Extreme emission-line galaxies: New light on the mass assembly and chemical enrichment of low-mass galaxies

Galaxies showing early and significant stages of mass assembling are key objects for understanding galaxy evolution. However, young starbursts like these are extremely rare in the local Universe. In this context, a unique population of compact, low-mass galaxies forming stars at unusually high rates - also known as the "green peas" - emerge now as ideal laboratories to study the details of massive star formation, feedback and chemical enrichment, under physical conditions likely resembling those in galaxies at high redshift.
In this seminar, recent highlights from several observational studies on extreme emission-line galaxies will be reviewed. I will put special emphasis on the exciting results revealed by deep GTC spectroscopy and HST imaging of green peas, including a detailed analysis of their chemical abundances, star formation histories and ionized gas kinematics, which contribute with new insights on the mass growth and chemical enrichment histories of these intriguing objects. Finally, these results will be connected with a much larger ongoing study which focuses on the evolution of extreme emission-line galaxies during the last 8 billion years.

23/05/2013 - 14:30
Dr. R. Amorin