<div dir="ltr">Happening in 10 mins!<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jun 27, 2022 at 2:24 PM Ming-Feng Ho <<a href="mailto:mingfeng.ho@email.ucr.edu">mingfeng.ho@email.ucr.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Hi all,</div><div><br></div><div>Mahdi (4th year PhD student in Simeon Bird's group) will give a talk on Lya tomography this Wednesday. This is a project done jointly with Carnegie-Observatory in Pasadena through a UCR fellowship. Please come and ask questions if you're interested!</div><div><br></div><div>In the subsequent weeks, we will have Reza Monadi (Bird's group), and Liz Finney (John Barton's group) give talks.</div><div><br></div><div>Please check our program here: [<a href="https://jibancat.github.io/ucr-student-seminars/program/index.html" target="_blank">Program</a>]</div><div><div><br></div></div><div><br></div><div style="text-align:center"><b>Title: Applications of 3D Ly-α tomography</b></div><div style="text-align:center"><br></div><div style="text-align:center">Mahdi Qezlou (University of California, Riverside)<br></div><div style="text-align:center"><br></div><div style="text-align:center"><b>Abstract: </b>Ly-α tomography surveys have begun to produce three-dimensional (3D) maps of the intergalactic medium (IGM) opacity at z∼2.5 with Mpc resolution. These surveys provide an exciting new window to discover and characterize high-redshift overdensities, including the progenitors of today's massive groups and clusters of galaxies, known as protogroups and protoclusters. In this talk, I will introduce our novel method for delineating the boundaries of structures detected in 3D Ly-α flux maps by applying classical image segmentation techniques. Moreover, I will argue how the Ly-α tomography is complementary to the conventional galaxy surveys by discussing an interesting population of observed protoclusters, in Lyman-α Tomographic IMACS Survey (LATIS), which contain surprisingly fewer UV-bright galaxies compared with the dark matter halos in mock-observed simulations. Finally, I will discuss other potential applications of these tomography surveys, such as the synergies with line intensity map (LIM) experiments.</div><div style="text-align:center"><br></div><div style="text-align:center">Wednesday, June 29, 2022 at 4 pm<br>Physics 3027 (Nebula Room)<br></div><div style="text-align:center"><br></div><div><div><div><font color="#000000">To submit abstracts for Summer Quarter: [<a href="https://jibancat.github.io/ucr-student-seminars/registration/index.html" target="_blank">Abstract Submission</a>].</font></div><div><font color="#000000"><br></font></div><div><font color="#000000">PS, Mahdi will be the host for the PASS talks after 7/6 because I will be out of town.</font></div><div><font color="#000000"><br></font></div><div><font color="#000000">Hope to see you there!</font></div><font color="#888888"><font color="#888888"><font color="#888888"><font color="#000000">Ming-Feng Ho</font></font></font></font></div><div></div><div></div></div><br></div>
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