Table of Contents

The Dehnen & Binney model contains three components: a disk, bulge and halo. The disk is made up of three components: ISM, thin and thick stellar disk, each of them a double (in R and |z|) exponential disk. The bulge and halo are both parameterized flattened spheroids.

The units differ from those used in class GalPot: we have quantity | here | GalPot | unit -----------------------+---------------+---------------+-------------- unit of length | 1 | 1 | kpc unit of time | 1 E+9 | 1 E+6 | yr unit of mass | 2.2228847 E+5 | 1 | solar masses unit of velocity | 0.9777753 | 9.777753 E+2 | km/s unit of potential | 0.95604457 | 9.5604457 E+5 | (km/s)^2 unit of acceleration | 0.9777753 E-9 | 0.977753 E-6 | km/s/yr The implied size of Newton’s constant G are G = 1 here G = 4.49865897 E-12 in GalPot units

The unit system used throughout the classes and functions defined here and in included files is based on the following basic unitsunit of length:1 kilo parsec (kpc)unit of time:1 mega year (Myr)unit of mass:1 solar mass (Msun) This implies the following dimensions quantity dimension / seize using other units --------------------------------------------------------------------------- angular vel. 1 Myr^-1= 977.775320024919 km/s/kpc velocity 1 kpc/Myr = 977.775320024919 km/s action/mass 1 kpc^2/Myr = 977.775320024919 kpc*km/s potential 1 kpc^2/Myr^2 = 956044.576449833 (km/s)^2 acceleration 1 kpc/Myr^2 G 4.49865897 E-12 kpc^3/Myr^2/Msun 4 Pi G 5.65318158 E-11 kpc^3/Myr^2/Msun

pot.1Rd/R0=0.25 pot.2Rd/R0=0.30 pot.3Rd/R0=0.35 pot.4Rd/R0=0.40 pot.2aRd/R0=0.30 pot.2b pot.2c pot.2d pot.2e pot.2f pot.2g pot.2h pot.2i pot.4aRd/R0=0.40 pot.4b pot.4c pot.4d pot.4e pot.4f pot.4g pot.4h pot.4i pot.2.1these an remaining ones are not mentioned in their 1998 paper. pot.2.2 pot.2.3 pot.2.4 pot.4.1 pot.4.2 pot.4.3 pot.4.4 pot.10 pot.20 pot.40

% potlist GalPot potfile=$NEMODAT/GalPot/pot.1 x=1

1998MNRAS.294..429D : Mass models of the Milky Way : Dehnen, Walter; Binney, James

$NEMODAT/GalPotdirectory with GalPot descriptors

8-nov-08createdPJT