{"id":74,"date":"2020-12-02T11:14:22","date_gmt":"2020-12-02T10:14:22","guid":{"rendered":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/?post_type=eap_event&#038;p=74"},"modified":"2021-01-28T11:11:39","modified_gmt":"2021-01-28T10:11:39","slug":"good-vibrations-seminar1","status":"publish","type":"eap_event","link":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/events\/good-vibrations-seminar1\/","title":{"rendered":"Good Vibrations Seminar#1:  Jordan Philidet (LESIA)"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"alignleft is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/files\/2020\/12\/photo-e1606907246869.jpg\" alt=\"\" class=\"wp-image-76\" width=\"134\" height=\"180\" \/><\/figure><\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><em>The Origin of p-mode Asymmetry and Asymmetry Reversal in Solar-like Oscillators<\/em><\/strong><\/p>\n\n\n\n<p class=\"has-medium-font-size\"><a href=\"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/people\/the-speakers\/\">Jordan Philidet (LESIA Paris Observatory)<\/a><\/p>\n\n\n\n<p>Space-borne  missions such as Kepler allow us to achieve a spectral resolution which  is now sufficiently high to resolve the shape of the p-mode line  profiles of solar-like stars, and in particular to measure the asymmetry  they feature in the temporal Fourier domain. However, the physical  origin of these asymmetries is still not fully understood, even for the  Sun. In particular, there is no clear consensus to explain the asymmetry  reversal between the velocity and intensity observables.<br><br>In  this context, I will present an approach designed to better understand  the physical origin of solar-like p-mode asymmetries, both in velocity  and intensity. To that end, we model the spectral power density by  convolving 1) the Green\u2019s function associated to the oscillating mode,  which we computed numerically using a 1D evolutionary stellar model, and  2) a source term, obtained by coupling an analytical turbulence model  with CO5BOLD 3D simulations of the stellar atmosphere. I will show that  we successfully reproduce the observed asymmetries in the case of the  Sun, both in velocity and intensity. These results allow us to better  understand the physical mechanisms pertaining to solar-like p-modes  asymmetry, and go a long way towards explaining the asymmetry reversal  puzzle.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jordan Philidet (LESIA Paris Observatory) will tell us about his latest work on: &#8220;The Origin of p-mode Asymmetry and Asymmetry Reversal in Solar-like Oscillators&#8221;<\/p>\n","protected":false},"author":73,"featured_media":76,"comment_status":"open","ping_status":"closed","template":"","categories":[],"class_list":["post-74","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\/74","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=74"}],"version-history":[{"count":13,"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/eap_event\/74\/revisions"}],"predecessor-version":[{"id":230,"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/eap_event\/74\/revisions\/230"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/media\/76"}],"wp:attachment":[{"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/media?parent=74"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.lesia.obspm.fr\/the-good-vibrations-seminars\/wp-json\/wp\/v2\/categories?post=74"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}