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The Full-fledged Dwarf Irregular Galaxy Leo A

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 21 Jul 2004Embargo end date: 01 Jan 2004 France Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 611, pages L93-L96 (issn: 0004-637X, eissn: 1538-4357, Copyright policy )
Authors: Chisato Ikuta; Kouji Ohta; Yoshihiko Yamada; Nobuo Arimoto; Pascale Jablonka; Valdas Vansevicius; Vladas Vansevičius; +4 Authors

doi: 10.1086/423802 , 10.48550/arxiv.astro-ph/0405313

arXiv: http://arxiv.org/abs/astro-ph/0405313

The Full-fledged Dwarf Irregular Galaxy Leo A

Abstract

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.

9 pages, 3 figures, submitted to ApJL

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France
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Keywords

Astrophysics (astro-ph), FOS: Physical sciences, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph], Astrophysics, 520

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    influence
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    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
55
Top 10%
Top 10%
Top 10%
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gold
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