Résumé / Abstract Seminaire_IAP
« Extremely metal-poor blue compact dwarf galaxies »

Polychronis Papaderos
Centro Astrof., Univ. Porto (Porto, Portugal)

Extremely metal-poor blue compact dwarf galaxies (xBCDs) are the best local analogs of low-mass proto-galactic units in the early Universe. Due to their proximity, comparatively young age, and intense starburst activity these systems offer unique laboratories to explore at a high spatial resolution the main processes driving the build-up of dwarf galaxies and the mechanisms facilitating the escape of Lyman continuum radiation from low-metallicity starburst environments.
In this seminar, I'll give a brief overview of the morphological and structural properties of xBCDs.
An intriguing property of these systems is their unusual optical morphology: other than old, higher-metallicity dwarfs, these young irregular systems are characterized by off-center star-forming activity or cometary morphology. This suggests that star formation propagation is an important process in the early phase of dwarf galaxy evolution.
I'll also discuss how strong and extended nebular emission can bias studies of the physical and evolutionary properties of xBCDs and other starburst galaxies near and far. Additionally, I'll briefly comment on the challenges that the spatial decoupling of ionized gas from the ionizing stellar background poses to the study of starburst galaxies with self-consistent spectral synthesis models applied to integral field spectroscopy data.
vendredi 11 décembre 2020 - 11:00
Webinaire, Institut d'Astrophysique de Paris
Page web du séminaire / Seminar's webpage