Institute of Astronomy

Extremely metal-poor galaxies: Chemical laboratories of the early universe

SpeakerTalk DateTalk Series
Enrique Perez-Montero (IAA Granada)30 June 2017Institute of Astronomy Galaxies Discussion Group

Abstract

Extremely metal-poor galaxies (XMPOs) are objects with a metallicity
lower than 1/10 of the solar value (12+log(O/H) < 7.69). Quiescent XMPs
are difficult to analyse because of their very low metallicity, but
XMP starbursts in the local Universe are ideal sites to study
scenarios of star-formation and galaxy evolution thought to be similar
to the conditions of the primaval building blocks from which larger
systems were formed in the primitive Universe.

The chemical analysis of these SF objects is crucial to identify
them and to explore if their nature is that of truly young, unevolved
objects or dwarf systems rejuvenated by the fall of pristine gas.
In this talk, I will review some of the results of our group in this line of
research by means of the exploration of large deep surveys
(e.g. SDSS, zCOSMOS, VUDS) and detailed optical spatially resolved
observations of a well-known local sample (e.g. IFU observations of IZw18).

Presentation

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