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University of Graz News Im Brennpunkt der Sonnenforschung

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Thursday, 28 July 2016

Im Brennpunkt der Sonnenforschung

Der NASA-Satellit RHESSI misst die Strahlung bei Sonnenausbrüchen. PhysikerInnen aus aller Welt präsentieren diese Woche in Graz ihre neuesten Forschungsergebnisse dazu. Foto: NASA

Der NASA-Satellit RHESSI misst die Strahlung bei Sonnenausbrüchen. PhysikerInnen aus aller Welt präsentieren diese Woche in Graz ihre neuesten Forschungsergebnisse dazu. Foto: NASA

Tagung zu Strahlungsausbrüchen erstmals in Österreich

Die Uni Graz ist diese Woche im Zentrum der Sonnenforschung: 80 AstrophysikerInnen aus 16 Ländern tauschen ihre neuesten Erkenntnisse über Strahlungsausbrüche – so genannte Flares – der Sonne aus. Das zentrale Thema dieses 15. RHESSI-Workshops, der heuer erstmals in Österreich stattfindet, ist die Röntgen- und Gammastrahlung, die der NASA-Satellit RHESSI (Ramaty High Energy Solar Spectroscopic Imager) misst. „Strahlungsausbrüche treten oft in Zusammenhang mit koronalen Massenauswürfen und Sonnenstürmen auf, und zählen zu den stärksten Explosionen in unserem Sonnensystem“, erklärt Tagungsorganisatorin Astrid Veronig vom Institut für Physik der Uni Graz. Bei solchen Ausbrüchen emittieren beschleunigte Elektronen und Ionen die hochenergetische Strahlung, die der RHESSI-Satellit seit 2002 misst.

Viele der aktuellen Forschungsthemen, die auf dieser Tagung diskutiert werden, dienen bereits zur Vorbereitung auf die bahnbrechende Solar Orbiter Mission der Europäischen Weltraumbehörde ESA, die im Oktober 2018 starten wird. Solar Orbiter wird dabei näher zur Sonne fliegen als jede bisherige Mission, und die Sonne von einer Umlaufbahn innerhalb der des innersten Planeten Merkur mit bisher unerreichter Auflösung beobachten. Die Wissenschaftssoftware für das Röntgenteleskop STIX auf Solar Orbiter wird unter Federführung der von Veronig geleiteten Arbeitsgruppe Astrophysik der Uni Graz entwickelt. Das Teleskop selbst wird unter Schweizer Leitung gebaut.

created by Dagmar Eklaude & Astrid Veronig

Related news

Jurassic Sounds: Biologist reconstructs insect songs from 165 million years ago

It was apparently not just the roars of the dinosaurs that made up the soundscape of the animal world during the Jurassic period. Crickets and grasshoppers communicated through a variety of songs and high-pitched sounds, as Thorin Jonsson from the Institute of Biology at the University of Graz discovered together with colleagues from the universities of Lincoln, Bristol (UK), Beijing (China) and Tempe (USA). The findings on what are so far the oldest traces of sound on Earth have just been published in the journal PNAS.

EU funding boosts international exchange between universities

The University of Graz is further expanding its international study opportunities through the European university alliance Arqus and is taking the lead in two key projects. In future, students will benefit from even more joint degree programmes and from simplified recognition of academic achievements through the Joint European Degree Label.

Rescue and risks: Researchers have surveyed public perceptions of AI

The use of artificial intelligence has had to be made transparent since 2 August 2026. The EU’s AI Act, which has been in force since then, also sets out how risky an application is and which security measures apply as a result. However, the assessment of risks by the legislation differs in some cases significantly from the perceptions of the Austrian public. This is the finding of a representative study carried out by data scientist Stefan Thalmann from the University of Graz and his team.

The Healing Sea: Researchers discover new approaches to treating chronic inflammation in sponges

Chronic inflammation plays a key role in many diseases, ranging from metabolic disorders and cardiovascular diseases to tissue damage following injuries or infections. “Normally, the body is able to resolve inflammation on its own. If this process becomes unbalanced, immune cells remain permanently active and continue to drive negative changes in the tissue,” explains Andreas Koeberle, a pharmacist at the University of Graz.

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