Improvement of the photometric sunspot index and changes of thedisk-integrated sunspot contrast with time

Astrophysical quantities

D. Lynden-Bell · Journal of Atmospheric and Terrestrial Physics · 1974 · 1.6K citations

A new sunspot umbral model and its variation with the solar cycle

P. Maltby, E. H. Avrett, M. Carlsson et al. · The Astrophysical Journal · 1986 · 524 citations

Natural Sciences, Astronomy, Physics +16

Magnetic modulation of solar luminosity by photospheric activity

P. Foukal, J. Lean · The Astrophysical Journal · 1988 · 298 citations

Natural Sciences, Astronomy, Astrophysics +16

The effects of sunspots on solar irradiance

H. S. Hudson, S. Silva, M. F. Woodard et al. · Solar Physics · 1982 · 121 citations

Natural Sciences, Astronomy, Earth Sciences +12

The effect of magnetic fields on solar luminosity

P. Foukal, J. E. Vernazza · The Astrophysical Journal · 1979 · 63 citations

Natural Sciences, Astronomy, Physics +15