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An integral field spectroscopy study of the metal-poor star-forming galaxy UGC 4722

Iris P. Breda

Low-metallicity late-type dwarf galaxies are important laboratories of extragalactic astronomy and observational cosmology. In this cookie seminar, following a brief introduction on the general properties of these galaxies and the motivation behind their study, I will present preliminary results from an ongoing integral field spectroscopy (IFS) study of UGC 4722 - one of the most isolated dwarf galaxies known. This metal-poor (12+log(O/H) ~ 7.5-7.6; Chengalur et al. 2015) and very gas rich dwarf galaxy (M_B=-17.4) shows extended star-forming activity and a ~14 kpc long stellar plume that has been suggested to result from a recent minor-merger episode. Using IFS data from the Calar Alto Legacy Integral Field spectroscopy Area survey (CALIFA) we study stellar age patterns and the (ionized-gas and stellar) kinematics in this galaxy with the goal of gaining insight into its evolutionary status and the role that interactions may have played on its assembly history.

2015 May 20, 13:30

Centro de Astrofísica da Universidade do Porto (Classroom)
Rua das Estrelas, 4150-762 Porto

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia