Hostname: page-component-848d4c4894-wg55d Total loading time: 0 Render date: 2024-06-04T02:38:32.722Z Has data issue: false hasContentIssue false
  • English
  • Français

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: pierfrancesco.dicintio@unifi.it 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
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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

References

Binney, J.; Tremaine, S. 2008 Galactic dynamics (2nd edition, Princeton University Press)CrossRefGoogle Scholar
Cattolico, R.S.; Capuzzo-Dolcetta, R. 2020 A&SS, 365, 10 Google Scholar
Chandrasekhar, S. 1943, ApJ, 97, 255 CrossRefGoogle Scholar
Chandrasekhar, S. 1949, Reviews of Modern Physics, 21, 383 CrossRefGoogle Scholar
Di Cintio, P.F.; Casetti, L. 2019 MNRAS, 489, 5876 CrossRefGoogle Scholar
Di Cintio, P.F.; Casetti, L. 2020 MNRAS, 494, 1027 CrossRefGoogle Scholar
Di Cintio, P.F.; Ciotti, L.; Nipoti, C. 2017 MNRAS, 468, 2222 CrossRefGoogle Scholar
Di Cintio, P.F.; Ciotti, L.; Nipoti, C. 2020 IAUS Proceedings, 351, 426 Google Scholar
Di Cintio, P.F.; Zocchi, A.; Casetti, L. 2021 In preparation Google Scholar
Eddington, A. 1916, MNRAS 76, 525 CrossRefGoogle Scholar
Gieles, M.; Zocchi, A. 2015, MNRAS 454, 576 CrossRefGoogle Scholar
Habib, S.; Kandrup, H.E.; Mahon, M.E. 1997 ApJ 64, 56209 Google Scholar
Kandrup, H. E. 1980, Phys. Rep., 63, 1 CrossRefGoogle Scholar
Kandrup, H.E.; Sideris, I.V. 2001 Phys. Rev. E 64, 56209 Google Scholar
Mannella, R. 2004, Phys. Rev. E, 69, 041107 CrossRefGoogle Scholar
Marechal, L; Perez, J 2010 MNRAS 405, 2785 Google Scholar
Merritt, D. 1985, AJ, 90, 1027 CrossRefGoogle Scholar
Osipkov, L.P. 1985, Sov. Astr. Letters, 5, 42 Google Scholar
Pasquato, M.; Di Cintio, P. 2020, A& A 640, 79 Google Scholar
Polyachenko, E.V.; Shukhman, I.G. 2015, MNRAS 451, 601 CrossRefGoogle Scholar
Pogorelov, I.V.; Kandrup, H.E. 1999 Phys. Rev. E 60, 1567 CrossRefGoogle Scholar
Sideris, I.V.; Kandrup, H.E. 2004 ApJ 602, 678 CrossRefGoogle Scholar
Terzic, B.; Kandrup, H.E. 2003 ArXiv Preprint: arXiv:astro-ph/0312434 Google Scholar
Trenti, M.; Bertin, G. 2006 ApJ 637, 717 CrossRefGoogle Scholar