Lane-Emden Equation for non conventional EoS.

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SUMMARY

The discussion centers on the application of the Lane-Emden equation to an equation of state (EoS) of the form A · ρn + B · ρm, where A and B are real numbers and n and m are rational numbers. The participant questions whether it is valid to solve the Lane-Emden equation separately for Γ = n and Γ = m, and subsequently combine the solutions. The context involves electrostatic corrections to Chandrasekhar's model for non-relativistic white dwarfs, indicating a complex interplay between EoS and stellar structure equations.

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  • Understanding of the Lane-Emden equation
  • Familiarity with equations of state (EoS)
  • Knowledge of Chandrasekhar's model for white dwarfs
  • Basic principles of stellar astrophysics
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Astronomers, astrophysicists, and researchers working on stellar structure and equations of state, particularly those focused on white dwarf models and their complexities.

rsouza01
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Hi,

This is my first topic in PF.

Supose I have an EoS of the type [itex]A \cdot \rho^{n} + B \cdot \rho^{m}[/itex], A and B real numbers, n and m rational numbers (not and imposition). I wonder if it makes any sense to think that I can just solve Lane-Emden equation for [itex]\Gamma = n[/itex] and [itex]\Gamma = m[/itex], and in the end, just add the two solutions (that would be numerical). If so, there's a proof somewhere? If don't, why?

This equation of state arises when one try to add the electrostatic corrections to the Chandrasekhar's model for non relativistic white dwarfs. I'm not sure if my calculations are right, but I think it's a good question.

Thanks in advance, and please forgive my poor english.

Rodrigo
 
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I have experience in EoS's, what exactly are you trying to solve for?
 

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