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Category/Subcategory: Natural Sciences/Astronomy

Validating Spherical Born Kernels for Meridional Flows

Author: Vincent Böning
We present the current status of an undergoing validation of a recently developed model for computing spherical Born approximation sensitivity functions for flows. In a first step, power spectra and reference cross-correlations fr ... more

Views: 509

SIGS - Seismic Inferences for Glitches in Stars

Author: Filipe Pereira
A new set of codes, to become publicly available, are presented. These use the frequencies of oscillation of solar-type stars, together with some of the stellar atmospheric parameters, to automatically measure and characterize aco ... more

Views: 358

Evolutionary states of red-giants stars: how to obtained them from “short” time series data from K2 and Tess

Author: Saskia Hekker
From its surface it can be difficult to determine whether a red-giant star is in its Helium-core-burning phase or only burning Hydrogen in a shell around an inert Helium core. Stars in either of these stage can have simi ... more

Views: 429

Forecasting the arrival of Coronal Mass Ejections: The Drag-Based Model

Author: Bojan Vrsnak
We present a new space weather online forecast-tool for predicting the arrival of Interplanetary Coronal Mass Ejections (ICMEs). The forecast-tool is based on the “Drag-Based Model” (DBM), developed in the frame of the Europea ... more

Views: 770

Evolution of photospheric pores in the magnetic field

Author: Ivan Dorotovic
We describe conditions of pore formation in relation to the configuration and intensity of magnetic field. We used observations of the SDO/HMI instrument, which observes the photosphere in continuum and simultaneously the magnetic ... more

Views: 477

The Broad Band Imager for EST

Author: MATTEO Munari
The BBI (Broad Band Imager) for EST will be one of the 'first light' instruments of the telescope. The scientific objectives will be the the study of fundamental astrophysical processes at their intrinsic scales in the Sun's atmos ... more

Views: 22

20 Years of GONG: p Mode Parameters and the Solar Cycle

Author: René Kiefer
The properties of solar acoustic oscillations are known to vary with the solar cycle. With 20 years of continuous observations by GONG, we are now in the position to carry out a comparison of the variation of the p mode parameters ... more

Views: 420

Comparison of damping mechanisms for transverse waves in coronal loops.

Damping of transverse waves in different solar coronal structures is a commonly observed property and a source of information about coronal conditions. Although resonant damping seems to be the most accepted mechanism for dampi ... more

Views: 1377

16CygA&B and Kepler Legacy values : Differences between the values of frequencies by different fitters

Author: Ian Roxburgh
The differences between the oscillation frequencies and uncertainty estimates of a star derived by different fitters can be large, sufficiently large so that, were one to find a stellar model that fitted one frequency set ($\chi^ ... more

Views: 899

Exploitation of Space Data for Innovative Helio- and Asteroseismology - SpaceInn

Author: Markus Roth
The European Helio- and Asteroseismology Network (HELAS) has initiated the follow-up project "SpaceInn - Exploitation of Space Data for Innovative Helio- and Asteroseismolgoy" with the mission to build on the existing European str ... more

Views: 633