{"id":153234,"date":"2022-12-19T19:28:22","date_gmt":"2022-12-20T01:28:22","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2022\/12\/astronomers-discover-irregularities-in-the-cores-of-red-giants"},"modified":"2022-12-19T19:28:22","modified_gmt":"2022-12-20T01:28:22","slug":"astronomers-discover-irregularities-in-the-cores-of-red-giants","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2022\/12\/astronomers-discover-irregularities-in-the-cores-of-red-giants","title":{"rendered":"Astronomers discover irregularities in the cores of red giants"},"content":{"rendered":"<p><\/p>\n<p><iframe style=\"display: block; margin: 0 auto; width: 100%; aspect-ratio: 4\/3; object-fit: contain;\" src=\"https:\/\/www.youtube.com\/embed\/pvQ6Z9ci9ik?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope;\n   picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p>Red giants are dying stars, in advanced stages of stellar evolution, which have depleted the hydrogen in their cores. In a study published today in <i>Nature Communications<\/i>, a team of astronomers mainly from Instituto de Astrof\u00edsica e Ci\u00eancias do Espa\u00e7o (IA), have found new evidence that red giant stars experience \u201cglitches\u201d\u2014sharp structural variations\u2014in their inner core.<\/p>\n<p>Unfortunately, it is impossible to look directly inside a star. However, a technique dubbed asteroseismology, which measures oscillations similar to \u201cearthquakes\u201d in stars, can provide indirect glimpses of stellar interiors. The \u201cglitches\u201d can affect these oscillations, or the frequencies and paths of gravity and <a href=\"https:\/\/phys.org\/tags\/sound+waves\/\" rel=\"tag\" class=\"\">sound waves<\/a> traveling through the stellar interior.<\/p>\n<p>As IA researcher Margarida Cunha explains, \u201cWaves propagating inside stars induce minute stellar brightness variations that can be detected with highly precise space-based instruments. These waves reveal the conditions of the medium where they propagate, which is to say, the physical properties of the stellar interiors.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Red giants are dying stars, in advanced stages of stellar evolution, which have depleted the hydrogen in their cores. In a study published today in Nature Communications, a team of astronomers mainly from Instituto de Astrof\u00edsica e Ci\u00eancias do Espa\u00e7o (IA), have found new evidence that red giant stars experience \u201cglitches\u201d\u2014sharp structural variations\u2014in their inner [\u2026]<\/p>\n","protected":false},"author":661,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[],"class_list":["post-153234","post","type-post","status-publish","format-standard","hentry","category-cosmology"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/153234","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\/661"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=153234"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/153234\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=153234"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=153234"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=153234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}