{"id":134431,"date":"2022-01-20T21:23:25","date_gmt":"2022-01-21T05:23:25","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2022\/01\/cosmic-birefringence-from-planck-data-release-4"},"modified":"2022-01-20T21:23:25","modified_gmt":"2022-01-21T05:23:25","slug":"cosmic-birefringence-from-planck-data-release-4","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2022\/01\/cosmic-birefringence-from-planck-data-release-4","title":{"rendered":"Cosmic Birefringence from Planck Data Release 4"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/cosmic-birefringence-from-planck-data-release-4.jpg\"><\/a><\/p>\n<p>We search for the signature of parity-violating physics in the cosmic microwave background, called cosmic birefringence, using the Planck data release 4. We initially find a birefringence angle of \u03b2=0.30\u00b10.11 (68% C.L.) for nearly full-sky data. The values of \u03b2 decrease as we enlarge the Galactic mask, which can be interpreted as the effect of polarized foreground emission. Two independent ways to model this effect are used to mitigate the systematic impact on \u03b2 for differen\u2026 See more.<\/p>\n<hr>\n<p>We search for the signature of parity-violating physics in the cosmic.<\/p>\n<p>Microwave background, called cosmic birefringence, using the Planck data.<br \/> release 4. We initially find a birefringence angle of $\\beta=0.30\\pm0.11$ (68%<\/p>\n<p>C.L.) for nearly full-sky data. The values of $\\beta$ decrease as we enlarge.<\/p>\n<p>The Galactic mask, which can be interpreted as the effect of polarized.<br \/> foreground emission. Two independent ways to model this effect are used to.<br \/> mitigate the systematic impact on $\\beta$ for different sky fractions. We.<br \/> choose not to assign cosmological significance to the measured value of $\\beta$<\/p>\n<p>Until we improve our knowledge of the foreground polarization.<\/p>\n<div class=\"more-link-wrapper\"> <a class=\"more-link\" href=\"https:\/\/lifeboat.com\/blog\/2022\/01\/cosmic-birefringence-from-planck-data-release-4\">Continue reading \u201cCosmic Birefringence from Planck Data Release 4\u201d | &gt;<\/a><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"<p>We search for the signature of parity-violating physics in the cosmic microwave background, called cosmic birefringence, using the Planck data release 4. We initially find a birefringence angle of \u03b2=0.30\u00b10.11 (68% C.L.) for nearly full-sky data. The values of \u03b2 decrease as we enlarge the Galactic mask, which can be interpreted as the effect of [\u2026]<\/p>\n","protected":false},"author":359,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[219,8],"tags":[],"class_list":["post-134431","post","type-post","status-publish","format-standard","hentry","category-physics","category-space"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/134431","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\/359"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=134431"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/134431\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=134431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=134431"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=134431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}