Section 8 - Binary Stars and fundamental parameters Flashcards
(8 cards)
1
Q
What are the types of binary systems?
A
Visual
Spectroscopic
Eclispising
2
Q
What is a visual binary?
A
Both components can be seen and tracked
3
Q
What is the Kepler mass-radius equation for circular orbits?
A
m1r1=m2r2
4
Q
What is the mass equation for a visual binary?
A
M1+M2=4π2/G (r1+r2)3/P2
5
Q
What is the evidence for a spectroscopic binary?
A
Two sets of absorption lines
Doppler shift of absorption lines
6
Q
What is the equation for mass for a spectroscopic binary?
A
M1+M2=(v1+v2)3 P/2πG
7
Q
What is the radial velocity of a binary star?
A
v=2πr1/P
8
Q
What is an eclipsing binary?
A
With alignment, one star can block the light of the other
