{"id":367,"date":"2019-08-13T07:10:49","date_gmt":"2019-08-13T05:10:49","guid":{"rendered":"http:\/\/frantzmartinache.eu\/?p=367"},"modified":"2019-08-13T07:10:49","modified_gmt":"2019-08-13T05:10:49","slug":"kernel-publication-statistical-tests-for-high-contrast-detection-using-kernel-phase","status":"publish","type":"post","link":"https:\/\/frantzmartinache.eu\/index.php\/2019\/08\/13\/kernel-publication-statistical-tests-for-high-contrast-detection-using-kernel-phase\/","title":{"rendered":"KERNEL Publication: Statistical Tests for high-contrast detection using KERNEL-PHASE!"},"content":{"rendered":"\n

In this new publication, KERNEL team PhD student Alban Ceau and collaborators formulate new formal tools and techniques to determine the contrast detection limits for a planned JWST program designed to look for companions around ultracool Y-dwarfs.<\/p>\n\n\n\n

The paper notably introduces an operational test that turns out to be only marginally less powerful than the theoretical optimal (aka Neyman-Pearson) test. The operational test, applied to simulated JWST images of the NIRISS instrument expected to be representative of planned observations of faint Y-dwarfs suggests that companions of less than 1 Jupiter mass are well within the grasp of this observing mode.<\/p>\n\n\n\n

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Parameter estimation by the kernel-phase method for 10:1 contrast companions located inside or outside lambda\/D (~ 150 mas at the wavelength of the simulation). For super-resolved detections, the contrast ratio and the angular separation are strongly correlated: a behavior that is similar to what has been observed for closure-phase when using a non-redundant aperture mask. Beyond one resolution element, the interpretation of the data is unequivocal. <\/figcaption><\/figure>\n\n\n\n

Congratulations to Alban whose paper was accepted for publication by Astronomy & Astrophysics! The preprint version of the paper is available for download on the arXiv.org website: https:\/\/arxiv.org\/abs\/1908.03130<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

In this new publication, KERNEL team PhD student Alban Ceau and collaborators formulate new formal tools and techniques to determine the contrast detection limits for a planned JWST program designed to look for companions around ultracool Y-dwarfs. The paper notably introduces an operational test that turns out to be only marginally less powerful than the … Continue reading KERNEL Publication: Statistical Tests for high-contrast detection using KERNEL-PHASE!<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21,2],"tags":[],"_links":{"self":[{"href":"https:\/\/frantzmartinache.eu\/index.php\/wp-json\/wp\/v2\/posts\/367"}],"collection":[{"href":"https:\/\/frantzmartinache.eu\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/frantzmartinache.eu\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/frantzmartinache.eu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/frantzmartinache.eu\/index.php\/wp-json\/wp\/v2\/comments?post=367"}],"version-history":[{"count":1,"href":"https:\/\/frantzmartinache.eu\/index.php\/wp-json\/wp\/v2\/posts\/367\/revisions"}],"predecessor-version":[{"id":369,"href":"https:\/\/frantzmartinache.eu\/index.php\/wp-json\/wp\/v2\/posts\/367\/revisions\/369"}],"wp:attachment":[{"href":"https:\/\/frantzmartinache.eu\/index.php\/wp-json\/wp\/v2\/media?parent=367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/frantzmartinache.eu\/index.php\/wp-json\/wp\/v2\/categories?post=367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/frantzmartinache.eu\/index.php\/wp-json\/wp\/v2\/tags?post=367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}