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CosPA 2013

Nov 12 – 15, 2013
Pagoda Hotel & Restaurant
Pacific/Honolulu timezone

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Session

Cosmology III

Nov 14, 2013, 10:40 AM
C'est Si Bon (Pagoda Hotel & Restaurant)

C'est Si Bon

Pagoda Hotel & Restaurant

1525 Rycroft St. Honolulu, HI 96814

Description

Chair: Jun'ichi Yokoyama (RESCEU, University of Tokyo)

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  1. 56. Gravitational Redshifts in Clusters of Galaxies
    Dr Nicholas Kaiser (Institute for Astronomy, U. Hawaii)
    11/14/13, 10:40 AM
    Cosmology
    oral
    Wojtak, Hansen and Hjorth (Nature, 2011) have measured the long-predicted gravitational redshifts in galaxy clusters using Sloan Digital Sky Survey data. The effect is very small, corresponding to a velocity shift of only ~10 km/s in clusters with internal random motions ~600 km/s) but is in good agreement with general relativity predictions and possibly in conflict with some alternative...
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  2. 11. Detecting the first stars and black holes with 21-cm cosmology
    Prof. Rennan Barkana (Tel Aviv University)
    11/14/13, 11:05 AM
    Cosmology
    oral
    A major frontier area in cosmology is cosmic reionization, the key epoch in which the intergalactic hydrogen throughout the universe was reionized after having recombined in the early universe. Despite uncertainties about the sources of radiation at early times, it is widely assumed that prior to reionization the cosmic gas must have been pre-heated to well over the temperature of the...
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  3. 6. Reconstructing the Primordial Power Spectrum With Planck
    Dr Christopher Gauthier (LaCosPa, National Taiwan University)
    11/14/13, 11:30 AM
    Cosmology
    oral
    Four years ago the Planck satellite was launched with the objective of furthering our understanding of the history and structure of the universe by making detailed measurements of the Cosmic Microwave Background. In March, the data and preliminary cosmological results from Planck were finally made public. The data collected by Planck is the most precise and comprehensive yet obtained, the full...
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  4. 40. The spectral index may be blue: superhorizon coupling to subhorizon modes.
    Joseph Bramante (University of Notre Dame)
    11/14/13, 11:55 AM
    Cosmology
    oral
    In a universe much larger than our current Hubble volume, locally unobservable long wavelength modes can induce a scale-dependence in the power spectrum of typical subvolumes, so that the observed spectral index varies at a cosmologically significant level. This talk will explain how super-Hubble dynamics can impact sub-Hubble measurements and survey the features of inflation models that would...
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