{"id":1862,"date":"2023-02-19T11:22:15","date_gmt":"2023-02-19T10:22:15","guid":{"rendered":"http:\/\/vega78astronomie.fr\/?p=1862"},"modified":"2023-02-19T11:22:15","modified_gmt":"2023-02-19T10:22:15","slug":"letoile-gamma-cassiopee-analyse-spectrale","status":"publish","type":"post","link":"https:\/\/vega78astronomie.fr\/index.php\/2023\/02\/19\/letoile-gamma-cassiopee-analyse-spectrale\/","title":{"rendered":"L&rsquo;\u00e9toile Gamma Cassiop\u00e9e : analyse spectrale"},"content":{"rendered":"\n<p>Gamma Cassiop\u00e9e est une \u00a0\u00e9toile Be, c\u2019est-\u00e0-dire \u00a0une \u00e9toile de type spectral B qui de plus montre des raies spectrales en \u00e9mission (hydrog\u00e8ne). <br>Les \u00e9toiles Be\u00a0 ont une tr\u00e8s grande vitesse de rotation (plusieurs centaines de km\/s \u00e0 l&rsquo;\u00e9quateur), et ont un disque autour d&rsquo;elles. Ce disque est responsable des raies en \u00e9mission (H alpha, H beta).<br>On note aussi la pr\u00e9sence la pr\u00e9sence de Fer et d\u2019H\u00e9lium dans le spectre.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/02\/Gam-Cas-B0.5IVe-2023-02-08-Notes.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"415\" src=\"http:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/02\/Gam-Cas-B0.5IVe-2023-02-08-Notes-1024x415.png\" alt=\"\" class=\"wp-image-1863\" srcset=\"https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/02\/Gam-Cas-B0.5IVe-2023-02-08-Notes-1024x415.png 1024w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/02\/Gam-Cas-B0.5IVe-2023-02-08-Notes-300x122.png 300w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/02\/Gam-Cas-B0.5IVe-2023-02-08-Notes-768x311.png 768w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/02\/Gam-Cas-B0.5IVe-2023-02-08-Notes-1536x622.png 1536w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/02\/Gam-Cas-B0.5IVe-2023-02-08-Notes-2048x830.png 2048w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/02\/Gam-Cas-B0.5IVe-2023-02-08-Notes-200x81.png 200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Spectre <em>r\u00e9alis\u00e9 le 8 f\u00e9vrier par Pascal Berteau \u00e0 l&rsquo;aide d&rsquo;un spectrographe <a href=\"https:\/\/spectro-uvex.tech\/\">UVEX4<\/a> mont\u00e9 sur un t\u00e9lecsope Ritchey-Chr\u00e9tien de 8 pouces<\/em><\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Gamma Cassiop\u00e9e est une \u00a0\u00e9toile Be, c\u2019est-\u00e0-dire \u00a0une \u00e9toile de type spectral B qui de plus montre des raies spectrales en \u00e9mission (hydrog\u00e8ne). Les \u00e9toiles Be\u00a0 ont une tr\u00e8s grande vitesse de rotation (plusieurs centaines de km\/s \u00e0 l&rsquo;\u00e9quateur), et ont un disque autour d&rsquo;elles. Ce disque est responsable des raies en \u00e9mission (H alpha, [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[49,48],"class_list":["post-1862","post","type-post","status-publish","format-standard","hentry","category-spectroscopie","tag-etoile","tag-spectre"],"_links":{"self":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/1862","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/comments?post=1862"}],"version-history":[{"count":2,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/1862\/revisions"}],"predecessor-version":[{"id":1865,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/1862\/revisions\/1865"}],"wp:attachment":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/media?parent=1862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/categories?post=1862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/tags?post=1862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}