<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 all,<div class=""><br class=""></div><div class="">This is a reminder about <b class="">Kelley Hess’s seminar in 20 minutes!</b></div><div class=""><br class=""></div><div class="">Kind regards,</div><div class="">Eliot<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 30 Jan 2023, at 15:23, Eliot Ayache <<a href="mailto:eliot.ayache@astro.su.se" class="">eliot.ayache@astro.su.se</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear all,<br class=""><br class="">The next SU astronomy departmental seminar will take place on <b class="">Friday February 3rd at 10:30 in room FC61</b> (AlbaNova building, 6th floor) <b class="">and on zoom (<a href="https://stockholmuniversity.zoom.us/s/61002076352" class="" style="font-weight: normal;">https://stockholmuniversity.zoom.us/s/61002076352</a>).<br class=""></b><br class="">———————————<div class=""><div class=""><b class="">Speaker: Kelley Hess (IAA-CSIC, Granada, Spain)</b><br class=""><b class="">Title: Ram pressure stripping in galaxy cluster substructure</b><br class=""><a href="https://www.albanova.se/event/astronomy-departmental-seminar-kelley-hess-csic/" class="">https://www.albanova.se/event/astronomy-departmental-seminar-kelley-hess-csic/</a></div><div class=""><br class="">Abstract:<br class="">In the cluster environment, a galaxy’s motion through the ICM results in a loss of the multi-phase interstellar medium through ram pressure stripping. This can be seen through the displacement of neutral and ionized gas, and triggered star formation. To date, the impact of ram pressure has been considered almost exclusively from the stand point of individual galaxies. However, a large fraction of cluster members have been accreted as members of groups, which contain their own warm/hot intragroup medium. We present a multi-wavelength study including exquisite MeerKAT HI and DECam Halpha imaging of the center of the Hydra Cluster and a foreground galaxy group. Members of the group exhibit compressed HI contours, well-defined HI tails, and ongoing star formation in the stripped gas. We use the HI and stellar morphologies, combined with a Beta model of the hot ICM, to constrain the galaxy orbits and real distances of the galaxies to the cluster center. It’s likely that the group has already passed its pericenter and is actually on “out fall” from the cluster. The high surviving HI content of the galaxies may suggest that the substructure/intragroup medium or CGM can protect them from the harshest effects of ram pressure, or that the galaxies are on more tangential orbits.<br class=""><div class="">———————————</div><div class=""><div class=""><br class="">We look forward to seeing many of you there. Thanks!<br class=""><br class="">Eliot and Kris<br class=""><br class=""><br class=""><br class="">Upcoming Events:<br class=""><br class=""></div><div class="">2023-02-10<span class="Apple-tab-span" style="white-space: pre;"> </span> No seminar - OKC day</div><div class="">2023-02-17<span class="Apple-tab-span" style="white-space: pre;"> </span> Diane Feuillet (Lund Obs.)</div><div class="">2023-02-24 Martin Rey (Oxford Uni., UK)<br class=""><br class=""><br class="">———————————</div><div class="">Join Zoom Meeting:<br class=""><a href="https://stockholmuniversity.zoom.us/s/61002076352" class="">https://stockholmuniversity.zoom.us/s/61002076352</a></div><div class="">Meeting ID: 610 0207 6352</div><div class=""><br class=""></div></div></div></div></div></div></blockquote></div><br class=""></div></body></html>