390 citations · 5.1k across the 93 of their papers we have counts for
4 papers · 1 filter
Spectral irradiance variations: Comparison between observations and the SATIRE model on solar rotation time scales
Yvonne C. Unruh, Natalie A. Krivova, Sami K. Solanki +2
Aims: We test the reliability of the observed and calculated spectral irradiance variations between 200 and 1600 nm over a time span of three solar rotations in 2004. Methods: We c…
On the potential value of Ca II K spectroheliogram time-series for solar activity and irradiance studies
I. Ermolli, S. K. Solanki, A. G. Tlatov +3
Various observatories around the globe started regular full-disk imaging of the solar atmosphere in the Ca II K line since the early decades of the 20th century. The archives made…
Reconstruction of solar irradiance using the Group sunspot number
L. Balmaceda, N. A. Krivova, S. K. Solanki
We present a reconstruction of total solar irradiance since 1610 to the present based on variations of the surface distribution of the solar magnetic field. The latter is calculate…
Properties of sunspots in cycle 23: I. Dependence of brightness on sunspot size and cycle phase
S. K. Mathew, V. Martinez Pillet, S. K. Solanki +1
In this paper we investigate the dependence of umbral core brightness, as well as the mean umbral and penumbral brightness on the phase of the solar cycle and on the size of the su…