PIRSA:C15035 - Cosmic Flows (and other novelties on Large Scales)PODCAST Subscribe to podcast

Cosmic Flows (and other novelties on Large Scales)


Collection URL: http://pirsa.org/C15035

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PIRSA:15080008  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Clustering Redshifts: A New Era of Distance Measurement
Speaker(s): Mubdi Rahman
Abstract: The measurement of distance has long been a fundamental challenge in astrophysics. We have developed a method of inferring distances to astrophysical sources using spatial cross-correlations with galaxies of known redshift. These “clustering redshifts” are robust to problems plaguing other dist... read more
Date: 11/08/2015 - 11:20 am

PIRSA:15080004  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Speaker(s): Matias Zaldarriaga
Abstract: TBA
Date: 11/08/2015 - 2:00 pm

PIRSA:15080010  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Cosmological measurement of neutrino masses from relative velocities
Speaker(s): Hong-Ming Zhu
Abstract: Present day streaming motions of neutrinos relative to dark matter and baryons are several hundred km/s, comparable with their thermal velocity dispersion. This results in a unique dipole anisotropic distortion of the matter-neutrino cross power spectrum, which is observable through the dipole disto... read more
Date: 11/08/2015 - 2:40 pm

PIRSA:15080011  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Biasing in the Lyman-alpha forest
Speaker(s): Anze Slosar
Abstract: I'll present a series of numerical experiments to test simple analytical predictions for large-scale Lyman-alpha forest bias parameters. Despite relying on second-order SPT, some of the predictions are surprisingly accurate, especially if thermal broadening is not taken into account. I'll also discu... read more
Date: 11/08/2015 - 3:50 pm

PIRSA:15080021  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Large-Scale Flows During Reionization and their Detectability via Cross-correlations
Speaker(s): Marcelo Alvarez
Abstract: New results on the observational signatures of large-scale flows during reionization, using new simulations and analytical methods, will be presented. A preliminary analysis will be described, indicating that cross-correlation of diffuse radiation with tracers of the large scale matter fluctuations ... read more
Date: 11/08/2015 - 4:30 pm

PIRSA:15080001  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Cosmic Flows with the Baryon Oscillation Spectroscopic Survey (BOSS)
Speaker(s): Florian Beutler
Abstract: I will present results from the SDSS-III BOSS-DR11 analysis. In this talk I will focus on the analysis of the power spectrum multipoles, which allows to constrain the growth of structure through redshift-space distortions. Such measurements can be used to test GR and measure the sum of the neutrino ... read more
Date: 12/08/2015 - 9:30 am

PIRSA:15080002  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Probing Dark Energy with the Canadian Hydrogen Intensity Mapping Experiment (CHIME)
Speaker(s): Richard Shaw
Abstract: CHIME will use the 21cm emission line of neutral hydrogen to map large-scale structure between redshifts of 0.8 and 2.5. By measuring BAO we will place constraints on the dark energy equation of state as it begins to dominate the expansion of the Universe, particularly at redshifts poorly probed ... read more
Date: 12/08/2015 - 10:40 am

PIRSA:15080003  ( MP4 Medium Res , MP3 , PDF ) Which Format?
21cm fluctuations in the dark ages and cosmic heat flows
Speaker(s): Yacine Ali-Haimoud
Abstract: The spin-flip transition in neutral hydrogen may be used to probe large-scale structure at high redshifts, before the first luminous objects formed. The huge number of modes potentially accessible make this a very promising avenue. I will discuss several key unknowns that could be measured with high... read more
Date: 12/08/2015 - 11:20 am

PIRSA:15080019  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The Effective Field Theory of Large Scale Structures
Speaker(s): Leonardo Senatore
Abstract: After the completion of the Planck satellite, the next most important experiments in cosmology will be about mapping the Large Scale Structures of the Universe. In order to continue to make progress in our understanding of the early universe, it is essential to develop a precise understanding of thi... read more
Date: 12/08/2015 - 2:00 pm

PIRSA:15080118  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Date: 12/08/2015 - 3:30 pm

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