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Noise, friction and the radial-orbit instability in anisotropic stellar systems: stochastic N–body simulations

Published online by Cambridge University Press:  30 May 2022

Pierfrancesco Di Cintio Open the ORCID record for Pierfrancesco Di Cintio [Opens in a new window]  and
Lapo Casetti
Pierfrancesco Di Cintio
Affiliation:
Enrico Fermi Research Center (CREF), Via Panisperna 89A, I-00184, Rome, Italy email: [email protected] INFN, Sezione di Firenze, via G. Sansone 1, I-50019, Sesto Fiorentino (FI), Italy Dipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, I-50019, Sesto Fiorentino (FI), Italy
Lapo Casetti
Affiliation:
INFN, Sezione di Firenze, via G. Sansone 1, I-50019, Sesto Fiorentino (FI), Italy Dipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, I-50019, Sesto Fiorentino (FI), Italy INAF-Osservatorio astrofisico di Arcetri, largo E. Fermi 5, I-50125, Firenze, Italy
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Abstract

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By means of numerical simulations we study the radial-orbit instability in anisotropic self-gravitating N–body systems under the effect of noise. We find that the presence of additive or multiplicative noise has a different effect on the onset of the instability, depending on the initial value of the orbital anisotropy.

Keywords

Stellar dynamicsGalaxies: kinematics and dynamicsMethods: n-body simulationsDiffusion
Type
Research Article
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S364: Multi-scale (Time and Mass) Dynamics of Space Objects (Oct 2021) , October 2019 , pp. 152 - 157
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), 2022. Published by Cambridge University Press on behalf of International Astronomical Union

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