{"id":469,"date":"2021-05-05T09:47:00","date_gmt":"2021-05-05T07:47:00","guid":{"rendered":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/?post_type=eap_event&#038;p=469"},"modified":"2022-01-27T15:07:50","modified_gmt":"2022-01-27T14:07:50","slug":"good-vibrations-seminar-12-joey-mombarg-ku-leuven","status":"publish","type":"eap_event","link":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/events\/good-vibrations-seminar-12-joey-mombarg-ku-leuven\/","title":{"rendered":"Good Vibrations Seminar #12: Joey Mombarg (KU Leuven, Belgium)"},"content":{"rendered":"\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" width=\"870\" height=\"489\" src=\"https:\/\/www.youtube.com\/embed\/IveLTefTM6E?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><em>Asteroseismic modelling of gravito-inertial modes in \u03b3 Doradus pulsators<\/em><\/h2>\n\n\n\n<p><a href=\"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/people\/the-speakers\/\">Joey Mombarg (Institute of Astronomy, KU Leuven)<\/a><\/p>\n\n\n\n<p>The data from the <em>Kepler<\/em> nominal mission have enabled  the detection of gravito-inertial modes in sequences of consecutive  radial order in about 600 \u03b3 Doradus (\u03b3 Dor) pulsators. The fact that  these modes are sensitive to  the deep interior of stars, makes \u03b3 Dor pulsators excellent candidates  for improving the current incomplete prescriptions of the transport of  angular momentum and chemical elements, both important ingredients in  stellar evolution theory. To that extent, forward  modelling of gravito-inertial modes to derive stellar masses, ages, and  mixing efficiencies throughout the radiative envelope, helps us to  understand the possible origins of these transport mechanisms in  intermediate-mass main-sequence stars. <br>High-dimensional grid-based forward modelling quickly becomes  computationally unfeasible for a large sample of stars due to the large  number of required models. This can be circumvented by training neural  networks on a set of stellar evolution  and pulsation models to interpolate the observables in a  high-dimensional parameter space. I will present a novel technique for  modelling gravito-inertial modes in \u03b3 Dor pulsators, using deep  learning, which relies on the individual observed mode periods,  combined with spectroscopy, and Gaia luminosities as input. This method  is combined with a framework which considers the correlated nature of  the pulsations. The extracted (core) masses, ages, and core-overshooting  parameters, combined with the rotation rates,  allows for the investigation of any correlations present in the sample.  Furthermore, I will discuss the effect of adding atomic diffusion  (including radiative levitation) in the stellar models on the predicted  pulsation frequencies, and compare the predicted  surface abundances with observed ones.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Asteroseismic modelling of gravito-inertial modes in \u03b3 Doradus pulsators Joey Mombarg (Institute of Astronomy, KU Leuven) The data from the<\/p>\n<p class=\"readmore\"><a href=\"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/events\/good-vibrations-seminar-12-joey-mombarg-ku-leuven\/\" title=\"Read Good Vibrations Seminar #12: Joey Mombarg (KU Leuven, Belgium)\">Read more &raquo;<\/a><\/p>\n","protected":false},"author":73,"featured_media":470,"comment_status":"open","ping_status":"closed","template":"","categories":[],"class_list":["post-469","eap_event","type-eap_event","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/eap_event\/469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/eap_event"}],"about":[{"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/types\/eap_event"}],"author":[{"embeddable":true,"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/users\/73"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/comments?post=469"}],"version-history":[{"count":4,"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/eap_event\/469\/revisions"}],"predecessor-version":[{"id":618,"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/eap_event\/469\/revisions\/618"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/media\/470"}],"wp:attachment":[{"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/media?parent=469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/categories?post=469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}