The Full-fledged Dwarf Irregular Galaxy Leo A | Zendy

V. Vansevičius | Zendy; N. Arimoto | Zendy; Takashi Hasegawa | Zendy; Chisato Ikuta | Zendy; P. Jablonka | Zendy; D. Narbutis | Zendy; Kouji Ohta | Zendy; R. Stonkutė | Zendy; Naoyuki Tamura | Zendy; Valdas Vansevičius | Zendy; Yoshihiko Yamada | Zendy

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The Full-fledged Dwarf Irregular Galaxy Leo A

Author(s) -

V. Vansevičius,

N. Arimoto,

Takashi Hasegawa,

Chisato Ikuta,

P. Jablonka,

D. Narbutis,

Kouji Ohta,

R. Stonkutė,

Naoyuki Tamura,

Valdas Vansevičius,

Yoshihiko Yamada

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/423802

Subject(s) - physics , astrophysics , dwarf galaxy , irregular galaxy , galaxy , astronomy , metallicity , interacting galaxy , dwarf spheroidal galaxy

We have studied Leo A - the isolated and extremely gas rich dwarf irregulargalaxy of very low stellar mass and metallicity. Ages of the stellarpopulations in Leo A are ranging from ~10 Myr to ~10 Gyr. Here we report thediscovery of an old stellar halo and a sharp stellar edge. Also we find thedistribution of stars extending beyond the gaseous envelope of the galaxy.Therefore, Leo A by its structure as well as stellar and gaseous content isfound to resemble massive disk galaxies. This implies that galaxies of very lowstellar mass are also able to develop complex structures, challengingcontemporary understanding of galaxy evolution.Comment: 9 pages, 3 figures, submitted to ApJ

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