[AAA] Ciclo de Coloquios del IAFE 2025

[mariela en iafe.uba.ar]

Buenas tardes, 
Sería posible que circulen la información de abajo? 
Muchas gracias! 
Saludos cordiales, 
Mariela 
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Tenemos el agrado de invitarlos al próximo coloquio del Instituto de Astronomía y Física del Espacio (IAFE) el próximo miércoles 14/5 a las 11hs en el aula del instituto. El mismo será con motivo de los 100 años de la visita de Einstein a la Argentina. 
El ingreso puede realizarse 10 minutos antes del inicio del coloquio, por orden de llegada y hasta la capacidad máxima del aula. Para quienes no puedan acercarse al mismo, pueden participar de manera virtual por Zoom. 

Los esperamos! 


IAFE (UBA-CONICET) is inviting you to a scheduled Zoom meeting. 

Topic: Coloquios IAFE (CONICET-UBA) 
Time: May 14, 2025 10:45 AM Buenos Aires 

Join Zoom Meeting 
[ https://us02web.zoom.us/j/89162519430?pwd=hkGQjxb3uRlIN4B9TrCYyDTJd3xWUK.1 | https://us02web.zoom.us/j/89162519430?pwd=hkGQjxb3uRlIN4B9TrCYyDTJd3xWUK.1 ] 

Meeting ID: 891 6251 9430 
Passcode: 572908 




Einstein’s Relativity and Unusual Phenomena in Astrophysics Black Holes 

Dr. Félix Mirabel 

IAFE– CONICET, Argentina & CEA–Saclay, France 



Resumen: 

Recently, we realized the existence of unusual changes in GRS 1915+105, the prototypical Galactic Microquasar source of apparent superluminal jets. In the year 2023, this high-energy source presented major changes with respect to the historical values since its discovery three decades ago. The direction of the radio jets changed by 30◦ and the period of the oscillations of the accretion disk of gas to the black hole was reduce from 24m to 8m, in that year. Our analysis indicates that in 2023 the plane of the accretion flow to the black hole was aligned with the line of sight, which explains the deep X-ray obscuration and the high mid-infrared luminosity of the source observed with the James Webb Space Telescope (JWST) in that epoch. I will show that the apparent superluminal motions and the unusual changes observed in 2023, could be explain in the context of the Special and General Relativity theories of Einstein. 







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Dra. Mariela C. Vieytes 
Instituto de Astronomía y Física del Espacio 
(IAFE, CONICET-UBA) 


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