Ca ii K2V spectral features and their relation to small-scale photospheric magnetic fields

Although the Ca ii K₂₃₂ network is known to be cospatial with magnetic elements there has been doubt as to the magnetic origin of the fainter K_2V points. We demonstrate that weak magnetic elements also lie at the roots of the K_2V points, and because the latter are numerous they may contribute sensibly to the integrated light profile of Ca ii K.Operated by the Association of Universities for Research in Astronomy, Inc., under contract with the National Science Foundation.