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SingLe: A F90-package devoted to Softened Gravity in gaseous

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SingLe: A F90-package devoted to Softened Gravity in gaseous discs

Postby owlice » Thu Oct 14, 2010 5:17 pm

SingLe: A F90-package devoted to Softened Gravity in gaseous discs

Abstract: SofteningLength: Because Newton's law of Gravitation diverges as the relative separations |r'-r| tends to zero, it is common to add a positive constant λ also known as the "softening length", i.e. :

|r'-r|² ← |r'-r|² + λ².


SingLe determines the appropriate value of this Softening Length λ for a given disc local structure (thickness 2h and vertical stratification ρ), in the axially symmetric, flat disc limit, preserving at best the Newtonian character of the gravitational potential and associated forces. Mass density ρ(z) is assumed to be locally expandable in the z-direction according to:

ρ(z)= ρ0[1 + a1(z/h)2+...+aq (z/h)2q+...+aN (z/h)2 N].


Credit: Huré, Jean-Marc; Pierens, Arnaud

Site: http://perso.astrophy.u-bordeaux.fr/JMH ... _inter.php
http://adsabs.harvard.edu/abs/2009A%26A...507..573H

Bibcode: 2010ascl.soft10026H

ID: ascl:1010.026
Last edited by Ada Coda on Sun Jun 10, 2018 8:16 pm, edited 1 time in total.
Reason: Updated code entry.
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