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Numerical Model for Simulations of Taffy Galaxies.

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Τίτλος: Numerical Model for Simulations of Taffy Galaxies.
Συγγραφείς: Khoperskov, A. V., Khrapov, S. S., Savin, E. S.
Πηγή: Lobachevskii Journal of Mathematics; Aug2025, Vol. 46 Issue 8, p3698-3709, 12p
Θεματικοί όροι: Computer simulation, Spiral galaxies, Parallel programs (Computer programs), Gravitation, Star formation, Computational fluid dynamics
Περίληψη: A parallel computational model of the dynamics of multi-component (gas+stars+dark matter) colliding galaxies is developed using CUDA technology for hybrid supercomputers with graphics processors (CPU+GPU). The numerical model includes Smooth Particle Hydrodynamics, N-body dynamics, direct algorithm for calculating gravitational forces (Particle–Particle Method), gas heating/cooling processes, star formation and stellar feedback to describe mutual transformations of gas into stars and back. Our parallel CUDA algorithm "SPH N-body" is tested in solving the astrophysical problem of modeling collisions of gas-rich spiral galaxies using the example of Taffy systems. The results of numerical simulations explain some of the observed structures in Taffy galaxies. An analysis of the computational efficiency of our parallel code allowed us to identify the most resource-intensive modules associated with the calculation of gas-dynamic forces in the SPH method when studying head-on galactic collisions with intense energy release and gas clustering in the form of cold molecular clouds. [ABSTRACT FROM AUTHOR]
Copyright of Lobachevskii Journal of Mathematics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Numerical Model for Simulations of Taffy Galaxies.
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  Data: Lobachevskii Journal of Mathematics; Aug2025, Vol. 46 Issue 8, p3698-3709, 12p
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  Data: <searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Spiral+galaxies%22">Spiral galaxies</searchLink><br /><searchLink fieldCode="DE" term="%22Parallel+programs+%28Computer+programs%29%22">Parallel programs (Computer programs)</searchLink><br /><searchLink fieldCode="DE" term="%22Gravitation%22">Gravitation</searchLink><br /><searchLink fieldCode="DE" term="%22Star+formation%22">Star formation</searchLink><br /><searchLink fieldCode="DE" term="%22Computational+fluid+dynamics%22">Computational fluid dynamics</searchLink>
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  Label: Abstract
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  Data: A parallel computational model of the dynamics of multi-component (gas+stars+dark matter) colliding galaxies is developed using CUDA technology for hybrid supercomputers with graphics processors (CPU+GPU). The numerical model includes Smooth Particle Hydrodynamics, N-body dynamics, direct algorithm for calculating gravitational forces (Particle–Particle Method), gas heating/cooling processes, star formation and stellar feedback to describe mutual transformations of gas into stars and back. Our parallel CUDA algorithm "SPH N-body" is tested in solving the astrophysical problem of modeling collisions of gas-rich spiral galaxies using the example of Taffy systems. The results of numerical simulations explain some of the observed structures in Taffy galaxies. An analysis of the computational efficiency of our parallel code allowed us to identify the most resource-intensive modules associated with the calculation of gas-dynamic forces in the SPH method when studying head-on galactic collisions with intense energy release and gas clustering in the form of cold molecular clouds. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of Lobachevskii Journal of Mathematics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Type: general
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      – SubjectFull: Parallel programs (Computer programs)
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              Text: Aug2025
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