[Graduados] Seminarios FCAG - 11/12 - 12/12 y 13/12 - 13:00h

Vie Dic 6 13:27:32 -03 2024

Buenas tardes,

les informamos que *el próximo miércoles 11, jueves 12 y viernes 13 de 
diciembre *se brindarán, en el Salón Meridiano, tres charlas en el marco 
de los Seminarios de la FCAG. A continuación, les dejamos información 
sobre las mismas y los datos de conexión para aquellos que no puedan 
acercarse al Salón Meridiano.

*1)-Miércoles - 13h -* Seminario FCAG *"Galaxy Evolution in Dense 
Environments: Physical and Morphological Properties***"*, a cargo de la 
*Dra. ***Ciria Lima Dias* (Universidad de La Serena, Chile)*, profesora 
invitada por la Dra. Analía Smith Castelli.*

*Resumen:*Galaxy clusters are ideal laboratories for studying galaxy 
evolution in dense environments, and current multiwavelength surveys 
allow us to observe changes in the colors and morphology of galaxies 
across different filters. In this work, we utilize data from the 
Southern Photometric Local Universe Survey (S-PLUS), which includes 12 
filters in the visible range of the spectrum, to analyze galaxies as a 
whole and to perform bulge-disc decomposition. Studying the distinct 
components of a cluster galaxy separately is crucial, as these 
components are influenced by the environment in different ways. We 
investigate the behavior of structural (Sérsic index and effective 
radius) and physical (stellar mass and star formation rate) properties 
of the galaxies and correlate them with the environment (clustercentric 
distance, local density, and substructure). As a result, we found that 
the star-forming galaxies in the Hydra cluster have bluer bulges 
compared to their discs, indicating that the environment is quenching 
these galaxies from the outside in.

**

*2)-Jueves - 13h -* Seminario FCAG *"El rol de la Meteorología en la 
Fuerza Aérea Argentina***"*, a cargo del *Mayor Mauricio Nicolás Laurizi 
*(FAA).*

**

***

*Resumen:* El mayor Mauricio Nicolás Laurizi, integrante del 
Departamento Meteorología de la Fuerza Aérea Argentina, dará una 
exposición referente al rol de la Meteorología en la Fuerza  y la 
relevancia que adquiere el componente meteorológico como parte 
fundamental en el proceso de Toma de Decisiones; en el ámbito del 
planeamiento táctico y operacional. En este sentido, el meteorólogo de 
la Fuerza Aérea, apoyado en sus conocimientos y experiencia, es quien 
emite su opinión profesional para el cabal cumplimiento de objetivos de 
la Conducción Superior.

*

*3)-Viernes - 13h -* Seminario FCAG *"Galaxy evolution in compact 
groups***"*, a cargo de la **Dra. **Gissel Pardo Montaguth* (IAG - 
Universidad de Sao Paulo, Brasil)*, profesora invitada por la Dra. 
Analía Smith Castelli.*

*Resumen:*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 ΣSFR profiles to those in the field. 
However, galaxies with nuclear activity in CGs exhibit higher ΣSFR 
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.

*

Datos de conexión (son los mismos para la tres charlas)

Unirse a la reunión zoom:https://us02web.zoom.us/j/89642687970 
<https://us02web.zoom.us/j/89642687970>

ID de reunión: 896 4268 7970

Código de acceso: 526656

**

A fin de reducir el uso de residuos plásticos, les solicitamos que se 
acerquen con sus propias tazas para el café. Aunque este seminario será 
en formato híbrido, esperamos contar con su presencia.

*
*

Saludos,

SeCyT-FCAG

*--

Secretaría de Ciencia y Técnica
Facultad de Ciencias Astronómicas y Geofísicas
Horario de atención: lunes a viernes de 8hs a 15hs
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