[Astronomy seminar] Reminder: Astronomy departmental seminar Friday November 24 at 10:30am - Aline Chu (Stockholm University)

[Astronomy seminar announcements]

Dear all,

This is a reminder of the weekly SU astronomy departmental seminar that 
will take place in about 34 minutes, at 10:30am in room FC61 (AlbaNova 
building, 6th floor) and on zoom 
(https://stockholmuniversity.zoom.us/s/61002076352). As usual, we 
encourage you to attend in person if possible.
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Speaker: Aline Chu (Stockholm University)
Title: Evolution of the properties of brightest galaxies of clusters and 
groups since the last 10 Gyrs
Event: https://indico.fysik.su.se/e/aline-chu

Abstract:
Galaxy clusters are the largest gravitationally bound structures of the 
Universe. At the center of these clusters reside the most massive 
galaxies observable today, Brightest Cluster Galaxies (BCGs). BCGs are 
the final products of 10 Gyrs of consecutive galactic mergers in the 
densest regions of the cosmic web. They are excellent tracers of cluster 
formation, and ideal to study the impact of environmental processes on 
galactic formation.
The characterization of the physical properties of BCGs is important to 
obtain better knowledge of these galaxies. We have built new catalogues 
of BCGs which have allowed us to conduct a deeper analysis of the 
formation of BCGs, thanks to the bigger statistics we reached.
We find BCGs have shown a lack of evolution of their sizes and 
luminosities in the last 10 Gyrs, hinting at an earlier formation epoch 
and absence of recent significant growth. Their structural properties, 
however, may have changed over time, as hinted by the detection of an 
envelope only at recent epoch. We also compare the evolution of BCGs and 
the brightest galaxies of less dense environments such as galaxy groups 
or more special systems such as fossil groups (FGs). We find that 
brightest galaxies of FGs evolve more similarly to BCGs of clusters than 
brightest galaxies of normal groups of galaxies, as inferred from their 
Kormendy relations.
These results may be confirmed with the future Rubin-LSST survey which 
will observe the entire southern sky at even further lookback times, 
providing us with images of unprecedented depth.
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We look forward to seeing many of you there. Thanks!

Adur and Adélaïde

Upcoming Events:

2023-12-01 Heitor Ernandes
2023-12-08 Quentin Perceval Xavier Pognan
--- Winter break ---

You can subscribe to the seminars calendar in: 
https://ttt.astro.su.se/ical/astro-seminars.ics
(Please note that calendar can be subject to updates)
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Join Zoom Meeting:
https://stockholmuniversity.zoom.us/s/61002076352
Meeting ID: 610 0207 6352