Seeking footprints of the primeval Universe in dwarf galaxies

Bibcode
2015HiA....16..273H
DOI
10.1017/S1743921314005730
Hidalgo, S. L.
Referencia bibliográfica

Highlights of Astronomy, Volume 16, pp. 273-274

Fecha de publicación:
3
2015
Número de autores
1
Número de autores del IAC
1
Número de citas
0
Número de citas referidas
0
Descripción
We present the star formation histories (SFHs) of four isolated dwarf galaxies, Cetus, Tucana, LGS-3, and Phoenix, as a function of galactocentric radius. Our results suggest that beyond some distance from the center, there are no significative differences in fundamental properties of these galaxies, such as the star formation rate (SFR) or age-metallicity relation (AMR). The stellar content of this region would be composed of old (>~ 10.5 Gyr) metal-poor stars only. In the innermost regions, dwarf galaxies appear to have formed stars during time intervals which duration varies from galaxy to galaxy. This extended star formation produces the dichotomy between dwarf spheroidal (dSph) and dwarf Transition (dTr) galaxy types.
Tipo
Sin árbitro
Galaxias
Grupo local

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