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<div class="pre" style="margin: 0; padding: 0; font-family: monospace">********************************************<br /> Secretaría Dpto. de Física<br /> <a href="mailto:secre2@fisica.unlp.edu.ar">secre2@fisica.unlp.edu.ar</a><br /> Cecilia Cafiero / Alejandro Chiquino<br /> 115 e/48 y 49 - Detrás del Colegio Nacional<br /> Facultad de Ciencias Exactas - UNLP<br /> ********************************************</div>
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<th align="right" valign="baseline" nowrap="nowrap">Asunto:</th>
<td>Invisibles21: today's talk: 4 June 2021 - 17:30 CEST —> Andrea Ghez (UCLA, Nobel Laureate in Physics 2020)</td>
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<th align="right" valign="baseline" nowrap="nowrap">Fecha:</th>
<td>2021-06-04 08:39</td>
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<th align="right" valign="baseline" nowrap="nowrap">Remitente:</th>
<td>Ernesto Arganda Carreras <ernesto.arganda@csic.es></td>
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<th align="right" valign="baseline" nowrap="nowrap">Destinatario:</th>
<td>Secretaria del Dpto.de Física <secre2@fisica.unlp.edu.ar></td>
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<p style="text-align: justify;"><span class=""><span style="font-size: medium;"><span class=""><br />Para enviar a [Todos], ¡gracias!<br /> <br /> ---<br /> </span><strong class=""><br /> <span style="font-size: 12pt;">Andrea Ghez</span></strong><span style="font-size: 12pt;"> (UCLA, <strong class="">Nobel Laureate in Physics 2020</strong>) "<span class="" style="font-variant-ligatures: normal; text-decoration-thickness: initial;">Our Galactic Center: A Unique Laboratory for the Physics & Astrophysics of Black Holes", 4 June 2021 - 17:30 CEST.<br /> </span></span></span></span></p>
<p class="MsoNormal" style="text-align: justify;"><span class="" style="font-size: 12pt;">Abstract: </span></p>
<p class="MsoNormal" style="text-align: justify;"><span class="" style="font-size: 12pt;">The proximity of our Galaxy's center presents a unique opportunity to study a galactic nucleus with orders of magnitude higher spatial resolution than can be brought to bear on any other galaxy. After more than a decade of diffraction-limited imaging on large ground-based telescopes, the case for a supermassive black hole at the Galactic center has gone from a possibility to a certainty, thanks to measurements of individual stellar orbits. The rapidity with which these stars move on small-scale orbits indicates a source of tremendous gravity and provides the best evidence that supermassive black holes, which confront and challenge our knowledge of fundamental physics, do exist in the Universe. This work was made possible through the use of speckle imaging techniques, which corrects for the blurring effects of the earth's atmosphere in post-processing and allowed the first diffraction-limited images to be produced with these large ground-based telescopes.</span></p>
<p class="MsoNormal" style="text-align: justify;"><span class="" style="font-size: 12pt;">Further progress in high-angular resolution imaging techniques on large, ground- based telescopes has resulted in the more sophisticated technology of adaptive optics, which corrects for these effects in real time. This has increased the power of imaging by an order of magnitude and permitted spectroscopic study at high resolution on these telescopes for the first time. With adaptive optics, high resolution studies of the Galactic center have shown that what happens near a supermassive back hole is quite different than what theoretical models have predicted, which changes many of our notions on how galaxies form and evolve over time. By continuing to push on the cutting-edge of high-resolution technology, we have been able to capture the orbital motions of stars with sufficient precision to test Einstein's General theory of Relativity in a regime that has never been probed before.</span></p>
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<p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: 12.65pt;"><span style="font-size: 12pt;"><strong class=""><span class="">To connect:</span></strong></span></p>
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<li class="MsoNormal" style="line-height: normal;"><span style="font-size: 12pt;"><strong class=""><span class="">HIDDeN YouTube channel</span></strong><span class=""> to follow the talks in streaming in case you found the Zoom room full<span class="" style="color: blue;"><a class="moz-txt-link-freetext" href="https://www.youtube.com/channel/UCmjgtR6aH7eph8u_WQkzRB">https://www.youtube.com/channel/UCmjgtR6aH7eph8u_WQkzRB</a>g</span></span></span></li>
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<pre class="moz-signature"><span style="font-size: 12pt;">--</span>
Ernesto Arganda
High Performance Computing, Machine Learning and AI Group
Instituto de Física Teórica UAM-CSIC
C/ Nicolás Cabrera 13-15
Campus de Cantoblanco UAM
28049 Madrid - Spain
Phone: (+34) 912 999 854
Fax: (+34) 912 999 652
Cell: (+34) 662 485 319
E-mail: <a class="moz-txt-link-abbreviated" href="mailto:ernesto.arganda@csic.es">ernesto.arganda@csic.es</a></pre>
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