A novel algorithm for identifying gravitationally bound cosmological structures
Surajit Paul, and Prateek Gupta
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The cosmic-web structure of the Universe is best revealed through cosmological large-volume simulations and large-scale galaxy redshift surveys. Appropriate identification and quantification of these structures are important to the understanding of the evolution of the Universe and test the cosmological models. However, the currently available algorithms are not designed suitably to capture the actual geometry and real gravitationally bound structures. In this work, we present our proposed algorithm called the Measure of Increased Tie with gravity Order (MITRO), which is fundamentally new that successfully captures the physically relevant over-densities with real unstructured geometries of the objects simultaneously. With a few examples, we also demonstrate the unique applicability of the code, both in large-volume cosmological simulations as well as in galaxy redshift surveys which could not be achieved so far by other available methods.
Publications:
P. Gupta and S Paul 2023 (Physical Review D 108 (10), 103509):