[seminar] 25. 10. 2022. Neven Tomičić: Properties of ionized gas in gas-stripped and jellyfish galaxies in clusters

[Sanjin Benic]

Drage kolegice i kolege,
Drago mi je da mogu najaviti sljedeći Seminar Fizičkog odsjeka:

Dear colleagues,
I would like to invite you to the following Seminar of the Department of
Physics:

srijeda/Wednesday 25.10.2022. u 14:15 u F08

Properties of ionized gas in gas-stripped and jellyfish galaxies in
clusters

Neven Tomičić
Department of Physics and Astronomy, University of Florence, Italy

The evolution of galaxies are strongly affected by external forces, and 
can
experience various effects while collapsing into galaxy clusters. 
Probing
the interstellar medium of infalling galaxies can show us such processes 
in
various ways. One important component of the interstellar medium is the
diffuse ionized gas (DIG), for which measures of a proper fraction in 
gas
emission can affect our view of gas properties across gas-stripped
galaxies.
    During my first post-doc in Padova, we analyzed the gas properties of
the dense ionized gas and the DIG across galaxies at different stripping
stages while infalling to galaxy clusters (from non-interacting to
"jellyfish" galaxies). We utilized optical IFU observations of 71
gas-stripped and control galaxies from the GASP survey. I will show how 
I
measured the fraction of the diffuse emission for the survey, and 
compared
the gas metallicities and ionization parameter between dense and diffuse
gas. We also investigated the sources of ionization of the gas in disks 
and
stripped tails, and the physical processes leading to them. I will show 
our
finding that the DIG in the tails is at least partly ionized by a 
process
other than star formation, probably by mixing, shocks, and accretion of
inter-cluster and interstellar medium gas.

Cjeloviti oglas je u prilogu./Formatted announcement is attached.

Lijep pozdrav / Best regards
Sanjin Benic i Damjan Pelc
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