H2020Индивидуална стипендия2021–2023

ELISITY · fiEld Line helIcity and Solar eruptivITY

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2021-03-01 → 2023-02-28
Финансиране от ЕС: 165 085 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Слънчевата магнитна хелицитетност изследва геометрията на магнитните полета при слънчеви изригвания и вспышки. Разбирането на тези процеси помага за по-доброто прогнозиране на космическото време и неговото влияние върху технологиите на Земята.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

fiEld Line helIcity and Solar eruptivITY

The Sun, although responsible for maintaining life on Earth, it often exhibits explosive behaviour which may have important consequences on our planet. Solar eruptivity consists of solar flares, intense, localized electromagnetic bursts, and Coronal Mass Ejections (CMEs), expulsions of magnetized solar plasma to the interplanetary space. When solar radiation, magnetic fields and particles hit Earth, they affect its space environment and can cause damages to human technology, and even life. Predicting solar activity and its effects, Space Weather in short, is thus very important, with a lot of effort being put into this direction. It is well known that solar activity is of magnetic origin. The constant photospheric motions twist and tangle the magnetic field lines, resulting in the build up of energy into the magnetic field. Once this gets distorted enough it can experience a sudden rearrangement of its topology, known as magnetic reconnection, which releases the stored energy in an explosive manner. A quantity that can measure the geometrical complexity of a magnetic field is magnetic helicity, which, moreover, is conserved in ideal magneto-hydrodynamic (MHD), the theoretical description of the solar atmosphere. A proxy for the density of relative magnetic helicity, the appropriate helicity in the case of the Sun, is relative field line helicity (RFLH), a quantity that can highlight the locations where helicity is more important. Before the start of this project, studies of RFLH were mostly restricted to approximations and/or MHD simulations of the Sun. The main goal of this project was thus to study in detail the behaviour of RFLH in solar active regions (ARs) during the production and early stages of solar eruptions. Additionally, to determine whether RFLH could be used to define quantities which indicate solar eruptivity.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The research project ‘fiEld Line helIcity and Solar eruptivITY’ (ELISITY) will examine the reasons behind the eruptive behaviour of the Sun, and the possibility of forecasting it. The importance of the project stems from the relation of solar eruptivity to Space Weather, and the international effort put in predicting the latter. ELISITY will study the behaviour of the minimally-explored physical quantity field line helicity (FLH) during the production and early stages of solar eruptions. FLH is a proxy for the density of helicity that offers new and important capabilities in the study of solar eruptivity, since it contains the same information with magnetic helicity, the conserved in ideal magneto-hydrodynamics quantity that describes the complexity of a magnetic field, and in addition, it provides information for the locations where helicity is more important. ELISITY will also determine parameters related to the spatial distribution of FLH that indicate eruptivity, and conditions on these parameters for solar eruptions to occur. For these, ELISITY will select observational cases which exhibit different levels of activity and morphology, using existing data from solar missions. The project will accurately compute FLH based on the researcher’s recent developments on the topic. The host institute will provide all required infrastructure and services to assist the researcher, and the supervision by very experienced staff. The project will have a positive impact to all parts involved: the researcher will gain new research skills in using solar observations, and also teaching experience, while the research team of the host will gain on state-of-the-art helicity and FLH computation methods. The potentially ground breaking project results will be disseminated with the publication of scientific articles to peer-reviewed journals, and their presentation to scientific conferences; they will also be communicated to the general public with outreach activities.

Оригинален текст от CORDIS (на английски).

Участници

PANEPISTIMIO IOANNINON · IOANNINAКоординаторГърция