Does the meaning of K depend on e?
davidwhogg opened this issue · 4 comments
davidwhogg commented
Here's my question: If you FIX total system mass and FIX period and FIX inclination, but consider orbits of different eccentricity, will they have the same value of the velocity semi-amplitude K? Do you know what I'm sayin'?
dfm commented
No. See eq. ~13 of: http://exoplanets.astro.yale.edu/workshop/EPRV/Bibliography_files/Radial_Velocity.pdf
K scales as 1/sqrt(1-e^2)
davidwhogg commented
Oh yay! I think you have answered our question. I think I can make a new issue that makes more sense, which is "make the meaning of K NOT depend on e, internally within The Joker".
davidwhogg commented
ps, Debra Fischer consistently produces useful stuff for the exoplanet community. We're not worthy.