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Category/Subcategory: Natural Sciences/Physics

Magnetic Helicity as a Predictor of the Solar Cycle

Author: Gareth Hawkes
It is known that the poloidal field is at its maximum during solar minima, and that its behaviour during this time acts as a strong predictor of the strength of the following solar cycle. This relationship relies on the action of ... more

Views: 304

The small scale magnetic elements on the photosphere: a turbulent story

Author: Dario Del Moro
The study of the dynamics of the photosphere allow us to investigate the physical processes occurring in both the interior of the Sun and in the higher layers of the solar atmosphere due the magnetic coupling between the photosphe ... more

Views: 53

Observations of absolute convective blue-shifts with LARS at the VTT

Author: Johannes Löhner-Böttcher
The Laser Absolute Reference Spectrograph (LARS) is a novel scientific instrument for solar observations with the Vacuum Tower Telescope (VTT) on Tenerife. It works as a combination of the high-resolution Echelle Spectrograph of t ... more

Views: 229

Physics-based models for forecasting Space Weather

Author: Stefaan Poedts
Solar Coronal Mass Ejections (CMEs) are large-scale eruptive events in which large amounts of plasma (up to 1013-1016 g) and magnetic field are expelled into interplanetary space at very high velocities (typ. 450 km/s, but up to 3 ... more

Views: 48

The EST status

Author: Manuel Collados
EST will be the largest solar telescope ever built in Europe. With a 4-metre primary mirror and state-of-the-art technology, it will furnish astronomers with a unique tool to understand the Sun. The main goal of EST is to investig ... more

Views: 271

How much can the damping of the observed power spectrum of transverse waves contribute to coronal heating?

Author: Paolo Pagano
Observations of coronal loops have long revealed ubiquitous, transverse velocity perturbations, that undergo strong damping as they propagate. Observational estimates show that these perturbations contain significant amounts of en ... more

Views: 55

Space Weather using ground-based data

Author: Astrid Veronig
In this talk, I review the availability and use of ground-based observations for the study of the solar sources of space weather. High-cadence full-disk imaging in the H-alpha spectral line provides us with a valuable means to ide ... more

Views: 531

A statistical study of CME properties and of the correlation between flares and CMEs over solar cycles 23 and 24

Author: compagnino antonio alessio
The Large Angle Spectrometric Coronagraph (LASCO), onboard the Solar and Heliospheric Observatory (SOHO) provided us observations extending for the two Solar Cycles 23 and 24 (31 July 1996 - 31 March 2014) that allow one to compar ... more

Views: 37

Mechanism of mean flow generation in rotating turbulence and its relation to inertial wave

Author: Kazuhiro INAGAKI
Recent numerical simulation revealed that large-scale flow is generated in a rotating system with inhomogeneous helicity. However its mechanism was not examined in terms of the Reynolds stress transport. In this study, the large-e ... more

Views: 109

Inverse transfer of energy in the decayinng turbulence

Author: Kiwan Park
In our conventional understanding, large-scale magnetic fields are thought to originate from an inverse cascade in the presence of magnetic helicity, differential rotation or a magneto-rotational instability. However, as recent si ... more

Views: 162