<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">Dear Colleagues,</div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">we are pleased to announce that the </span><span style="-webkit-font-kerning: none; color: rgb(24, 25, 27); background-color: rgb(246, 247, 249);" class="">third </span><span style="-webkit-font-kerning: none;" class="">colloquium of the 2022 program <i class="">QUID ULTRA? Frontiers and Controversies in Astrophysics, </i></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">will be </span><span style="-webkit-font-kerning: none;" class=""><b class="">on wednesday, April</b></span><span style="-webkit-font-kerning: none;" class=""><b class=""> 6 2022</b> <b class="">at 16:30 by</b> </span><span style="-webkit-font-kerning: none;" class=""><b class="">Georges Meynet (University of Geneva)</b></span><span style="-webkit-font-kerning: none;" class=""><b class="">.</b></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""><b class=""></b></span><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">Title and abstract are attached below. </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""><b class=""></b></span><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">The seminar will be held remotely by the speaker through the following zoom link:</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""><b class=""></b></span><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal; color: rgb(107, 0, 109);" class=""><span style="text-decoration: underline; -webkit-font-kerning: none;" class=""><a href="https://uniroma1.zoom.us/j/81122901013?pwd=M1hnRHRXZkEyeW1QMFlPQ2FXa0dNZz09" class="">https://uniroma1.zoom.us/j/81122901013?pwd=M1hnRHRXZkEyeW1QMFlPQ2FXa0dNZz09</a></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""> </span><br class="webkit-block-placeholder"></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">ID riunione: 811 2290 1013</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">Passcode: 686688</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""> </span><br class="webkit-block-placeholder"></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""></span><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">The </span><span style="-webkit-font-kerning: none;" class="">program QUID ULTRA? Frontiers and Controversies in Astrophysics is a series of monthly prestigious colloquia that will be </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">running from early February till October 2022. This initiative has been funded by Sapienza University with the co-sponsorship of </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">INAF/Astronomical Observatory of Rome and of the joint PhD program in Astronomy, Astrophysics and Space Science of Sapienza, </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">Tor Vergata University and INAF.</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""></span><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">Looking forward to seeing you soon, </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""></span><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">Raffaella Schneider (on behalf of the SOC)</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""></span><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">————————————————</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class=""><b class="">April 6 2022, 16:30</b></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""></span><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class=""><b class="">Speaker: </b></span><span style="-webkit-font-kerning: none;" class=""><b class="">Georges Meynet (University of Geneva)</b></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""><b class=""></b></span><br class=""></div><div style="-webkit-text-stroke-width: initial; margin: 0px; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(218, 215, 211);" class=""><span style="-webkit-font-kerning: none; -webkit-text-stroke-color: rgb(0, 0, 0);" class=""><b class="">Title: </b></span><span style="-webkit-font-kerning: none;" class=""><b class="">Stars at the Extreme: First Stars, Spinstars and Supermassive stars</b></span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(218, 215, 211); min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""><b class=""></b></span><br class=""></div><div style="-webkit-text-stroke-width: initial; margin: 0px; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(218, 215, 211);" class=""><span style="-webkit-font-kerning: none;" class=""><b class="">Abstract:</b></span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; text-align: justify; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">The presentation will focus on stars at some extreme either from the point of view of their mass (supermassive stars), rotation (spinstars) or initial composition </span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; text-align: justify; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">(Pop III stars). The talk will begin by a general overview of the main challenges faced by the modeling of massive stars with a special focus on the </span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; text-align: justify; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">transport processes in convective and radiative zones. Then the presentation will continue discussing recent results about the binary statistics of Pop III </span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; text-align: justify; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">populations, the chemical and radiative feedback of Pop III stars, the evolution of very massive stars i.e. stars with masses between 150 and 300 solar </span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; text-align: justify; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">masses at different metallicities addressing the question of the progenitor of Pair Instability supernovae and the limits of the mass domain for the </span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; text-align: justify; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">black hole mass gap. Finally, new models for the formation of supermassive stars that are candidates as seeds for the formation of supermassive black holes </span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; text-align: justify; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">at high redshift will be presented.</span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(218, 215, 211); min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""></span><br class=""></div><div style="-webkit-text-stroke-width: initial; margin: 0px; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(218, 215, 211);" class=""><span style="-webkit-font-kerning: none; background-color: rgb(255, 255, 255);" class="">Join Zoom Meeting</span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; font-stretch: normal; line-height: normal; color: rgb(107, 0, 109); -webkit-text-stroke-color: rgb(218, 215, 211);" class=""><span style="text-decoration: underline; -webkit-font-kerning: none;" class=""><a href="https://uniroma1.zoom.us/j/81122901013?pwd=M1hnRHRXZkEyeW1QMFlPQ2FXa0dNZz09" class="">https://uniroma1.zoom.us/j/81122901013?pwd=M1hnRHRXZkEyeW1QMFlPQ2FXa0dNZz09</a></span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(218, 215, 211); min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""> </span><br class="webkit-block-placeholder"></div><div style="-webkit-text-stroke-width: initial; margin: 0px; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(218, 215, 211);" class=""><span style="-webkit-font-kerning: none;" class="">ID riunione: 811 2290 1013</span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(218, 215, 211);" class=""><span style="-webkit-font-kerning: none;" class="">Passcode: 686688</span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(218, 215, 211);" class=""><span style="-webkit-font-kerning: none;" class="">————————————————</span></div><div style="-webkit-text-stroke-width: initial; margin: 0px; font-stretch: normal; line-height: normal; -webkit-text-stroke-color: rgb(218, 215, 211); min-height: 16px;" class=""><span style="-webkit-font-kerning: none;" class=""></span><br class=""></div><div class="">
<meta charset="UTF-8" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div>Prof. Raffaella Schneider</div><div><a href="mailto:raffaella.schneider@uniroma1.it" class="">raffaella.schneider@uniroma1.it</a></div><div class="">Dipartimento di Fisica </div><div class="">Senior Fellow Scuola Superiore di Studi Avanzati Sapienza</div><div class="">Sapienza Università di Roma</div><div class="">P.le A. Moro 2, 00185 Roma, Italy</div><div class="">Phone: +39 06 4991 4312</div><div class="">Skype: raffasch</div><div class="">Zoom: <a href="https://uniroma1.zoom.us/j/86080015153?pwd=dlV1eVNsS0xwazlMWTVZV05YeXZyUT09" class="">https://uniroma1.zoom.us/j/86080015153?pwd=dlV1eVNsS0xwazlMWTVZV05YeXZyUT09</a></div></div><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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