On the Saturation of Astrophysical Dynamos: Numerical Experiments with the No-Cosines Flow
In the context of astrophysical dynamos we illustrate that the no-cosines flow, with zero mean helicity, can drive fast dynamo action and we study the dynamo’s...
On the width distribution of penumbral filaments in sunspots
The width distribution of the penumbral filaments is estimated using white light photographs obtained with a vacuum, Newtonian type telescope. Observations were...
Performance and Early Results from the GOLF Instrument Flown on the SOHO Mission
GOLF in-flight commissioning and calibration was carried out during the first four months, most of which represented the cruise phase of SOHO towards its final...
Polarization Accuracy Verification of the Chromospheric LAyer SpectroPolarimeter
We have developed an advanced UV spectropolarimeter called Chromospheric LAyer SpectroPolarimeter (CLASP2), aimed at achieving very high accuracy measurements (...
Polarization Calibration of the Chromospheric Lyman-Alpha SpectroPolarimeter for a 0.1 % Polarization Sensitivity in the VUV Range. Part I: Pre-flight Calibration
The Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP) is a sounding rocket experiment designed to measure for the first time the linear polarization of the...
Polarization Calibration of the Chromospheric Lyman-Alpha SpectroPolarimeter for a 0.1% Polarization Sensitivity in the VUV Range. Part II: In-Flight Calibration
The Chromospheric Lyman-Alpha SpectroPolarimeter is a sounding rocket instrument designed to measure for the first time the linear polarization of the hydrogen...
Resonantly Damped Surface and Body MHD Waves in a Solar Coronal Slab with Oblique Propagation
The theory of magnetohydrodynamic (MHD) waves in solar coronal slabs in a zero- β configuration and for parallel propagation of waves does not allow the...
Response of the radial stratification at the base of the convection zone to the activity cycle
We have analyzed the differences in the oscillation eigenfrequencies measured over more than two years of GONG observations (December 1995-April 1998) and SOI...