early Universe

Before recombination: Universe is ionized. Photons provide enormous pressure and restoring force. Photon-baryon perturbations oscillate as acoustic waves. After recombination: Universe is neutral. Photons can travel freely past the baryons.

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883 views • 57 slides
T he dark universe

T he dark universe

T he dark universe. P. Binétruy AstroParticule et Cosmologie, Paris. Second Sino-French Workshop, Beijing, 28 August 2006. The twentieth century legacy. Two very successful theories :. General relativity. A single equation, Einstein’s equation, successfully predicts

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687 views • 55 slides
Dark Energy and Cosmic Sound

Dark Energy and Cosmic Sound

Dark Energy and Cosmic Sound. Daniel Eisenstein (University of Arizona) Michael Blanton, David Hogg, Bob Nichol, Nikhil Padmanabhan, Will Percival, David Schlegel, Roman Scoccimarro, Ryan Scranton, Hee-Jong Seo, Ed Sirko, David Spergel, Max Tegmark, Martin White, Idit Zehavi, and the SDSS.

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268 views • 14 slides
Future observational prospects for dark energy

Future observational prospects for dark energy

Future observational prospects for dark energy. Roberto Trotta Oxford Astrophysics & Royal Astronomical Society. TODAY. w eff ~ -1 § 0.2 for z < 1. Investigating dark energy. The equation of state parameter w(z) = p/  w = -1 w = const  -1 w(z)

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234 views • 10 slides
Niels Bohr Summer Institute 27/8-07

Niels Bohr Summer Institute 27/8-07

Niels Bohr Summer Institute 27/8-07. Beyond Lambda. Edvard Mörtsell Eric Linder: Interpreting dark energy Steen Hannestad: Theoretical problems and perspectives in dark energy Tamara Davis: Where Beyond Lambda meets supernovae. Expansion history of our universe. Cosmological distances

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205 views • 9 slides

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