22-30 July 2021
North-West University
Africa/Johannesburg timezone
More Information Coming Soon

Kinematics and star formation histories of brightest cluster galaxies

Not scheduled
20m
Potchefstroom Campus (North-West University)

Potchefstroom Campus

North-West University

Poster Presentation Track D1 - Astrophysics Astrophysics

Speaker

Siyabulela Andile Nkosi (North-West University)

Description

BEAMS is a spectroscopic survey of brightest cluster galaxies (BCGs) in massive clusters detected
by the Advanced Atacama Cosmology Telescope (AdvACT). The goal is to trace the evolution
of AGN feedback (both radio and quasar mode), stellar populations, and the growth of central
galaxies in clusters over a 3.4 Gyr time period (0.3 < z < 0.8). Our study is focused on analyzing
the new spectroscopic data of the BEAMS BCGs observed on the Southern African Large Telescope
(SALT). In particular, we extract the spectra and stack them to increase the signal-to-noise ratios
to get more accurate measurements. The stellar populations and star formation histories of BCGs
can then be measured as a function of cluster mass and redshift. We will present our results on
the kinematic properties and star formation histories measured from the stacked BCG spectra.different objects from the longslit
spectra, and the goal is to stack the spectra to increase the signal-to-noise ratios to get more
accurate measurements.The stellar populations and star formation histories of BCGs can then be
measured as a function of cluster mass and redshift. We will also directly fit the stacked spectra
with stellar population models in order to constrain their star formation histories.

Level for award;(Hons, MSc, PhD, N/A)?

MSc

Apply to be considered for a student ; award (Yes / No)?

Yes

Primary author

Siyabulela Andile Nkosi (North-West University)

Co-author

Ilani Loubser (North-West University)

Presentation Materials

Peer reviewing

Paper