{"id":98,"date":"2016-11-10T10:13:07","date_gmt":"2016-11-10T09:13:07","guid":{"rendered":"https:\/\/sites-lira.obspm.fr\/helisol\/?p=98"},"modified":"2016-11-24T10:31:22","modified_gmt":"2016-11-24T09:31:22","slug":"soumission-dun-article-concernant-lutilisation-de-lhelicite-en-tant-que-diagnostic-deruptivite-solaire","status":"publish","type":"post","link":"https:\/\/sites-lira.obspm.fr\/helisol\/2016\/11\/10\/soumission-dun-article-concernant-lutilisation-de-lhelicite-en-tant-que-diagnostic-deruptivite-solaire\/","title":{"rendered":"Soumission d&rsquo;un article concernant l&rsquo;utilisation de l&rsquo;h\u00e9licit\u00e9 en tant que diagnostic d&rsquo;\u00e9ruptivit\u00e9 solaire"},"content":{"rendered":"<p>Un nouvel article li\u00e9 au projet H\u00e9liSol vient d&rsquo;\u00eatre soumis au journal Astronomy &amp; Astrophysics. Cet article intitul\u00e9 \u00ab\u00a0Magnetic Helicity as a diagnostic of solar eruptivity\u00a0\u00bb peut \u00eatre <a href=\"https:\/\/sites-lira.obspm.fr\/helisol\/files\/2016\/11\/Helicity_FE_erupt_2col.pdf\">t\u00e9l\u00e9charg\u00e9 ici (version pdf)<\/a>. Cette \u00e9tude est co-sign\u00e9e par \u00c9tienne Pariat, James Leake, Gherardo Valori, Mark Linton, Francesco Zuccarello &amp; K\u00e9vin Dalmasse.<\/p>\n<p>Dans cet article nous utilisons des simulations param\u00e9triques de James Leake (travaillant au Naval Research Laboratory, Washington DC, USA) d&rsquo;\u00e9mergence du champ magn\u00e9tique dans la couronne solaire. En fonction des param\u00e8tres utilis\u00e9s dans la simulation, celle-ci aboutissent ou non \u00e0 des \u00e9ruptions, avec l&rsquo;\u00e9jection de structures magn\u00e9tiques.<\/p>\n<p>En analysant plusieurs grandeurs physiques dans chacune de ses simulations nous \u00e9tudions lesquelles pr\u00e9sentent des diff\u00e9rences marqu\u00e9s entre simulations \u00e9ruptives et non-\u00e9ruptives. Nous montrons que l&rsquo;h\u00e9licit\u00e9 magn\u00e9tique pr\u00e9sente justement des diff\u00e9rences tr\u00e8s marqu\u00e9es entres les simulations, contrairement aux diff\u00e9rentes quantit\u00e9s bas\u00e9es sur le flux ou l&rsquo;\u00e9nergie magn\u00e9tique.<\/p>\n<p>Nous mettons en avant une quantit\u00e9 d\u00e9riv\u00e9e de l&rsquo;h\u00e9licit\u00e9 magn\u00e9tique, qui pr\u00e9sente des valeurs tr\u00e8s importante pour les simulations \u00e9ruptives uniquement et ce bien avant l&rsquo;\u00e9ruption m\u00eame. Cette quantit\u00e9 pourrait donc \u00eatre particuli\u00e8rement utile pour pr\u00e9dire les \u00e9ruptions solaires en amont de leur d\u00e9clenchement. Reste \u00e0 tester cette quantit\u00e9 sur des donn\u00e9es d&rsquo;observations solaires.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un nouvel article li\u00e9 au projet H\u00e9liSol vient d&rsquo;\u00eatre soumis au journal Astronomy &amp; Astrophysics. Cet article intitul\u00e9 \u00ab\u00a0Magnetic Helicity as a diagnostic of solar eruptivity\u00a0\u00bb peut \u00eatre t\u00e9l\u00e9charg\u00e9 ici (version pdf). Cette \u00e9tude est co-sign\u00e9e par \u00c9tienne Pariat, James &hellip; <a href=\"https:\/\/sites-lira.obspm.fr\/helisol\/2016\/11\/10\/soumission-dun-article-concernant-lutilisation-de-lhelicite-en-tant-que-diagnostic-deruptivite-solaire\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-98","post","type-post","status-publish","format-standard","hentry","category-articles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Soumission d&#039;un article concernant l&#039;utilisation de l&#039;h\u00e9licit\u00e9 en tant que diagnostic d&#039;\u00e9ruptivit\u00e9 solaire - HeliSol<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sites-lira.obspm.fr\/helisol\/2016\/11\/10\/soumission-dun-article-concernant-lutilisation-de-lhelicite-en-tant-que-diagnostic-deruptivite-solaire\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Soumission d&#039;un article concernant l&#039;utilisation de l&#039;h\u00e9licit\u00e9 en tant que diagnostic d&#039;\u00e9ruptivit\u00e9 solaire - HeliSol\" \/>\n<meta property=\"og:description\" content=\"Un nouvel article li\u00e9 au projet H\u00e9liSol vient d&rsquo;\u00eatre soumis au journal Astronomy &amp; Astrophysics. Cet article intitul\u00e9 \u00ab\u00a0Magnetic Helicity as a diagnostic of solar eruptivity\u00a0\u00bb peut \u00eatre t\u00e9l\u00e9charg\u00e9 ici (version pdf). 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