Bulletin of the American Physical Society
2006 APS April Meeting
Saturday–Tuesday, April 22–25, 2006; Dallas, TX
Session J4: Precision Cosmology |
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Sponsoring Units: DAP GGR Chair: John Beacom, Ohio State University Room: Hyatt Regency Dallas Marsalis A |
Sunday, April 23, 2006 1:15PM - 1:51PM |
J4.00001: Recent Results from WMAP Invited Speaker: The Wilkinson Microwave Anisotropy Probe (WMAP) has been measuring both the temperature and polarization anisotropies in the CMB for over four years. The maps from WMAP are one of the key elements in the foundation of the standard model of cosmology. In this talk we review the results from the second WMAP release with an emphasis on the new science we have learned. [Preview Abstract] |
Sunday, April 23, 2006 1:51PM - 2:27PM |
J4.00002: Probing Dark Energy with Galaxy Clusters Invited Speaker: The abundance and spatial clustering of galaxy clusters provides a promising probe of the nature of the dark energy, sensitive to both geometry and the rate of growth of large-scale structure. This talk will provide an overview of future surveys aimed in part at exploiting this technique, discuss the main systematic effects which potentially limit its precision, and describe methods for controlling and mitigating those uncertainties. A hallmark of future cluster surveys will be the confluence of multiple methods for observing clusters, including optical, weak lensing, Sunyaev-Zel'dovich, X-ray, and dynamical measures of cluster properties. [Preview Abstract] |
Sunday, April 23, 2006 2:27PM - 3:03PM |
J4.00003: Dark Energy and Cosmic Sound Invited Speaker: Daniel Eisenstein I present galaxy clustering results from the Sloan Digital Sky Survey that reveal the signature of acoustic oscillations of the photon-baryon fluid in the first million years of the Universe. The scale of this feature can be computed and hence the detection in the galaxy clustering serves as a standard ruler, giving a geometric distance to a redshift of 0.35. I will discuss the implications of this measurement for the composition of the universe, including dark energy and spatial curvature. I will close with a discussion of the prospects for future redshift surveys to use the acoustic peak to map the expansion history of the universe. [Preview Abstract] |
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