[Astronomy seminar] Astronomy Department Seminar - April 8th Fernando Buitrago

[Astronomy seminar announcements]

Hello

On Friday the 8th of April at 10:30, Fernando Buitrago (Valladolid/IA 
Portugal) will be giving our next seminar. This will be a hybrid seminar 
- you are welcome to either attend in person in FC61 or via Zoom. After 
the seminar we will going for lunch with Fernando at Proviant. Fernando 
will be visiting the department on Thursday and Friday.

*The faintest surface brightness limits of high redshift galaxies*

The Low Surface Brightness (LSB) regime is the last niche for studies of 
galaxy formation and evolution. It is of outstanding importance for 
investigating not only the smallest galaxies, but also for the most 
massive ones. We will review the state-of-the-art of how massive 
galaxies progressively change their properties over cosmic time, and how 
LSB describes this mass assembly. Going to the deepest Hubble Space 
Telescope fields, we will show our latest results looking for galaxy 
truncations, real galaxy edges whose existence is linked with the gas 
density threshold for star formation. Therefore, we obtain a new 
physically-motivated mass-size relation, whereby massive galaxies grow 
by a factor of two since z = 1 while at the same time increasing by an 
order of magnitude their stellar density at the truncation position. The 
retrieval of these galaxy limits will be very beneficial for the study 
of stellar haloes and also for elucidating dark matter halo sizes. We 
will also present our future plans for improving all these results by 
making use of JWST and Euclid forthcoming data.

Thanks
Chris and Carolina

Christopher Usher is inviting you to a scheduled Zoom meeting.

Topic: Astronomy Department Seminar - Fernando Buitrago
Time: Apr 8, 2022 10:30 AM Stockholm

Join Zoom Meeting
https://stockholmuniversity.zoom.us/j/69749792158

Meeting ID: 697 4979 2158
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