Weakly non-Gaussian formulas of cosmological random fields

Abstract: In cosmology, various kinds of random fields play important roles, including 3D distributions of galaxies and other astronomical objects, 2D distributions of cosmic microwave background radiations and weak lensing fields, etc. The features of non-Gaussianity in these fields contain a lot of cosmological information. In this talk, I will present a method to analytically describe the effects of weak non-Gaussianity in field statistics, such as the peak abundance, peak correlations, Minkowski functionals, etc.

other computer sciencespace physics and aeronomydata analysis, statistics and probability

Audience: researchers in the topic

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IAU-IAA Astrostats & Astroinfo seminar(archived version by January 2023)

Series comments: This is an archived version of the seminar with information about talks by January 2023.

Use the following link for the new version: sites.google.com/view/iau-iaaseminar-new

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Joint IAU-IAA Astrostats & Astroinfo seminar series focuses on statistical and computational methodological challenges arising in the various fields of astronomy. It discusses existing and new advanced approaches in statistical analysis and data mining of astronomical data.

In the 21st century, increasing resources are devoted to wide-field astronomical surveys, multi-dimensional data, and high-throughput instruments that produce peta-scale datasets and giga-scale samples. In addition to the growing tasks of data storage and management, new statistical tools have been developed or specified for astronomical problems. Astronomical insights require characterizing structure in images, spectra or time series by using non-linear, often high-dimensional models.

This international online seminar series is an initiative of the International Astrostatistics Association and the IAU Astroinformatics and Astrostatistics Commission.

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