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Multiparticle collision simulations of dense stellar systems and plasmas

Published online by Cambridge University Press:  20 January 2023

P. Di Cintio Open the ORCID record for P. Di Cintio [Opens in a new window] ,
M. Pasquato ,
L. Barbieri ,
H. Bufferand ,
L. Casetti ,
G. Ciraolo ,
U. N. di Carlo ,
P. Ghendrih ,
J. P. Gunn  and
S. Gupta
...Show all authors
P. Di Cintio
Affiliation:
Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi via Madonna del piano 10, I-50019 Sesto Fiorentino, Italy email: [email protected] Dept. of Physics & Astronomy, University of Florence, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy INFN, Sezione di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy
M. Pasquato
Affiliation:
Dept. of Physics & Astronomy Galileo Galilei, University of Padova, Vicolo dell’Osservatorio 3, I-35122, Padova, Italy Département de Physique, Université de Montréal, Montreal, Quebec H3T 1J4, Canada
L. Barbieri
Affiliation:
Dept. of Physics & Astronomy, University of Florence, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy INFN, Sezione di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy INAF, Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi, 5, I-50125 Firenze, Italy
H. Bufferand
Affiliation:
IRFM, CEA, F-13108 St Paul Lez Durance, France
L. Casetti
Affiliation:
Dept. of Physics & Astronomy, University of Florence, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy INFN, Sezione di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy INAF, Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi, 5, I-50125 Firenze, Italy
G. Ciraolo
Affiliation:
IRFM, CEA, F-13108 St Paul Lez Durance, France
U. N. di Carlo
Affiliation:
McWilliams Center for Cosmology and Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA
P. Ghendrih
Affiliation:
IRFM, CEA, F-13108 St Paul Lez Durance, France
J. P. Gunn
Affiliation:
IRFM, CEA, F-13108 St Paul Lez Durance, France
S. Gupta
Affiliation:
Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba Mumbai 400005, India
H. Kim
Affiliation:
Department of Astronomy & Center for Galaxy Evolution Research, Yonsei University, Seoul 120-749, Republic of Korea
S. Lepri
Affiliation:
Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi via Madonna del piano 10, I-50019 Sesto Fiorentino, Italy email: [email protected] INFN, Sezione di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy
R. Livi
Affiliation:
Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi via Madonna del piano 10, I-50019 Sesto Fiorentino, Italy email: [email protected] Dept. of Physics & Astronomy, University of Florence, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy INFN, Sezione di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy
A. Simon-Petit
Affiliation:
Dept. of Physics & Astronomy, University of Florence, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy INFN, Sezione di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy
A. A. Trani
Affiliation:
Department of Earth Science and Astronomy, College of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan Okinawa Institute of Science and Technology, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
S.-J. Yoon
Affiliation:
Department of Astronomy & Center for Galaxy Evolution Research, Yonsei University, Seoul 120-749, Republic of Korea
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Abstract

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We summarize a series of numerical experiments of collisional dynamics in dense stellar systems such as globular clusters (GCs) and in weakly collisional plasmas using a novel simulation technique, the so-calledMulti-particle collision (MPC) method, alternative to Fokker-Planck and Monte Carlo approaches. MPC is related to particle-mesh approaches for the computation of self consistent long-range fields, ensuring that simulation time scales with N log N in the number of particles, as opposed to N2 for direct N-body. The collisional relaxation effects are modelled by computing particle interactions based on a collision operator approach that ensures rigorous conservation of energy and momenta and depends only on particles velocities and cell-based integrated quantities.

Keywords

methods: n-body simulationsmethods: numericalgravitationplasmas
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S362: The Predictive Power of Computational Astrophysics as a Discovery Tool , June 2020 , pp. 134 - 140
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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