Results 21 to 30 of about 779,528 (296)

Revisiting Vainshtein screening for fast N-body simulations

Journal of Cosmology and Astroparticle Physics, 2023
AbstractWe revisit a method to incorporate the Vainshtein screening mechanism inN-body simulations proposed by R. Scoccimarro in [1]. We further extend this method to cover a subset of Horndeski theories that evade the bound on the speed of gravitational waves set by the binary neutron star merger GW170817.
Brando, Guilherme, Koyama, Kazuya, Winther, Hans Arnold   +2 more
openaire   +5 more sources

N-body simulations of the Carina dSph in MOND [PDF]

, 2014
The classical dwarf spheroidals (dSphs) provide a critical test for Modified Newtonian Dynamics (MOND) because they are observable satellite galactic systems with low internal accelerations and low, but periodically varying, external acceleration.
Angus, Garry W., Diaferio, Antonaldo, Famaey, Benoit, Gentile, Gianfranco, van der Heyden, Kurt J.   +4 more
core   +4 more sources

N-body Simulations of Galaxy Formation [PDF]

Symposium - International Astronomical Union, 1988
Modern N-body techniques allow the study of galaxy formation in the wider context of the formation of large-scale structure in the Universe. The results of such a study within the cold dark matter cosmogony are described. Dark galactic halos form at relatively recent epochs.
openaire   +1 more source

The BEHOMO project: $Λ$LTB $N$-body simulations

arXiv.org, 2022
Our Universe may feature large-scale inhomogeneities and anisotropies which cannot be explained by the standard model of cosmology, that is, the homogeneous and isotropic FLRW metric, on which the $Λ$CDM model is built, may not describe accurately observations.
Marra, V., Castro, T., Camarena, D., Borgani, S., Ragagnin, A.   +4 more
openaire   +1 more source

Gravitational clustering in N-body simulations

, 2001
In this talk we discuss some of the main theoretical problems in the understanding of the statistical properties of gravity. By means of N-body simulations we approach the problem of understanding the r\^ole of gravity in the clustering of a finite set ...
Amici, A., Bottaccio, M., Dolcetta, R. Capuzzo, Miocchi, P., Montuori, M., Pietronero, L.   +5 more
core   +2 more sources

Direct N-body simulations

Journal of Computational and Applied Mathematics, 1999
32 pages, 13 figures, in press in Riffert, H., Werner K. (eds), Computational Astrophysics, The Journal of Computational and Applied Mathematics (JCAM), Elsevier Press, Amsterdam ...
openaire   +2 more sources

N-body simulations of gravitational dynamics

, 2011
We describe the astrophysical and numerical basis of N-body simulations, both of collisional stellar systems (dense star clusters and galactic centres) and collisionless stellar dynamics (galaxies and large-scale structure).
A. Ahmad, A. Brandt, A. Ishibashi, A. King, A. Klypin, A. Lenard, A. Sills, A. Sills, A. Tanikawa, A.V. Kravtsov, B. Lanzoni, B. Moore, B. Moore, C. Dupraz, C. Lajoie, C. Power, C. Theis, C.D. Bailyn, C.D. Bailyn, C.S. Frenk, D. Lynden-Bell, D. Pinchon, D. Sugimoto, D.C. Heggie, D.C. Heggie, D.C. Heggie, D.C. Heggie, D.J. Faulkner, D.J. Price, E. Athanassoula, E. Athanassoula, E. Gaburov, E. Holmberg, E. Kim, E. Kokubo, E. Komatsu, E. Terlevich, E.H. Morgan, F. Combes, F. Hohl, F.I. Cooperstock, G. Efstathiou, G. Efstathiou, G. Lodato, G.D. Quinlan, H. Baumgardt, H. Baumgardt, H. Baumgardt, H. Baumgardt, H. Baumgardt, H. Baumgardt, H. Cheng, H. Cohn, H. Yoshida, H. Yoshida, H.B. Perets, H.C. Plummer, I.A. Bonnell, I.T. Iliev, J. Dubinski, J. Dubinski, J. Heyvaerts, J. Magorrian, J. Magorrian, J. Makino, J. Makino, J. Makino, J. Makino, J. Makino, J. Stadel, J.E. Barnes, J.E. Barnes, J.E. Barnes, J.E. Greene, J.F. Navarro, J.G. Hills, J.K. Salmon, J.M. Fregeau, J.R. Hurley, K. Gebhardt, K. Gebhardt, K. Heitmann, K. Nitadori, K. Takahashi, L. Cullen, L. Greengard, L. Hernquist, L. Hernquist, L. Hernquist, L. Hernquist, M. Clutton-Brock, M. Davis, M. Freitag, M. Giersz, M. Hénon, M. Suzuki, M. Trenti, M. Volonteri, M. Zemp, M.B. Davies, M.D. Weinberg, M.D. Weinberg, M.S. Warren, N.N. Kozlov, P. Bode, P. Hut, P. Hut, P. Hut, P. Kustaanheimo, P. Madau, P. Saha, P. Saha, P.J. Quinn, P.J.E. Peebles, P.P. Ewald, Q. Sheng, R. Balescu, R. Klessen, R. Lynds, R. Spurzem, R. Spurzem, R. Teyssier, R.A. James, R.B. Larson, R.H. Miller, R.P. Church, R.P. Church, S. Chin, S. Ghigna, S. Harfst, S. Harfst, S. Inagaki, S. Mikkola, S. Mikkola, S. Mikkola, S. von Hoerner, S.D.M. White, S.D.M. White, S.D.M. White, S.F. Portegies Zwart, S.F. Portegies Zwart, S.F. Portegies Zwart, S.J. Aarseth, S.J. Aarseth, S.J. Aarseth, S.J. Aarseth, S.L.W. McMillan, T. Buchert, T. Fukushige, T. Holder, T. Ito, T.A. McGlynn, T.M. Éneev, V. Springel, V. Springel, V. Springel, V. Springel, V.F. Mukhanov, W. Dehnen, W. Dehnen, W. Dehnen, W. Priestley, W.D. Elliott, W.E. Harris   +163 more
core   +1 more source

The Halo Density Profiles with Non-Standard N-body Simulations [PDF]

, 2002
We propose a new numerical procedure to simulate a single dark halo of any size and mass in a hierarchical framework coupling the extended Press-Schechter formalism (EPSF) to N-body simulations.
Chincarini, Guido, D'Onghia, Elena, Firmani, Claudio   +2 more
core   +2 more sources

On the reliability of N-body simulations [PDF]

Computational Astrophysics and Cosmology, 2015
AbstractThe general consensus in the N-body community is that statistical results of an ensemble of collisional N-body simulations are accurate, even though individual simulations are not. A way to test this hypothesis is to make a direct comparison of an ensemble of solutions obtained by conventional methods with an ensemble of true solutions.
Boekholt, T.C.N., Portegies Zwart, S.F.
openaire   +3 more sources

Bias deconstructed: Unravelling the scale dependence of halo bias using real space measurements [PDF]

, 2013
We explore the scale dependence of halo bias using real space cross-correlation measurements in N-body simulations and in Pinocchio, an algorithm based on Lagrangian Perturbation Theory. Recent work has shown how to interpret such real space measurements
Chan, Kwan Chuen, Desjacques, Vincent, Monaco, Pierluigi, Paranjape, Aseem, Sefusatti, Emiliano, Sheth, Ravi K.   +5 more
core   +2 more sources