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Paper detail

Full-Fledged Dwarf Irregular Galaxy Leo A

We have studied Leo A - the isolated and extremely gas rich dwarf irregular galaxy of very low stellar mass and metallicity. Ages of the stellar populations in Leo A are ranging from ~10 Myr to ~10 Gyr. Here we report the discovery of an old stellar halo and a sharp stellar edge. Also we find the distribution of stars extending beyond the gaseous envelope of the galaxy. Therefore, Leo A by its structure as well as stellar and gaseous content is found to resemble massive disk galaxies. This implies that galaxies of very low stellar mass are also able to develop complex structures, challenging contemporary understanding of galaxy evolution.

preprint2004arXivOpen access
Vladas VanseviciusNobuo ArimotoTakashi HasegawaChisato IkutaPascale JablonkaDonatas NarbutisKouji OhtaRima StonkuteNaoyuki TamuraValdas VanseviciusYoshihiko Yamada
astro-ph
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Vladas VanseviciusNobuo ArimotoTakashi HasegawaChisato IkutaPascale JablonkaDonatas NarbutisKouji OhtaRima StonkuteNaoyuki TamuraValdas VanseviciusYoshihiko Yamada

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