{"id":1920,"date":"2022-04-05T10:19:43","date_gmt":"2022-04-05T09:19:43","guid":{"rendered":"https:\/\/pepsi.aip.de\/?p=1920"},"modified":"2022-05-23T10:04:18","modified_gmt":"2022-05-23T09:04:18","slug":"the-pepsi-exoplanet-transit-survey-pets-i-investigating-the-presence-of-a-silicate-atmosphere-on-the-super-earth-55-cnc-e","status":"publish","type":"post","link":"https:\/\/pepsi.aip.de\/?p=1920","title":{"rendered":"The PEPSI exoplanet transit survey (PETS) I: Investigating the presence of a silicate atmosphere on the super-earth 55 Cnc e"},"content":{"rendered":"\n

The study of exoplanets and especially their atmospheres can reveal key insights on their evolution by <\/span>identifying<\/span> specific<\/span> atmospheric<\/span> species.<\/span> For<\/span> such<\/span> a<\/span>tmospheric<\/span> investigations,<\/span> high<\/span>–<\/span>resolution <\/span>transmission spectroscopy has shown great success, especially for Jupiter<\/span>–<\/span>type planets. Towards the <\/span>atmospheric characterization of smaller planets, the super<\/span>–<\/span>Earth exoplanet 55 Cnc e is one of the most <\/span>promising<\/span> terrestrial exoplanets studied to date. Here, we present a high<\/span>–<\/span>resolution spectroscopic <\/span>transit observation of this planet, acquired with the PEPSI instrument at the Large Binocular Telescope. <\/span>Assuming the presence of Earth<\/span>–<\/span>like crust species on the surfa<\/span>ce of 55 Cnc e, from which a possible <\/span>silicate<\/span>–<\/span>vapor atmosphere could have originated, we search in its transmission spectrum for absorption <\/span>of various atomic and ionized species such as Fe , Fe<\/span> +<\/span><\/sup>, Ca , Ca<\/span> +<\/span><\/sup>, Mg and K , among others. Not finding <\/span>absorption<\/span> for any of the investigated species, we are able to set absorption limits with a median value <\/span>of 1.9 \u00d7 R<\/span>P<\/span><\/sub>. In conclusion, we do not find evidence of a widely extended silicate envelope on this super<\/span>–<\/span>Earth reaching several planetary radii.<\/span><\/span><\/p>\n

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2D maps of the residual spectra at different orbital phases in the velocity range for strong opacity bearing species i.e. Mg I (top), H beta, and K I (center) and Ca II (bottom). The color bar shows the residual Flux in %. The dashed black line shows the expected absorption trace.<\/figcaption><\/figure>\n

Read more: Keles et al. 2022, MNRAS, 513, 1544<\/a><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

The study of exoplanets and especially their atmospheres can reveal key insights on their evolution by identifying specific atmospheric species. For such atmospheric investigations, high–resolution transmission spectroscopy has shown great success, especially for Jupiter–type planets. Towards the atmospheric characterization of smaller planets, the super–Earth exoplanet 55 Cnc e is one of the most promising terrestrial … Continue reading The PEPSI exoplanet transit survey (PETS) I: Investigating the presence of a silicate atmosphere on the super-earth 55 Cnc e<\/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-1920","post","type-post","status-publish","format-standard","hentry","category-publications"],"_links":{"self":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/1920","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=1920"}],"version-history":[{"count":4,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/1920\/revisions"}],"predecessor-version":[{"id":1933,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/1920\/revisions\/1933"}],"wp:attachment":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1920"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1920"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1920"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}