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waynehu

Professor, Department of Astronomy and Astrophysics
University of Chicago

Group Contact CV Computing SnapShots
CMB Introduction '96   Intermediate '01   Polarization Intro '01   Cosmic Symphony '04   Polarization Primer '97   Review '02   Power Animations   Lensing   Power Prehistory   Legacy Material '96   PhD Thesis '95 Baryon Acoustic Oscillations Cosmic Shear Clusters
Transfer Function WMAP Likelihood Reionization PPF for CAMB Halo Mass Conversion Cluster Abundance
Cosmology [321] Current Topics [282] Galaxies and Universe [242] Radiative Processes [305] Research Preparation [307] GR Perturbation Theory [408] Advanced CMB [448]

Fast WMAP Likelihood Code and GSR PC Functions

Cora Dvorkin & Wayne Hu

Optimized WMAP7 likelihood code for multicore systems: OMPed loops and bottlenecks removed in the following codes:

Update for the WMAP9 likelihood code

Speed improvements apply to the Gibbs low-l TT likelihood, Master TT/TE/EE likelihood

Supplies an approximate replacement for the low-l polarization pixel likelihood based on a 2 band EE approach

See Dvorkin & Hu (2010) for speed and accuracy tests. After first evaluation typical improvement in speed is ~5xNcore

5 principal component (PC) functions of the GSR source function for determining the PC amplitudes of a model. [eta(Mpc), S1, ... S5]

20 principal component (PC) analysis

References

[1] ''CMB Constraints on Principal Components of the Inflaton Potential,'' Dvorkin & Hu (2010) PRD, 82, 043513, 1007.0215
[2] ''Complete WMAP Constraints on Bandlimited Inflationary Features,'' Dvorkin & Hu (2011) PRD, submitted