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Category/Subcategory: Natural Sciences/Astronomy

Mopra Update

Author: Balthasar Indermuehle
Mopra Update

Views: 308

Impulsive coronal heating from large-scale magnetic rearrangements: MHD modeling

Author: Antonino Petralia
IRIS has observed bright spots at the transition region footpoints. These spots showed significant blueshifts in the Si IV line at 1402.77 A (T∼104.9K). Such blueshifts could not be reproduced by coronal loop ... more

Views: 16

Observational needs for understanding solar magnetic activity and the formation of large-­scale transient events

Author: Lidia van Driel-Gesztelyi
The temperature in the solar atmosphere ranges over three orders of magnitude from the photosphere to the corona, which extends up to four during periods of transient activity. Consequently, the wavelengths we can observe certain ... more

Views: 276

The quest of the horizontal magnetic field

Author: Oskar Steiner
An important discovery achieved with Hinode’s Solar Optical Telescope/Spectro-Polarimeter (SOT/SP) was that in the mean, the magnetic field over wide areas of the quiet Sun photosphere is predominantly horizontal, i.e., parallel ... more

Views: 28

Flare forecasting in 3D solar ARs: From theory to facility – SAMNET

Author: robertus erdelyi
Flare forecasting in 3D solar ARs: From theory to facility – SAMNET

Views: 111

Local Turbulence at GREGOR

Author: Oskar von der Lühe
We have measured the refractive index structure coefficient Cn2 at the VTT and GREGOR site for the past four years. We were using a laser scintillometer to measure free atmosphere Cn2 between the VTT and GREGOR towers, and anemome ... more

Views: 103

Magnetic field extrapolation in close binary stars

Author: Volkmar Holzwarth
Rapidly rotating, close binary systems with late spectral type components, such as RS CVn and BY Dra systems, typically posses strong magnetic fields which give rise to distinctive magnetic activity signatures. Further more, mass ... more

Views: 406

Implementing 3D T-tau relations in 1D Stellar Evolutionary Calculations

Author: Jakob Mosumgaard
Brief presentation on the procedure for implementing T-tau relations extracted from 3D simulations into 1D stellar models. More specifically, how the T-tau relations from Trampedach et al. (2014, MNRAS, 442, 805) and variable mixi ... more

Views: 209

Seismology of the solar atmosphere

Author: Tom Van Doorsselaere
In this colloquium, I will give an overview of recent results in performing seismology in the solar atmosphere. I will explain some basic models for coronal loop oscillations, and how they are used for seismology. I will discus ... more

Views: 331

Mode coupling by convection as possible contribution to the surface effect

Author: Markus Roth
In this talk I present the effect of advection on the solar eigenfrequencies and how it could contribute to the surface effect.

Views: 227