
#1
Sep605, 09:10 PM

P: 3

have solved the lane  emden eqn numerically for scaled radius, and the derivative of scaled pressure with respect of scaled radius, are given the eqn of state, n, and mass, how would i go about working out the central density and the radius?
thanks 



#2
Sep805, 09:17 PM

P: 60

Huh? Sorry, but can you restate that a little more clearly? Maybe include the equations you worked with too?




#3
Dec908, 07:13 PM

P: 133

[tex]S_{n} = \sqrt{ \frac{(n+1) k_{B}}{4 \pi G m} \frac{T_{c}}{\rho_{c}} }The central density & temperature are Free Parameters*. * For derivation, see: http://www.physicsforums.com/showthread.php?t=278009 [post #8] 


Register to reply 
Related Discussions  
White dwarf  Astrophysics  1  
A white dwarf formed by a supernova, possible?  Astrophysics  2  
astro  modeling white dwarf via polytrope  Introductory Physics Homework  0  
Quasars,white dwarf and neutron stars  General Astronomy  8  
How is the density of a white dwarf star calculated?  Astrophysics  10 