Abstract
We use Newtonian formalism to motivate the form of Friedmann equations that describe the expansion of the universe in the standard cosmological model. We use the same formalism to study the evolution of density perturbations in the universe. We show that a simple model like spherical collapse can be used to estimate the characteristics of halos of galaxies and clusters of galaxies.
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(left) Jasjeet Bagla works at IISER Mohali. His research is mainly in the area of cosmology.
(right) Pritpal Kaur Sandhu works as a research scholar at IIT Indore. Her current research is on clusters of galaxies.
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Bagla, J.S., Sandhu, P.K. Gravitational collapse and structure formation in an expanding universe. Reson 20, 803–815 (2015). https://doi.org/10.1007/s12045-015-0239-7
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DOI: https://doi.org/10.1007/s12045-015-0239-7