The Radial Velocity Effects of Stellar SurfacePhenomena

摘要

Radial velocity (RV) studies have been a very successful tool for finding and characteriz-ing extrasolar planets. As RV precision increases, and planet searches press to younger, hotter, andevolved stars, however, this method will more and more bump against limitations set by the hoststars themselves. Cool stellar surfaces present a range of troublesome phenomena such as spots,plage, and convective cells, which can confuse RV measurements. I review how these phenom-ena affect precision RV, scaling laws and timescales which characterize their properties, and somemethods to mitigate, circumvent, or correct for their effects