activity
20022025
most citedGrand minima and maxima of solar activity: New observational constraints

448 citations · 3.8k across the 82 of their papers we have counts for

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Showing 2009Show all

6 papers · 1 filter

astro-ph.SR2009★ 38 cited

Reconstructed and measured total solar irradiance: Is there a secular trend between 1978 and 2003?

T. Wenzler, S. K. Solanki, N. A. Krivova

Total solar irradiance reconstructed between 1978 and 2003 using solar surface magnetic field distributions is compared with three composites of total solar irradiance measurements…

astro-ph.SR2009★ 32 cited

Stereoscopic Polar Plume Reconstructions from Stereo/Secchi Images

L. Feng, B. Inhester, S. K. Solanki +7

We present stereoscopic reconstructions of the location and inclination of polar plumes of two data sets based on the two simultaneously recorded images taken by the EUVI telescope…

astro-ph.SR2009★ 63 cited

Stray light correction and contrast analysis of Hinode broad band images

S. K. Mathew, V. Zakharov, S. K. Solanki

The contrasts of features in the quiet Sun are studied using filtergrams recorded by the Broad-band Filter Imager on the Hinode/Solar Optical Telescope. In a first step, the scatte…

astro-ph.SR2009★ 125 cited

A homogeneous database of sunspot areas covering more than 130 years

L. Balmaceda, S. K. Solanki, N. Krivova +1

The historical record of sunspot areas is a valuable and widely used proxy of solar activity and variability. The Royal Greenwich Observatory (RGO) regularly measured this and othe…

astro-ph.SR2009★ 59 cited

Bright fibrils in Ca II K

A. Pietarila, J. Hirzberger, V. Zakharov +1

Context: Except for the Ca II resonance lines, fibrils are ubiquitously present in most high-resolution observations of chromospheric lines. Aims: We show that fibrils are also a p…

astro-ph.SR2009★ 11 cited

SUMER observations of the inverse Evershed effect in the transition region above a sunspot

L. Teriaca, W. Curdt, S. K. Solanki

Aims. We analyse SUMER spectral scans of a large sunspot within active region NOAA 10923, obtained on 14-15 November 2006, to determine the morphology and dynamics of the sunspot a…