Abstract
The standard \(\Lambda \)-cold dark matter (\(\Lambda \)CDM) cosmological model suggests that the universe contains an abundance of dark energy and CDM. The fluctuations in the initial distribution of dark matter collapse to form dense gravitationally bound dark matter halos which evolve through repeated mergers of galaxies. In this work, open simulation source code GADGET-2 based on smooth particle hydrodynamics approach is used to study the phenomenon of two merging galaxies consisting of dark matter and gas. Also, an analysis of dark matter simulation is done for the halo mass function. By ROCKSTAR code and compiling it with the same cosmological parameters of GADGET-2 and N-GenIC, the simulation results with the ‘Tinker mass function’ are compared.
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Acknowledgements
The author express his gratitude to C-DAC Pune for providing the server ‘Paramshakti’ to run the simulations. Also would like to take this opportunity to express my profound gratitude to Mr. Manodeep Sinha (Research Assistant Professor, Department of Physics and Astronomy, Vanderbilt University) for his exemplary guidance, monitoring and constant encouragement throughout the project via e-mail. Also, her sincere gratitude to my project guide, Dr Ram Prasad Prajapati for his endless support and counsel throughout her M.Sc. and thesis work. Finally, she is grateful to Volker Springel for developing GADGET-2 and making it available as a public source.
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This article is part of the Special Issue on “Waves, Instabilities and Structure Formation in Plasmas”.
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Tulasi, K. N-body simulation of galaxy merger containing dark matter using GADGET-2. J Astrophys Astron 43, 69 (2022). https://doi.org/10.1007/s12036-022-09859-y
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DOI: https://doi.org/10.1007/s12036-022-09859-y