Free Access

 

 

Table 1:

Density laws and associated parameters.
  Density law Constants $\rho_{\rm c}$
    (kpc) ( $M_{\odot}~\rm pc^{-3}$)

Bulge
${\rm e}^{-(r/r_{0})^{2}}$ r0=0.5 $\frac{M_{\rm b}}{4\pi r_{0}^{3}}=12.73$
Thin disc ${\rm e}^{-R/h_{R}}\textrm{sech}^{2}(-z/h_{z})$ hR=2.5 $\frac{M_{\rm tn}}{4\pi h_{R}^{2}h_{z}}=1.881$
    hz=0.352  
Thick disc ${\rm e}^{-R/h_{R}}{\rm e}^{-z/h'_{z}}$ hR = 2.5 $\frac{M_{\rm tk}}{4\pi h_{R}^{2}h'_{z}}=0.0286$
    h'z=1.158  
Halo $ [(1+(\frac{a}{a_{0}})^{2})]^{-1}$ a0 = 2.7 0.108

Notes. r is the spherical radius from the center of the Galaxy and r0 is bulge scale length; R and z are the natural cylindrical coordinates of the axisymmetric disc, hR is the scale length of the disc, hz is the scale height of the thin disc, h'z is the scale height of the thick disc; a is the radius of the halo and a0is a constant; $\rho_{\rm c}$ is the central mass density.


Source LaTeX | All tables | In the text

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.