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Vestnik YuUrGU. Ser. Mat. Model. Progr., 2019, Volume 12, Issue 2, Pages 123–135 (Mi vyuru493)  

Programming & Computer Software

Numerical modelling of the dynamics of the galactic halos in the colliding galaxies

S. S. Khrapova, A. V. Khoperskova, V. I. Korchaginb

a Volgograd State University, Volgograd, Russian Federation
b Southern Federal University, Rostov-on-Don, Russian Federation

Abstract: Based on parallel three-dimensional simulation of N-body and gas self-consistent dynamics, we study the behavior of hot coronal gas in the colliding galaxies with “live” dark matter halos. We model a few scenarios of the galactic collisions including “bull-eye” and non-central ones, and use different values of the initial velocities of the colliding galaxies. Taking into account the self-gravity, we demonstrate that the collision of gaseous and stellar components does not lead to the formation of a gaseous “protogalaxy” observed in some numerical simulations. Also, we show that about sixty percent of hot halo gas is expelled into intergalactic space during the collision. Numerical simulations show that a considerable amount of gas (up to 70% for a bull-eye collisions) exchanges between two colliding galaxies.

Keywords: Multi-GPU, OpenMP-CUDA, GPU-Direct, NVIDIA TESLA, N-body, SPH, colliding galaxies.

Funding Agency Grant Number
Ministry of Education and Science of the Russian Federation 2.852.2017/4.6
RFMEFI62117X0011
Russian Science Foundation 18-12-00213
AVK and SSK acknowledges the Ministry of Science and Higher Education of the Russian Federation (government task, project No. 2.852.2017/4.6) for the financial support of the development of the software and numerical simulations. VIK thanks Russian Science Foundation (grant No. 18-12-00213) for the financial support of the development of models of galaxies and the analysis of the results of numerical simulations. Authors thank T. Girard for valuable comments. The research is carried out using the equipment of the shared research facilities of HPC computing resources at Lomonosov Moscow State University supported by project RFMEFI62117X0011.


DOI: https://doi.org/10.14529/mmp190210

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UDC: 519.6+524.7
MSC: 34N05, 37M05, 68U20
Received: 14.02.2019
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Citation: S. S. Khrapov, A. V. Khoperskov, V. I. Korchagin, “Numerical modelling of the dynamics of the galactic halos in the colliding galaxies”, Vestnik YuUrGU. Ser. Mat. Model. Progr., 12:2 (2019), 123–135

Citation in format AMSBIB
\Bibitem{KhrKhoKor19}
\by S.~S.~Khrapov, A.~V.~Khoperskov, V.~I.~Korchagin
\paper Numerical modelling of the dynamics of the galactic halos in the colliding galaxies
\jour Vestnik YuUrGU. Ser. Mat. Model. Progr.
\yr 2019
\vol 12
\issue 2
\pages 123--135
\mathnet{http://mi.mathnet.ru/vyuru493}
\crossref{https://doi.org/10.14529/mmp190210}
\elib{https://elibrary.ru/item.asp?id=38225242}


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