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Category/Subcategory: Natural Sciences/Astronomy

Subsurface helicity of active regions 12192 and 10486

Author: Rudolf Komm
The active region 10486 that produced the Halloween flares in 2003 initiated our interest in the kinetic helicity of subsurface flows associated with active regions. This lead to the realization that the helicity of subsurface fl ... more

Views: 223

200 nights with μ Herculis: early results from the Hertzsprung SONG telescope

Author: Joergen Christensen-Dalsgaard
The SONG Hertzsprung telescope, at the Observatorio del Teide, Izana, Tenerife, is a prototype for the telescopes in the planned SONG (Stellar Observations Network Group) network for asteroseismology and exoplanet studies. It has ... more

Views: 229

The EST Governance Structure

Author: Markus Roth
In the coming four years the governance structure for the European Solar Telescope (EST) needs to be defined. For this various governance models for multi-national collaborations need to be studied. In this presentation I will d ... more

Views: 39

Models and data combined to progress towards a better understanding of the magnetism of solar-type stars

Author: Laurene Jouve
We will review recent progress made in modeling solar-type stars in 2D and 3D in the recent years. In particular, we will focus on advances in our understanding of the dynamo processes in such astrophysical objects and the necessa ... more

Views: 282

Seismological insights into solar and stellar magnetic activity cycles

Author: Anne-Marie Broomhall
The Sun’s magnetic activity cycle varies primarily on a time scale of 11yrs from minimum to maximum and back again. It is well-known that the properties of the Sun’s acoustic oscillations are affected by the near-surface inter ... more

Views: 339

Asteroseismology of solar-like oscillators: recent results

Author: Saskia Hekker
Asteroseismology — the study of stellar interiors through their global oscillations — has been revolutionised with the launch of dedicated space missions. The CoRoT and Kepler satellites perform(ed) high precision photometric ... more

Views: 164

A short history of Mopra

Author: Michael Burton
A short history of Mopra: A tale of MUM & SIS, their MOPS & MUG, FUDD, VSOP & TOAD

Views: 235

High-resolution Ca II 8542 observations of an M-class solar flare

Author: Christoph Kuckein
An M3.2 flare was observed in 2013 May 17 with the Vacuum Tower Telescope (VTT, Tenerife, Spain) at a heliocentric angle of 0.8. The observations covered the activation, impulsive, and relaxation phases of the flare. This work is ... more

Views: 6

What red giant seismology is teaching us about stellar physics

Author: Sebastien Deheuvels
Since the detection of non-radial oscillations in over 10,000 red giants by space missions CoRoT and Kepler, the seismology of these objects has rightfully gained interest among the stellar physics community. The detection of mixe ... more

Views: 235

On the Utility of Diagrams of Small Frequency vs Large Frequency Separation

Author: George Angelou
Over 35 years ago, it was proposed that there exists diagnostic potential in combining the small and large frequency separations for solar-like oscillators. Since then, we have been spoilt with a plethora long-timeseries photome ... more

Views: 437