Stellar Populations Gradients in Isolated Dwarf Galaxies

Bibcode
2012ASPC..458..287H
Hidalgo, S. L.; LCID Group
Referencia bibliográfica

Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way. Proceedings of the conference held 16-20 May 2011 in Shuzenji, Japan. Edited by W. Aoki, M. Ishigaki, T. Suda, T. Tsujimoto, and N. Arimoto. ASP Conference Proceedings, Vol. 458. San Francisco, CA: Astronomical Society of the Pacific, 2012., p.287

Fecha de publicación:
8
2012
Número de autores
2
Número de autores del IAC
1
Número de citas
1
Número de citas referidas
1
Descripción
We present the star formation history (SFH) as a function of galactocentric radius for a sample of isolated dwarf galaxies from the Local Cosmology from the Isolated Dwarfs (LCID) project. The results show a decrease of the star formation with radius for stars with ages ≤ 9 Gyr. Star formation for ages ≥ 10 Gyr is present regardless of distance to the center. The maximum metallicity of Cetus and Tucana is reached earlier than in LGS-3 and Phoenix although this effect tends to disappear at larger distances from the center. The age-metallicity realtion of LGS-3 and Phoenix is more flat at old ages, increasing at younger ages. The results suggest that, regardless the morphological type, the properties of theses galaxies tend to be the same at larger distances from the center.
Tipo
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