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<p>Buenos días, <br>
</p>
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<p>les recordamos que <b>hoy a las 13h </b>se brindará, en el
Salón Meridiano, una charla en el marco de los Seminarios de la
FCAG. A continuación les dejamos información sobre la misma y
los datos de conexión para aquellos que no puedan acercarse al
Salón Meridiano.</p>
Seminario FCAG <b>"Galaxy evolution in compact groups</b><b
style="font-weight:normal;"
id="docs-internal-guid-b02f0707-7fff-636f-47d4-c34cb0b70f3a"><span
style="background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"><b>"</b>, a cargo de la </span></b><b>Dra.
G</b><span class="gmail-qu" role="gridcell" tabindex="-1"><span
name="Gissel Pardo Montaguth" class="gmail-gD"><span><b>issel
Pardo Montaguth</b> (IAG - Universidad de Sao Paulo,
Brasil)</span></span></span><b style="font-weight:normal;"
id="docs-internal-guid-e9478a3c-7fff-abf7-a112-ef6a3701ea85"><span
style="background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">, profesora invitada por la Dra. Analía Smith Castelli.</span></b>
<br>
<p><b><span
style="background-color: transparent; font-style: normal; font-variant: normal; text-decoration-skip-ink: none; vertical-align: baseline; white-space: pre-wrap;">Resumen:</span></b><span
style="background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"> </span>Compact
groups (CGs) provide a valuable opportunity to study how galaxy
interactions influence physical and structural parameters due to
their high density and low-velocity dispersion. We investigated
a sample of 340 CGs, including 1,092 galaxies, and compared it
with a control group of 2,300 field galaxies to explore these
effects. Our analysis of the Effective Radius–Sérsic Index
(Re-n) plane revealed a bimodal distribution among transitioning
galaxies in CGs. We define the transition galaxies as those with
redder colors (u-r > 2.3) and Sérsic indices (n < 2.5).
This suggests the presence of a distinct population of smaller,
more compact galaxies in CGs, a population that is absent in the
control sample. This observation indicates that galaxies in CGs
may undergo significant morphological changes. Around 27% of the
CGs are part of larger groups, which we classify as non-isolated
CGs. Transition galaxies in isolated CGs are more likely to
cluster in a denser region of the Re–n plane when n < 1.75.
In contrast, transition galaxies in non-isolated CGs show a more
gradual increase in n values, indicating that these galaxies
have experienced morphological transformations and are the main
contributors to the distribution of more compact galaxies in the
Re–n plane among all transition galaxies in CGs. Moreover,
galaxies in non-isolated CGs display lower specific star
formation rates and a higher proportion of quenched galaxies
compared to their isolated counterparts. Furthermore, a
spatially resolved analysis was performed using integral field
spectroscopy (IFS) data to study both ionized gas and stellar
components in 549 galaxies in CGs and 1,098 field galaxies.
Galaxies in CGs tend to have older stellar populations, although
star-forming galaxies show similar <span><span>Σ</span></span>SFR
profiles to those in the field. However, galaxies with nuclear
activity in CGs exhibit higher <span><span>Σ</span></span>SFR
values and flatter slopes. No significant differences were found
in the metallicity gradients between CG and field galaxies. In
summary, we highlight the critical role of the environment in
the evolution of galaxies in CGs, emphasizing how dense
environments and interactions accelerate morphological
transformation and the quenching process.</p>
<div><b style="font-weight:normal;"
id="docs-internal-guid-341d8b54-7fff-bdc4-ab7e-0ad2d515e481">
<p dir="ltr"
style="line-height:1.2;text-align: justify;margin-top:0pt;margin-bottom:0pt;"><span
style="color: rgb(0, 0, 0); background-color: transparent; font-weight: 700; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Datos de conexión </span></p>
<p dir="ltr"
style="line-height:1.2;text-align: justify;margin-top:0pt;margin-bottom:0pt;"><span
style="color: rgb(0, 0, 0); background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Unirse a la reunión zoom:</span><a
href="https://us02web.zoom.us/j/89642687970"
style="text-decoration:none;" moz-do-not-send="true"><span
style="color: rgb(0, 0, 0); background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"> </span><span
style="color: rgb(17, 85, 204); background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: underline; text-decoration-skip-ink: none; vertical-align: baseline; white-space: pre-wrap;">https://us02web.zoom.us/j/89642687970</span></a></p>
<p dir="ltr"
style="line-height:1.2;text-align: justify;margin-top:0pt;margin-bottom:0pt;"><span
style="color: rgb(0, 0, 0); background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">ID de reunión: 896 4268 7970</span></p>
<p dir="ltr"
style="line-height:1.2;text-align: justify;margin-top:0pt;margin-bottom:0pt;"><span
style="color: rgb(0, 0, 0); background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Código de acceso: 526656</span></p>
</b><b style="font-weight:normal;"
id="docs-internal-guid-341d8b54-7fff-bdc4-ab7e-0ad2d515e481">
<p dir="ltr"
style="line-height:1.2;text-align: justify;margin-top:12pt;margin-bottom:12pt;"><span
style="color: rgb(0, 0, 0); background-color: transparent; font-weight: 700; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">A fin de reducir el uso de residuos plásticos, les solicitamos que se acerquen con sus propias tazas para el café. </span><span
style="color: rgb(0, 0, 0); background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Aunque este seminario será en formato híbrido, esperamos contar con su presencia.</span></p>
</b></div>
<b style="font-weight:normal;"
id="docs-internal-guid-341d8b54-7fff-bdc4-ab7e-0ad2d515e481">
<p dir="ltr"
style="line-height:1.2;text-align: justify;margin-top:12pt;margin-bottom:12pt;"><span
style="color: rgb(0, 0, 0); background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Saludos,</span></p>
<p dir="ltr"
style="line-height:1.2;text-align: justify;margin-top:12pt;margin-bottom:12pt;"><span
style="color: rgb(0, 0, 0); background-color: transparent; font-weight: 400; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">SeCyT-FCAG</span></p>
</b> <br>
<pre class="moz-signature" cols="72">--
Secretaría de Ciencia y Técnica
Facultad de Ciencias Astronómicas y Geofísicas
Horario de atención: lunes a viernes de 8hs a 15hs</pre>
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