8-12 July 2013
Africa/Johannesburg timezone
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Fuelling the star formation in brightest cluster galaxies

9 Jul 2013, 10:50
20m
Oral Presentation Track D1 - Astrophysics Astro

Speaker

Dr Ilani Loubser (North-West University)

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

No

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Abstract content <br> &nbsp; (Max 300 words)

I will report on an ongoing investigation aimed at constraining the formation and evolution of brightest
cluster galaxies (BCGs) and the connection with the evolution of the host clusters. We use 2D and 3D spectroscopy to investigate the origin of the gas fuelling the recent star formation detected in
some BCGs by measuring their emission lines. This enables us to derive fundamental gas properties such as
electron density and gas temperature, which in turn, enables us to derive accurate abundances. Our small,
carefully selected, sample consists of star forming BCGs with detected H-alpha filaments, and have existing data
from the X-ray regime available, but lacks the detailed optical emission-line data that will probe the dominant
ionization processes, excitation sources, morphology and kinematics of the hot gas. This, combined with the
other multiwavelength data, will form a complete view of the different phases (hot and cold gas and young stars)
and how they interact in the processes of star formation and feedback detected in central galaxies in cooling flow
clusters, as well as the influence of the host cluster.

Primary author

Dr Ilani Loubser (North-West University)

Presentation Materials

Peer reviewing

Paper