{"id":11377,"date":"2025-07-05T23:08:28","date_gmt":"2025-07-05T20:08:28","guid":{"rendered":"https:\/\/uni-mag.gr\/?p=11377"},"modified":"2025-07-07T23:22:08","modified_gmt":"2025-07-07T20:22:08","slug":"der-faden-der-giganten","status":"publish","type":"post","link":"https:\/\/www.uni-mag.gr\/de\/der-faden-der-giganten\/","title":{"rendered":"XMM-Newton"},"content":{"rendered":"\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\"><em>Beobachtungen der Galaxienhaufen A399 und A401 mit dem Satelliten XMM-Newton<\/em><\/h2>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p><em><span style=\"color: #6f0000;\"><strong>\u0399rini Sakelliou &amp; Trevor J. Ponman (2004), <em>Monthly Notices of the Royal Astronomical Society<\/em><\/strong><\/span><\/em><\/p>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"699\" src=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/Large-scale_structure_of_light_distribution_in_the_universe-2.jpg\" alt=\"\" class=\"wp-image-11373\" srcset=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/Large-scale_structure_of_light_distribution_in_the_universe-2.jpg 960w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/Large-scale_structure_of_light_distribution_in_the_universe-2-300x218.jpg 300w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/Large-scale_structure_of_light_distribution_in_the_universe-2-768x559.jpg 768w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/Large-scale_structure_of_light_distribution_in_the_universe-2-275x200.jpg 275w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/figure>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>Das kosmische Netz, das alles im Universum verbindet, ist ein riesiges Geflecht aus Gasen \u2013 haupts\u00e4chlich Wasserstoff \u2013 das als notwendiger Brennstoff f\u00fcr die Sternentstehung dient. Das Netz, das auf dem obigen Bild zu sehen ist, erinnert an ein Spinnennetz. In der Abbildung erscheinen die Sterne gelb, und aus ihnen entstehen sp\u00e4ter Galaxien. Die gesamte Materie im Universum verteilt sich entlang langer Filamente. Entlang dieser F\u00e4den entstehen alle Sterne, Galaxien, Galaxienhaufen und Superhaufen.     <\/p>\n\n<p>Wenn man das Bild betrachtet, kann man \u2013 nicht zu Unrecht \u2013 den Eindruck gewinnen, dass einige intensiv gelbe, fast kreisf\u00f6rmige Strukturen Galaxienhaufen mit vielen Galaxien darstellen. Diese \u201egelben\u201c Haufen k\u00f6nnten kurz vor einer Kollision stehen. <\/p>\n\n<p>Ein Galaxienhaufen strahlt im R\u00f6ntgenbereich. Die beste Methode, seine Geheimnisse zu enth\u00fcllen, ist daher m\u00f6glicherweise die Beobachtung im R\u00f6ntgenlicht. Der europ\u00e4ische R\u00f6ntgensatellit XMM-Newton f\u00fchrte vier Beobachtungen entlang der Linie durch, die die beiden Haufen A399 und A401 verbindet. Diese beiden Galaxienhaufen sind etwa eine Milliarde Lichtjahre von uns entfernt und etwa 40 Bogenminuten (entspricht 3,2 Mpc) voneinander entfernt. Das Sichtfeld des Satelliten XMM-Newton ist kreisf\u00f6rmig und ungef\u00e4hr so gro\u00df wie der Vollmond.    <\/p>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"240\" height=\"210\" src=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/images.jpg\" alt=\"\" class=\"wp-image-11484\" srcset=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/images.jpg 240w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/images-229x200.jpg 229w\" sizes=\"auto, (max-width: 240px) 100vw, 240px\" \/><\/figure>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>Jeder Haufen hinterl\u00e4sst auf dem R\u00f6ntgenbild einen deutlichen dunklen \u201eFleck\u201c. Im Folgenden ist das zusammengesetzte Bild zu sehen, das aus allen vier Beobachtungen erstellt wurde. <\/p>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"457\" src=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/m_351-4-1439-fig001.gif\" alt=\"\" class=\"wp-image-11488\"\/><\/figure>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>Nach der Auswertung aller vier Datens\u00e4tze erstellten wir dieses Bild, das wir zusammen mit den Ergebnissen unserer Studie in den <em>Monthly Notices of the Royal Astronomical Society<\/em> ver\u00f6ffentlichten. Wir stellten fest, dass sich die beiden Galaxienhaufen im Anfangsstadium einer Kollision befinden \u2013 vor einer endg\u00fcltigen Verschmelzung zu einem gro\u00dfen Superhaufen.<\/p>\n\n<p>Die oben genannten Beobachtungen wurden mit dem R\u00f6ntgensatelliten XMM-Newton durchgef\u00fchrt, der auf dem n\u00e4chsten Bild zu sehen ist. Er ist etwa 10 Meter lang und wiegt ungef\u00e4hr 3 Tonnen. <\/p>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"360\" src=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/XMM-Newton_spacecraft_model.png\" alt=\"\" class=\"wp-image-11492\" srcset=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/XMM-Newton_spacecraft_model.png 960w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/XMM-Newton_spacecraft_model-300x113.png 300w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/07\/XMM-Newton_spacecraft_model-768x288.png 768w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/figure>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>Eine Simulation der Kollision zweier Galaxienhaufen ist in den folgenden Videos zu sehen:<\/p>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Abell 1758 galaxy cluster merger simulation: temperature\" width=\"640\" height=\"480\" src=\"https:\/\/www.youtube.com\/embed\/8loOt892VJQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Large Scale Structure of the Universe from a Cosmic Simulation\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/YjUICiYlCYE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>Die endg\u00fcltige Ver\u00f6ffentlichung findest du hier: <a href=\"https:\/\/academic.oup.com\/mnras\/article\/351\/4\/1439\/1135465?login=false\">https:\/\/academic.oup.com\/mnras\/article\/351\/4\/1439\/1135465<\/a><\/p>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p class=\"card-text\">Eine kosmische Gasbr\u00fccke verbindet zwei riesige Galaxienhaufen, A399 und A401. Mit Hilfe des Satelliten XMM-Newton enth\u00fcllen Wissenschaftler ihre verborgene Wechselwirkung \u2013 der Anfang einer galaktischen Kollision.  [&#8230;]<\/p>\n<p class=\"m-0\"><a class=\"btn btn-outline-secondary btn-read-more\" href=\"https:\/\/www.uni-mag.gr\/de\/der-faden-der-giganten\/\">Read More<\/a><\/p>\n","protected":false},"author":3,"featured_media":11375,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[765,2888,801],"tags":[2941,2942,1875,1569,2943,2939,2946,2945,2944,1570,2940],"class_list":["post-11377","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-issues-de","category-issue-13-de","category-was-ist-es","tag-a399-de","tag-a401-de","tag-astrophysik","tag-galaxienhaufen","tag-galaxienhaufen-de","tag-kosmisches-netz","tag-monthly-notices-of-the-royal-astronomical-society-de","tag-satellitenbeobachtungen","tag-superhaufen","tag-x-strahlen","tag-xmm-newton-de"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ 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