English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

GraviDy: a modular, GPU-based, direct-summation N-body code

MPS-Authors

Maureira-Fredes,  Cristián
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons20654

Amaro-Seoane,  Pau
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

Locator
There are no locators available
Fulltext (public)

Pau_IAU.pdf
(Any fulltext), 56KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Maureira-Fredes, C., & Amaro-Seoane, P. (2014). GraviDy: a modular, GPU-based, direct-summation N-body code. Proceedings of the International Astronomical Union, 10: S312, pp. 252-253. doi: http://dx.doi.org/10.1017/S1743921315007954.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002A-3880-9
Abstract
The direct-summation of N gravitational forces is a complex problem for which there is no analytical solution. Dense stellar systems such as galactic nuclei and stellar clusters are the loci of different interesting problems. In this work we present a new GPU, direct-summation N-body integrator written from scratch and based on the Hermite scheme. The first release of the code consists of the Hermite integrator for a system of N bodies with softening. We find an acceleration factor of about ≈ 90 of the GPU version in a single node as compared to the Serial-Single-CPU one. We additionally investigate the impact of using softening in the dynamics of a dense cluster. We study how it affects the two body relaxation, as compared with another code, NBODY6, which uses KS regularization, so as to understand the role of softening in the evolution of the system. This initial release is the first step towards more and more realistic scenarios, starting for a proper treatment for binary evolution, close encounters and the role of a massive black hole.