The
4 equations of stellar structure
are the basic equations
of hydrostatic
stellar structure.
They must be solved simultaneously on the computer.
But these are just the basic equations for the very basic
stellar structure
of main sequence stars.
They do NOT account for:
stellar rotation,
3-dimensional convection
(they approximate
1-dimensional convection, but
this approxiamtion is a weak point),
stellar magnetic fields,
asteroseismology
(of which a special case is
helioseismology),
starspots
(of which a special case are
sunspots),
stellar activity
(of which a special case is
solar activity),
the centrifugal force,
the Coriolis force,
close binary system effects,
leftover star formation effects,
stellar evolution,
post-main-sequence evolution,
etc.
In fact, writing a
computer code for
solving the
4 equations of stellar structure
with simplified physics ingredients
is a graduate student course project.
It's relatively easy.
Doing state of the art
stellar structure calculations
is, of course, very hard.
The 4 equations of stellar structure
are differential equations
that embody
physical law.
To expand on the last sentence, see the insert below
(local link /
general link: physical_law_solution.html).
Local file: local link: stellar_structure_4_equations.html.
File: Star file:
stellar_structure_4_equations.html.