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Galactic bulges: The importance of early formation scenarios vs. secular evolution

Vogt, Frederic; Ness, Melissa; Freeman, Kenneth


We study the stellar content of three galactic bulges with the high resolution gratings (R=7000) of the WiFeS integral field unit in order to better understand their formation and evolution. In all cases we find that at least 50% of the stellar mass already existed 12 Gyrs ago, more than currently predicted by simulations. A younger component (age between ∼1 to ∼8 Gyrs) is also prominent and its present day distribution seems to be much more affected by morphological structures, especially...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: International Astronomical Union. Proceedings
DOI: 10.1017/S1743921314009569


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