AHF finds a virial radius for satellites. How?

zhafen / linefinder

A tool for finding and classifying the worldlines of Lagrangian parcels of mass, in the context of hydrodynamic simulations of galaxy formation.

https://zhafen.github.io/linefinder

MIT License

0 stars 1 forks source link

AHF finds a virial radius for satellites. How? #88

Closed zhafen closed 6 years ago

zhafen commented 6 years ago

Originally reported by Zachary Hafen (Bitbucket: zhafen, GitHub: zhafen)

How can AHF find a virial radius for satellites, if the virial radius is defined as an overdensity?

Bitbucket: https://bitbucket.org/zhafen/pathfinder/issue/88

zhafen commented 6 years ago

Original comment by Zachary Hafen (Bitbucket: zhafen, GitHub: zhafen)

AHF really uses the truncation radius for satellites, defined as when the radial density profile for satellites turns upwards. This is probably not the best thing to use... Another good reason to use stellar half-mass radius as the length scale.