<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="">Dear Colleagues,<br class=""><div 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 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 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 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 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 class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" 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; min-height: 15px;" 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="">this is to gently remind you that the next online colloquium of the series: </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 15px;" 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="">Quid Ultra? Frontiers and Controversies in Astrophysics </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 15px;" 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="">will be today at 16:30. You can find all the details below and the updated program </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">for future colloquia at the link: <a href="https://www.quidultra.it/" class=""><span style="-webkit-font-kerning: none; color: rgb(9, 79, 209);" class="">https://www.quidultra.it</span></a></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 15px;" 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: 15px;" 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: 15px;" 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="">Prof. Raffaella Schneider</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">Dipartimento di Fisica "G. Marconi”</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">Senior Fellow, Scuola Superiore di Studi Avanzati Sapienza</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">Sapienza, Università di Roma</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class="">P.le A. Moro 2, 00185 Roma, Italy</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; color: rgb(9, 79, 209);" class=""><span style="text-decoration: underline; -webkit-font-kerning: none;" class=""><a href="mailto:raffaella.schneider@roma1.infn.it" class="">raffaella.schneider@roma1.infn.it</a></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; color: rgb(9, 79, 209);" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal; color: rgb(9, 79, 209);" class=""><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="">June 22 2021 at 16:30</b></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 15px;" 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="">Piero Madau (University of California, Santa Cruz)</b></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 15px;" 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="">Title: The dark and luminous side of structure formation</b></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 15px;" 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="">Abstract: </b></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">The beaded filamentary network of intergalactic gas in which galaxies form and evolve, and which gives origin to a “forest” of hydrogen Lyman-alpha absorption lines in the </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">spectra of distant quasars, encodes information on the physics of structure formation, the nature of the dark matter, the temperature and ionization state of baryons in the </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">Universe. The potential of the Lyman-alpha forest for constraining with percent accuracy the matter density distribution on medium to small cosmological scales has motivated </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">the construction of the Dark Energy Spectroscopic Instrument (DESI), which will measure absorption line spectra backlit by nearly a million high-redshift (<i class="">z >2</i>) quasars. </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">In this talk I will describe the multiple steps needed to connect flux fluctuations in quasar spectra to physical parameters, present an unprecedented suite of hundreds of </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">high-resolution hydrodynamical simulations of structure formation with different thermal histories, and use it to perform a statistical comparison of mock spectra with the </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">observed 1D flux power spectrum and other data. A likelihood analysis shows that, over the last 13 billion years, gas in the cosmic web experienced four main heating and </span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">cooling epochs.</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255); min-height: 15px;" class=""><span style="-webkit-font-kerning: none;" class=""></span><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">Join Zoom Meeting</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class=""><a href="https://uniroma1.zoom.us/j/83598894783?pwd=NTBKeTZ2cU4vRW5xdVc4NDNpVDlidz09" class="">https://uniroma1.zoom.us/j/83598894783?pwd=NTBKeTZ2cU4vRW5xdVc4NDNpVDlidz09</a></span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255); min-height: 15px;" class=""><span style="-webkit-font-kerning: none;" class=""></span><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">Meeting ID: 835 9889 4783</span></div><div style="margin: 0px; font-stretch: normal; line-height: normal; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-font-kerning: none;" class="">Passcode: 358787</span></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; min-height: 15px;" class=""><span style="-webkit-font-kerning: none;" class=""></span><br class=""></div><br class=""><br class=""><br class=""><br class=""></div></div></div></div></div></div><br class=""><br class=""><br class=""></div></div></div></div></div>
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