Author: Vincent BöningWe extend an existing Born approximation model for calculating the linear sensitivity of helioseismic
travel-times to flows from Cartesian to spherical geometry. This development is necessary to use the
Born approximation for in ... more
Author: Michael BurtonWorkshop poster for "Celebrating Mopra: looking to the future", held at the University of New South Wales in Sydney on Dec 9-11, 2015. Also including a workshop on the JCMT and the East Asia Observatory.
Author: Birgitta NordstromExtremely metal-poor (EMP) halo stars with [Fe/H] below ~ -3 are considered to be fossil records of conditions in the early halo. In the naïve picture in which iron is a proxy for overall metallicity and indirectly for time, EMP ... more
Author: Solarnet - High Resolution Solar Physics NetworkAs a part of the SOLARNET project, the Transnational Access and Service Programme supports
the access of the European solar physics community to some of the best European telescopes.
To enhance the efficiency of data usage, exte ... more
Author: Pavol SchwartzAn active-region filament in the active region NOAA 12159 (at solar disk coordinates [x,y] = [225,-440] arcsec) was observed with the Vacuum Tower Telescope at Tenerife on 11 September 2014. Full-Stokes spectropolarimetric observa ... more
Author: Oskar von der LüheThe combination of adaptive optics with post processing of sequences of short exposures is a very successful technique to produce diffraction limited images of the solar photosphere throughout the visible spectral domain. Viable a ... more
Author: Francesca ZuccarelloDuring solar flares, magnetic energy can be converted into electromagnetic radiation from radio waves to gamma rays. In the most energetic events, enhancements in the continuum at visible wavelengths may be present (white-light [W ... more
Author: Mathieu VrardThe Kepler space mission has observed many solar-like pulsators, and helped to decipher their main characteristics (e.g: mass, radius, rotation). Most of the achievements recently obtained in that domain consist of the analysis of ... more
Author: Markus RothHELAS had the major objective to bring together the widely dispersed European research groups active in helio- and asteroseismology. The transfer of knowledge and data analysis techniques through HELAS lead to a structuring of thi ... more
Author: Markus RothThe objective of the European Helio- and Asteroseismology Network (HELAS) is to coordinate the activities of the European activities in helio- and asteroseismology.
HELAS was funded as Coordination Action under the European Uni ... more