Dynamical system describing cloud of particles in relativistic and non-relativistic framework
DOI:
https://doi.org/10.12775/TMNA.2026.007Słowa kluczowe
Dynamical system, Lyapunov function, Einstein equation, TOV model, Smoluchowski-Poisson equation, general relativityAbstrakt
We consider a fairly general class of dynamical systems under assumptions that guarantee the existence of a Lyapunov function around a nontrivial stationary point. Moreover, we prove the existence of a heteroclinic trajectory. Finally, using geometric and topological reasoning, we establish an upper bound for this trajectory. The results can be interpreted as limit theorems in terms of integrated densities for astrophysical models in both relativistic and classical frameworks. These models encompass the static Smoluchowski-Poisson and Tolman-Oppenheimer-Volkoff equations.Bibliografia
L. Andersson and A.Y. Burtscher, On the asymptotic behaviour of static perfect fluids, Ann. Henri Poincaré 20 (2019), 813–857.
A.E. Becerra-Vergara, C.R. Argüelles, A. Krut, J.A. Rueda, R. Ruffini, Hinting a dark matter nature of Sgr A∗ via the S-stars, Mon. Not. Roy. Astron. Soc. 505 (2021), 64–68.
P. Biler, D. Hilhorst and T. Nadzieja, Existence and nonexistence of solutions for a model of gravitational interaction of particles II, Colloq. Math. 67 (1994), 297–308.
H. Bondi, On spherically symmetric accretion, Mon. Not. Roy. Astron. Soc. 112 (1952), 195–204.
D. Bors and R. Stańczy, Models of particles of the Michie–King type, Comm. Math. Phys. 382 (2021), 1243–1262.
D. Bors and R. Stańczy, Dynamical system describing cloud of particles, Journal of Differential Equations 342 (2023), 21–23.
D. Bors and R. Stańczy, Mathematical model for Sagittarius A∗ and related Tolman–Oppenheimer–Volkoff equations, Math. Methods Appl. Sci. 46 (2023), 12052–12063.
D. Bors and R. Stańczy, Dynamical system for Tolman–Oppenheimer–Volkoff equation, Discrete Contin. Dyn. Syst. Ser. B 30 (2025), 4482–4497.
H.A. Buchdahl, General relativistic fluid spheres, Phys. Rev. 116 (1939), 1027–1034.
S. Chandrasekhar, A limiting case of relativistic equilibrium, General Relativity (L. O’Raifeartaigh, ed.), Clarendon Press, Oxford, 1972, pp. 185–199.
P.H. Chavanis, Relativistic stars with a linear equation of state: analogy with classical isothermal spheres and black holes, Astronomy & Astrophysics 483 (2008), 673–698.
D. Christodoulou, Self–gravitating relativistic fluids: a two–phase model, Arch. Rational Mech. Anal. 130 (1995), 343–400.
A. Einstein On a stationary system with spherical symmetry consistring of many gravitating masses, Ann. of Math. 40 (1939), 922–936.
S.E. Koposov, D. Boubert, T.S. Li, D. Erkal, G.S. Da Costa, D.B. Zucker, A.P. Ji, K. Kuehn, F. Lewis, D. Mackey, J.D. Simpson, N. Shipp, Z. Wan, V. Belokurov, J. Bland-Hawthorn, S.L. Martell, T. Nordlander, A.B. Pace, G.M. De Silva and M.-Y. Wang, Discovery of a nearby 1700 km/s star ejected from the Milky Way by Sgr A*, Mon. Not. R. Astron. Soc. 491 (2020), 2465–2480.
A. Krut, C.R. Argüelles, P.-H. Chavanis, J.A. Rueda, R. Ruffini, Galaxy rotation curves and universal scaling relations: comparison between phenomenological and fermionic dark matter profiles, Astroph. J. 945 (2023), 16 pp.
T. Makino, On spericallly symmetric stellar models in general relativity, J. Math. Kyoto Univ. 38 (1998), 55–69.
J.R. Oppenheimer and H. Snyder, On continued gravitational contraction, Phys. Rev. 56 (1939), 455–459.
J.R. Oppenheimer and G.M. Volkoff, On massive neutron cores, Phys. Rev. 55 (1939), 374–381.
H.R. Russell, A.C. Fabian,B.R. McNamara and A.E. Broderick, Inside the Bondi radius of M87, Mon. Not. R. Astron. Soc. 451 (2015), 588–600.
K. Schwarzschild, Über das Gravitationsfeld eines Massenpunktes nach der Einsteinschen, Königlich Preussische Akademie der Wissenschaften, 1916, Berlin, Sitzungberichte, pp. 189–196; English transl.: On the gravitational field of a mass point according to Einstein’s theory, arXiv: physics/9905030.
R.C. Tolman, Static solutions of Einstein’s field equations for spheres of fluid, Phys. Rev. 55 (1939), 364–373.
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Prawa autorskie (c) 2026 Robert Stańczy, Dorota Bors

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