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Category/Subcategory: Natural Sciences/Astronomy

Possible chromospheric response to the dynamics of photospheric G-band bright points

Author: Marcela Bodnárová
We studied spectroscopic signatures of potential means of energy transport into the chromosphere by investigating temporal variations of the width, the intensity and the Dopplershift of the Hα spectral line profile observed by th ... more

Views: 212

Contribution of sunspots to the observed frequency shifts

Author: Ângela R. G. Santos
The frequencies of the solar oscillations are known to vary in phase with the Sun's activity level. The solar cycle is accompanied by changes in the overall magnetic field as well as in the area covered by active regions, which c ... more

Views: 242

Accurate mean density and surface gravity of Delta Scuti stars using Asteroseismology

Author: Antonio García Hernández
In the work we present here, we empirically demonstrate that a simple relation exists between a periodic pattern present in the frequency spectra of Delta Scuti stars and their mean density. This relation is homologous to that of ... more

Views: 219

SPRING – The Solar Physics Research Integrated Network Group

Author: Markus Roth
A concept for a next-generation solar observing network for helioseismology, magnetic fields, and activity. Status report of the SPRING Joint Research Activity under Solarnet.

Views: 137

Large scale flows and stellar magnetic cycles

Author: Markus Roth
I will talk about our studies of detecting periodic frequency shifts in asteroseismic data from Kepler and about the coupling of modes due to convection in sub-giant stars.

Views: 224

Helioseismology Overview and Solar Orbiter

Author: Markus Roth
This presentation was given at the Solar Orbiter Science Activity Plan Meeting #4. It is a review on the techniques and achievements of helioseismology during the last decades. Furthermore, it gives an outlook on the science to ... more

Views: 118

Slipping reconnection in a solar flare observed with GREGOR

Author: Michal Sobotka
A small flare ribbon above a sunspot umbra in active region 12205 was observed on November 7, 2014, at 12:00 UT in the blue imaging channel of the 1.5-m GREGOR telescope, using a 1 A Ca II H interference filter. Context observatio ... more

Views: 251

SPRING - Solar Physics Research Integrated Network Group

Author: Markus Roth
Presentation given at 11th European Space Weather Week by Alexei Pevtsov PRING is a project to develop a geographically distributed network of instrumentation to obtain synoptic solar observations. Building on the demonstrated ... more

Views: 191