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Astronomy Colloquium - "Cosmological probe combination for current and future surveys"

Event Type
Department of Astronomy
Kaler Classroon, Astronomy Building
Feb 14, 2023   3:45 pm  
Andrina Nicola, Washington University
Rebecca Bare
Originating Calendar
Astronomy Colloquium Speaker Calendar

Recent progress in observational cosmology and the establishment of ΛCDM have relied on the combination of different cosmological probes.These probes are not independent, since they all measure the same physical fields. The resulting cross-correlations allow for a robust test of the cosmological model through the consistency of different physical tracers and for the identification of systematics. Integrated analyses taking into account both the auto- as well as the cross-correlations between probes therefore present a promising analysis method for both current as well as future data.

In this talk, I will present an integrated analysis of CMB temperature anisotropies, CMB lensing, galaxy clustering and weak lensing. I will then outline possible ways in which to extend joint analyses to optimally benefit from upcoming data, and present results on photometric galaxy clustering in the Hyper Suprime Cam DR1 data as well as a new method to combine thermal Sunyaev-Zel’dovich selected cluster number counts and weak gravitational lensing.

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