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N-body units — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/N-body_units
License (as archived): CC-BY-SA-4.0
Archived: 2026-10-07T17:42:39.408Z
SHA-256 of the archived text: 09b53bc139b2e3997d128a7720a2365d8e8a8b0227d816074cef7c19d84e5c89
Stable URL of this page: https://metraipolis.com/documento/dc_eb555e82ea18

How to cite

N-body units — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/N-body_units (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_eb555e82ea18 (Metraipolis archive dc_eb555e82ea18, sha256 09b53bc139b2e3997d128a7720a2365d8e8a8b0227d816074cef7c19d84e5c89)

BibTeX

@misc{dceb555e82ea18,
  title = {N-body units — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/N-body_units},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_eb555e82ea18; sha256 09b53bc139b2e3997d128a7720a2365d8e8a8b0227d816074cef7c19d84e5c89},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/N-body_units. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

N-body units are a completely self-contained system of units used for N-body simulations of self-gravitating systems in astrophysics. In this system, the base physical units are chosen so that the total mass, M, the gravitational constant, G, and the virial radius, R, are normalized. The underlying assumption is that the system of N objects (stars) satisfies the virial theorem. The consequence of standard N-body units is that the velocity dispersion of the system, v, is 1 2 2 {\displaystyle \scriptstyle {\frac {1}{2}}{\sqrt {2}}} and that the dynamical or crossing time, t, is 2 2 {\displaystyle \scriptstyle 2{\sqrt {2}}} . The use of standard N-body units was advocated by Michel Hénon in 1971. Early adopters of this system of units included H. Cohn in 1979 and D. Heggie and R. Mathieu in 1986. At the conference MODEST14 in 2014, D. Heggie proposed that the community abandon the name "N-body units" and replace it with the name "Hénon units" to commemorate the originator.

Tema degli esploratori: fisica e astronomia (deposito sistematico; categoria «Physical cosmology»).
Fonte: Wikipedia in inglese, voce «N-body units» — https://en.wikipedia.org/wiki/N-body_units
Wikidata Q6951462 (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q6951462
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/N-body_units?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1349284680, consultata il 2026-10-07T17:12:25.511Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: e4eb7bf27200acde739af25cc53d9526c352a94d19509be30509696a495c612c