- #1
PaulWright
- 10
- 0
Homework Statement
Two stars are in a circular visual binary system. The orbital
period of the binary is 30 years. The distance to the binary is 20
parsecs. The angular radius of the orbit of each star is 1". What
are the masses of the two stars?
each star works out to be 4.4 solar mass
2. From your result above, what should be the apparent magnitude of
the binary as a whole? You may assume that both stars are on the main
sequence, and that the standard mass-luminosity relationship applies
here. You may further assume that the absolute magnitude of the Sun
is 5.7. (Note: full credit for this question will be given for
answers that follow the right prodcedure, but start with an incorrect
answer to question 1).
Homework Equations
m=M+5(log(d)-1)
The Attempt at a Solution
mass of the whole binary system is 8.8M(sun)
I have no idea what the mass luminosity relationship is.
I just need some help getting started.
Cheers,
Paul