<div dir="ltr"><span class="" style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px"><span><font face="arial, helvetica, sans-serif" color="#000000" style="border-collapse:collapse"><span style="line-height:21px">Hola a todos, </span></font></span><span><div dir="ltr">
<div><font color="#000000"><font face="arial, helvetica, sans-serif"><span style="border-collapse:collapse;line-height:21px"><div style="line-height:21px"><br style="line-height:21px"></div><div style="line-height:21px">Les recuerdo que hoy, miércoles 31 de julio, tenemos <a href="http://users.df.uba.ar/gaston/seminarios.html" target="_blank" style="color:rgb(17,85,204);line-height:21px;font-weight:inherit;text-decoration:underline">seminario de teoría de campos y gravitación</a>, que se llevará a cabo a las 14 hs en el Departamento de Física FCEN-UBA. Los detalles son los siguientes:</div>
<div style="line-height:21px"><br style="line-height:21px"></div><div style="line-height:21px">Speaker: Oscar Hernández (Marianopolis College & McGill University, Canada).<br style="line-height:21px"></div></span><span style="border-collapse:collapse;line-height:21px">Horario: miércoles 31/7, 14 hs.</span><span style="border-collapse:collapse;line-height:21px"><div style="line-height:21px">
Lugar: aula de seminarios del Departamento de Física.</div><div style="line-height:21px"><br></div></span></font></font><font color="#000000"><font face="arial, helvetica, sans-serif"><span style="border-collapse:collapse;line-height:21px">Título: "How to See the Dark: Signatures of strings and other things in the 21 cm radiation from high redshift hydrogen".</span></font></font></div>
<div><font color="#000000"><font face="arial, helvetica, sans-serif"><span style="border-collapse:collapse;line-height:21px"><br></span></font></font></div><div><font color="#000000"><font face="arial, helvetica, sans-serif"><span style="border-collapse:collapse;line-height:21px">Abstract: Because the physics of the Dark Ages is relatively simple and well understood, any observed deviation from the expected evolution would be a clean signature of new physics. I will discuss this physics and show how the 21 cm line can be used to</span></font></font></div>
<div><font color="#000000"><font face="arial, helvetica, sans-serif"><span style="border-collapse:collapse;line-height:21px">i. see cosmic strings, if they exist, and</span></font></font></div><div><font color="#000000"><font face="arial, helvetica, sans-serif"><span style="border-collapse:collapse;line-height:21px">ii. test the assumptions of statistical isotropy of the universe through the matter power spectrum.</span></font></font></div>
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Quedan todos cordialmente invitados.</div><span class=""><font color="#888888"><span><font><span style="line-height:21px"><font style="line-height:normal"><div style="line-height:21px">Guillem </div></font></span></font></span></font></span></span></font></div>
</div></span></span><br clear="all"><div><br></div>-- <br><div dir="ltr">Guillem Pérez Nadal<div>Physics Department</div><div>University of Buenos Aires</div></div>
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