Format results
-
Fingerprints of structure formation in the microwave background
Gilbert Holder - University of Illinois Urbana-Champaign
-
Optical Surveys of Large-Scale Structure
Jeffrey Newman - University of Pittsburgh
-
Testing gravity at cosmological scales: from linear to nonlinear regimes
Pengjie Zhang - Shanghai Jiao Tong University
-
Cosmic Acceleration: Dark Energy vs Modified Gravity
Wayne Hu - University of Chicago
-
-
-
-
Templates for the SZ Angular Power Spectrum
Hy Trac - Harvard University
-
Bullet Cluster: A Challenge to Lambda-CDM Cosmology
Eiichiro Komatsu - Max-Planck-Institut für Astrophysik (MPA), Garching
-
Falsifying Paradigms for Cosmic Acceleration
Dragan Huterer - University of Michigan–Ann Arbor
-
The Galileon as a local modification of gravity
Alberto Nicolis - Columbia University
-
Galilean Genesis: an alternative to inflation
Paolo Creminelli - The Abdus Salam International Centre for Theoretical Physics (ICTP)
-
Fingerprints of structure formation in the microwave background
Gilbert Holder - University of Illinois Urbana-Champaign
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… -
-
Testing gravity at cosmological scales: from linear to nonlinear regimes
Pengjie Zhang - Shanghai Jiao Tong University
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… -
Cosmic Acceleration: Dark Energy vs Modified Gravity
Wayne Hu - University of Chicago
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. -
-
-
Recent advances and future challenges for using galaxy clusters in cosmology
Alexey Vikhlinin - Harvard University
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 measurements… -
Templates for the SZ Angular Power Spectrum
Hy Trac - Harvard University
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 matter… -
Bullet Cluster: A Challenge to Lambda-CDM Cosmology
Eiichiro Komatsu - Max-Planck-Institut für Astrophysik (MPA), Garching
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} and 3… -
Falsifying Paradigms for Cosmic Acceleration
Dragan Huterer - University of Michigan–Ann Arbor
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… -
-
Galilean Genesis: an alternative to inflation
Paolo Creminelli - The Abdus Salam International Centre for Theoretical Physics (ICTP)
I will discuss an alternative to inflation based on a Galileon field. The model starts in a (contracting or expanding) quasi Minkowski phase and all the energy of the Universe in generated suddenly in a sort of Genesis associated with a strong violation of the Null Energy Condition. The symmetries…