{"id":1505,"date":"2020-05-01T12:51:42","date_gmt":"2020-05-01T11:51:42","guid":{"rendered":"https:\/\/pepsi.aip.de\/?p=1505"},"modified":"2020-10-01T13:01:06","modified_gmt":"2020-10-01T12:01:06","slug":"no-consistent-atmospheric-absorption-detected-for-the-ultra-hot-jupiter-wasp-189b","status":"publish","type":"post","link":"https:\/\/pepsi.aip.de\/?p=1505","title":{"rendered":"No Consistent Atmospheric Absorption Detected for the Ultra-hot Jupiter WASP-189b"},"content":{"rendered":"\n<p>We observed a partial transit of the ultra-hot Jupiter WASP-189 b with PEPSI on the LBT. We detect a highly variable transit signal in multiple atomic transitions, including H-alpha, Fe I, and Mg I. The signal is not consistent with a transiting planetary atmosphere. We suggest instead that the in-transit signal is due to an inhomogeneous stellar surface. Our observations demonstrate the lack of a highly extended atmosphere in common optical atomic tracers. Although WASP-189 is very bright, atmospheric characterization of the planet will be difficult due to the small transit depth and apparently compact atmosphere.<\/p>\n<p>\u00a0<\/p>\n<figure id=\"attachment_1504\" aria-describedby=\"caption-attachment-1504\" style=\"width: 1887px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1504 size-full\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2020\/10\/rnaasab88dcf1_hr.jpg\" alt=\"\" width=\"1887\" height=\"1219\" srcset=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2020\/10\/rnaasab88dcf1_hr.jpg 1887w, https:\/\/pepsi.aip.de\/wp-content\/uploads\/2020\/10\/rnaasab88dcf1_hr-300x194.jpg 300w, https:\/\/pepsi.aip.de\/wp-content\/uploads\/2020\/10\/rnaasab88dcf1_hr-1024x662.jpg 1024w, https:\/\/pepsi.aip.de\/wp-content\/uploads\/2020\/10\/rnaasab88dcf1_hr-768x496.jpg 768w, https:\/\/pepsi.aip.de\/wp-content\/uploads\/2020\/10\/rnaasab88dcf1_hr-1536x992.jpg 1536w\" sizes=\"auto, (max-width: 1887px) 100vw, 1887px\" \/><figcaption id=\"caption-attachment-1504\" class=\"wp-caption-text\">Average transmission spectra (left panels) and time series absorption (right panels) for the lines with detected absorption signatures. Note that the Mg I transmission spectrum is the average of all three triplet members. The vertical gray lines in the time series panels mark the transit contact points. Although there is some significant in-transit variability, no signal consistent with an extended atmosphere around the planet is detect.<\/figcaption><\/figure>\n<p>\u00a0<\/p>\n<p>Read more: <a href=\"https:\/\/arxiv.org\/pdf\/2004.06859.pdf\">Wilson et al. 2020, Research Notes of the AAS, Volume 4, Issue 4, id.53 <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>We observed a partial transit of the ultra-hot Jupiter WASP-189 b with PEPSI on the LBT. We detect a highly variable transit signal in multiple atomic transitions, including H-alpha, Fe I, and Mg I. The signal is not consistent with a transiting planetary atmosphere. We suggest instead that the in-transit signal is due to an &hellip; <a href=\"https:\/\/pepsi.aip.de\/?p=1505\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">No Consistent Atmospheric Absorption Detected for the Ultra-hot Jupiter WASP-189b<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1505","post","type-post","status-publish","format-standard","hentry","category-publications"],"_links":{"self":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/1505","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1505"}],"version-history":[{"count":1,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/1505\/revisions"}],"predecessor-version":[{"id":1506,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/1505\/revisions\/1506"}],"wp:attachment":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1505"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1505"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}