Starburst activity and structural properties of Blue Compact Dwarf galaxies
IDPASC Portugal - PHD Programme 2016
2016 / 2017
Jean Michel Gomes
Universidade do Porto
Instituto de Astrofísica e Ciências do Espaço, IA-CAUP
Blue Compact Dwarf (BCD) galaxies are the best local analogues of low-mass protogalactic units that rapidly formed out of almost metal-free gas in the early Universe. These galaxies undergo vigorous starburst activity over a spatial extent of ~1 kpc, producing thousands of massive OB stars in a brief (10 Myr) starburst episode. The release of energy and momentum from stellar winds and supernovae is expected to lead to a large-scale acceleration and thermalization of the gas component of BCDs, and the ejection of hot (several 106 K), metal-enriched gas into their halo in form of fast (a few 100 km/s) galactic winds. This Ph.D. project will center on the analysis of broad-band (B,R,I) and narrow-band (Hα) data for a sample of approximately 100 BCDs. Its main goals are: a) to investigate starburst-driven galactic outflows using narrow-band images and longslit and integral field spectroscopy data, and b) to carry out a systematic investigation of the structural properties of the starburst component and underlying host galaxy of the sample BCDs using surface photometry and profile decomposition techniques.