[Astronomy seminar] Astronomy seminar Friday 8/11: 10:30 FC61: Nikki Zabela

[Astronomy seminar announcements]

Astronomy Seminar

Time & location: Friday November 8, 10:30 in FC61

Speaker: Nikki Zabela (Cardiff)

Title:  How does the galaxy cluster environment affect molecular gas and 
star formation? - The ALMA Fornax Cluster Survey

Abstract:
When many galaxies crowd together in a small space, the environment gets 
harsher and more stressful for them. As a result, they wear out more 
quickly and retire younger than their peers in less populated areas: 
their star formation is quenched rapidly. This is why in galaxy clusters 
we find a large fraction of early-type galaxies compared to late-type 
spirals, which are much more common in the field.  It has been known for 
a while that the responsible mechanisms for this early quenching, such 
as ram pressure stripping, galaxy-galaxy interactions, and starvation, 
play a significant role in removing the atomic gas from galaxies. If 
they are able to also directly affect the much more tightly bound and 
centrally located molecular gas, is less obvious. Since this gas is the 
direct fuel for star formation, this would have important implications 
for the evolution of cluster galaxies, and, with many galaxies residing 
in clusters and groups, galaxy evolution in the universe. With the ALMA 
Fornax Cluster Survey we study the molecular gas in Fornax cluster 
galaxies to find out whether the molecular gas in cluster galaxies can 
be removed directly through these processes, and how this affects their 
star formation.

Upcoming events:
15/11 (Fri) @ 10:30: Angela Adamo (SU Astronomy)
22/11 (Fri) @ 10:30: Johan Fynbo (NBI)
29/11 (Fri) @ 10:30: Liisa Husu (Örebro University)

Also see https://www.albanova.se/events/seminars/ for scheduled seminars.

All welcome!
Alexis Brandeker (Astronomy seminar organiser 2019)