what's the circular acceleration?

Ana Bonaca (Harvard) and I started the day with a discussion that was in part about how to present our enormous, combinatoric range of results we have created with our information-theory project. One tiny point there: How do you define the equivalent of the circular velocity in a non-axi-symmetric potential? There is no clear answer. One is to do something relating to averaging the acceleration around a circular ring. Another is to use v2/R locally. Another is to use that locally, but on the radial component of the acceleration.

While I was proctoring an exam, Megan Bedell (Flatiron) wrote me to say that our one-d, data-driven spectroscopic RV extraction code is now performing almost as well as the HARPS pipeline, on real data. That's exciting. We had a short conversation about extending our analysis to more stars to make the point better. We believe that our special sauce is our treatment of the tellurics, but we are not yet certain of this.

1 comment:

  1. I did some work on this during my thesis on orbits in barred galaxies. I believe a paper by sanders and v albada used a similar concept. We looked at Max. Tangential force as function of radius to understand gas flow.