Cosmological parameter constraints from large scale structure


  • Stephen Appleby Asia Pacific Center for Theoretical Physics


The distribution of galaxies in the low-redshift Universe provides information on the initial conditions, energy content, and evolution of the Universe from its almost Gaussian primordial state to the highly non-linear cosmic web that we observe today. In this talk, I will introduce a class of statistics that are capable of extracting both Gaussian and non-Gaussian information from the matter distribution. The so-called Minkowski Functionals and their rank-2 tensorial generalisation are a class of topological descriptors of a field which can be used to measure cosmological parameters, test the degree of non-Gaussianity as a function of scale and also provides a mechanism to test statistical isotropy. I will describe these statistics, explain how we extract them from galaxy catalogs and elucidate what they can tell us about the properties of the Universe.

About the Speaker

Stephen Appleby, Asia Pacific Center for Theoretical Physics

Stephen Appleby is a Junior Professor at the Asia Pacific Center for Theoretical Physics (APCTP) in Po-hang, Korea. He obtained his Ph.D. in Astronomy from The University of Manchester, Jodrell Bank Center for Astrophysics, UK. He has previously held postdoctoral research positions at the Korea Institute for Advanced Study (KIAS) in Seoul, Korea, APCTP, Institute for the Early Universe (IEU) in Ewha University, Seoul, Korea, and the Cluster of Excellence in Garching/Munich in Germany.



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Invited Presentations



How to Cite

S Appleby, Cosmological parameter constraints from large scale structure, Proceedings of the Samahang Pisika ng Pilipinas 41, SPP-2023-INV-2D-02 (2023). URL: