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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:C10010 - Fundamental Physics and Large Scale Structure (2010)PODCAST Subscribe to podcast

Fundamental Physics and Large Scale Structure

Organizer(s):

Collection URL: http://pirsa.org/C10010

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Fingerprints of structure formation in the microwave background
Speaker(s): Gil Holder
Abstract: Non-linear structures in the universe leave characteristic imprints in the cosmic microwave background. These include Compton scattering (Sunyaev-Zeldovich effects) and gravitational lensing. The South Pole Telescope now has a catalog of massive galaxy clusters that were discovered this way, along w... read more
Date: 28/04/2010 - 9:30 am

Optical Surveys of Large-Scale Structure
Speaker(s): Jeffrey Newman
Abstract: TBA
Date: 28/04/2010 - 10:15 am

Testing gravity at cosmological scales: from linear to nonlinear regimes
Speaker(s): Pengjie Zhang
Abstract: Observations are opening new windows to test general relativity at cosmological scales. In this talk, I will discuss how gravity determines the expansion and structure formation of the universe, what smoking guns of gravity in the cosmos we are expecting, what difficulties we are facing to perform u... read more
Date: 28/04/2010 - 11:45 am

Cosmic Acceleration: Dark Energy vs Modified Gravity
Speaker(s): Wayne Hu
Abstract: I will discuss distinctions between dark energy and modified gravity explanations of cosmic acceleration from the horizon scale to the deeply non-linear regime using the modified action f(R) and braneworld DGP models as worked toy examples.
Date: 28/04/2010 - 2:00 pm
Series: Colloquium

TBA
Speaker(s): Roman Scoccimarro
Abstract: TBA
Date: 28/04/2010 - 4:00 pm

TBA
Speaker(s): Anze Slosar
Abstract: TBA
Date: 28/04/2010 - 4:45 pm

Recent advances and future challenges for using galaxy clusters in cosmology
Speaker(s): Alexey Vikhlinin
Abstract: X-ray surveys and deep Chandra observations recently provided ~10% accurate measurements of the total mass in nearly 100 galaxy clusters at z=0-0.9. These data clearly show the effect of Dark Energy on slow-down of the structure growth at z<1. THe combination of the structure growth measureme... read more
Date: 29/04/2010 - 9:00 am

Templates for the SZ Angular Power Spectrum
Speaker(s): Hy Trac
Abstract: The Atacama Cosmology Telescope (ACT) has recently measured the CMB angular power spectrum from maps with arcminute resolution at 148 GHz. By fitting to a template for the SZ angular power spectrum, we constrain the model's amplitude A_SZ < 1.63 (95% confidence level) and the amplitude of mat... read more
Date: 29/04/2010 - 9:45 am

Bullet Cluster: A Challenge to Lambda-CDM Cosmology
Speaker(s): Eiichiro Komatsu
Abstract: We show that the existence of the bullet cluster, 1E0657-56, is incompatible with the prediction of the standard Lambda CDM cosmology. The probability of finding the large infall velocity (3000 km/s) necessary for explaining the X-ray and weak lensing data of 1E0657-56 is between 3.3x10^{-11} ... read more
Date: 29/04/2010 - 11:00 am

Falsifying Paradigms for Cosmic Acceleration
Speaker(s): Dragan Huterer
Abstract: How can we rule out whole classes of dark energy models? And what quantities, at what redshift, and with what accuracy, should be measured in order to rule out these classes of models? I present answers to these questions by discussing an approach that utilizes the principal component parametrizatio... read more
Date: 29/04/2010 - 11:45 am

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