F. Middelkoop

CA II H and K measurements made at Mount Wilson Observatory, 1966-1983

D. K. Duncan, A. H. Vaughan, O. C. Wilson et al. · The Astrophysical Journal Supplement Series · 1991 · 436 citations

Natural Sciences, Astronomy, Physics +12

Stellar rotation in lower main-sequence stars measured from time variations in H and K emission-line fluxes. I - Initial results

A. H. Vaughan, George W. Preston, S. L. Baliunas et al. · The Astrophysical Journal · 1981 · 176 citations

Natural Sciences, Astronomy, Physics +14

Stellar rotation in lower main-sequence stars measured from time variations in H and K emission-line fluxes. II - Detailed analysis of the 1980 observing season data

S. L. Baliunas, Lee Hartmann, R. W. Noyes et al. · The Astrophysical Journal · 1983 · 110 citations

Natural Sciences, Astronomy, Physics +13

Magnetic structure in cool stars. IV - Rotation and CA II H and K emission of main-sequence stars

F. Middelkoop · 1982 · 21 citations

Natural Sciences, Astronomy, Physics +17

Magnetic structure in cool stars. I. The CA II H and K emission from giants.

F. Middelkoop, C. Zwaan · 1981 · 15 citations

Natural Sciences, Astronomy, Physics +15