{"id":2236,"date":"2024-11-18T14:36:20","date_gmt":"2024-11-18T13:36:20","guid":{"rendered":"https:\/\/pepsi.aip.de\/?p=2236"},"modified":"2024-11-18T14:36:20","modified_gmt":"2024-11-18T13:36:20","slug":"pepsis-non-detection-of-escaping-hydrogen-and-metal-lines-adds-to-the-enigma-of-wasp-12b","status":"publish","type":"post","link":"https:\/\/pepsi.aip.de\/?p=2236","title":{"rendered":"PEPSI\u2019s non-detection of escaping hydrogen and metal lines adds to the enigma of WASP-12b"},"content":{"rendered":"\n

WASP-12 b is an ultra-hot Jupiter (UHJ) of special interest for atmospheric studies since it is on an inspiraling orbit in an extreme environment of intense radiation and circumstellar gas. Previously claimed detections of active mass loss from this planet are controversial across the literature. To address this controversy, we obtained two new transit observations of WASP-12 b with the optical high-resolution PEPSI spectrograph on the Large Binocular Telescope. Contrary to previous work, we do not observe planetary H\ud835\udefc absorption and rule out the amplitude of previously reported detections. Our non-detection may be limited by the sensitivity of our data or could indicate weaker mass loss than suggested by previous studies. We conclude that previous claims of H\ud835\udefc absorption from the atmosphere of WASP-12 b should be reevaluated. Given the anticipated line strength of Balmer\/optical features, observing the atmosphere of this faint target will require stacking more observations even with the largest telescope facilities available.<\/p>\n\n\n\n

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Non-detection of planetary atmospheric absorption around H\ud835\udefc line (6562.83 \u00c5) in Night 1 data. The top panel is the order-stitched, continuum normalized stellar spectra from the PEPSI pipeline where the colorbar represents flux after continuum normalization. The second panel is the spectra with the stellar component removed; red (values greater than zero) indicates excess emission while blue (values less than zero) indicates excess absorption. The third panel shows the spectra from the second panel after applying SYSREM. The fourth and bottom panel displays the difference between the second and third panels.<\/figcaption><\/figure>\n\n\n\n

Read more: Pai Asnodkar et al. 2024, MNRAS, 535, 1829<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

WASP-12 b is an ultra-hot Jupiter (UHJ) of special interest for atmospheric studies since it is on an inspiraling orbit in an extreme environment of intense radiation and circumstellar gas. Previously claimed detections of active mass loss from this planet are controversial across the literature. To address this controversy, we obtained two new transit observations … Continue reading PEPSI\u2019s non-detection of escaping hydrogen and metal lines adds to the enigma of WASP-12b<\/span> →<\/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-2236","post","type-post","status-publish","format-standard","hentry","category-publications"],"_links":{"self":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/2236","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=2236"}],"version-history":[{"count":1,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/2236\/revisions"}],"predecessor-version":[{"id":2237,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/2236\/revisions\/2237"}],"wp:attachment":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2236"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}