{"id":224953,"date":"2025-11-12T09:12:36","date_gmt":"2025-11-12T15:12:36","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2025\/11\/astronomers-discover-new-pulsating-ultraluminous-x-ray-source"},"modified":"2025-11-12T09:12:36","modified_gmt":"2025-11-12T15:12:36","slug":"astronomers-discover-new-pulsating-ultraluminous-x-ray-source","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2025\/11\/astronomers-discover-new-pulsating-ultraluminous-x-ray-source","title":{"rendered":"Astronomers discover new pulsating ultraluminous X-ray source"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/astronomers-discover-new-pulsating-ultraluminous-x-ray-source.jpg\"><\/a><\/p>\n<p>Using ESA\u2019s XMM-Newton satellite, European astronomers have observed ultraluminous X-ray sources (ULXs) in the galaxy NGC 4631. As a result, they detected a new pulsating ULX, which received the designation X-8. The research is <a href=\"https:\/\/arxiv.org\/abs\/2511.04282\" target=\"_blank\">published<\/a> November 6 on the <i>arXiv<\/i> preprint server.<\/p>\n<p>ULXs are point sources in the sky that are so bright in X-rays that each emits more radiation than a million suns emit at all wavelengths. They are less luminous than <a href=\"https:\/\/phys.org\/tags\/active+galactic+nuclei\/\" rel=\"tag\" class=\"\">active galactic nuclei<\/a>, but more consistently luminous than any known stellar process. Although numerous studies of ULXs have been conducted, the basic nature of these sources still remains unknown.<\/p>\n<p>Some persistent ULXs exhibit pulsations and therefore are categorized as ultraluminous X-ray pulsars (ULXPs). Discovering and studying objects of this type could be crucial for advancing our understanding of accretion physics\u2014for instance, mechanisms that enable the sustained X-ray luminosities of ULXs which exceed the Eddington limit.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Using ESA\u2019s XMM-Newton satellite, European astronomers have observed ultraluminous X-ray sources (ULXs) in the galaxy NGC 4631. As a result, they detected a new pulsating ULX, which received the designation X-8. The research is published November 6 on the arXiv preprint server. ULXs are point sources in the sky that are so bright in X-rays [\u2026]<\/p>\n","protected":false},"author":662,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[219,8],"tags":[],"class_list":["post-224953","post","type-post","status-publish","format-standard","hentry","category-physics","category-space"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/224953","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/662"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=224953"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/224953\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=224953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=224953"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=224953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}