Bibcode
Aparicio, A.; Garcia-Pelayo, J. M.; Moles, M.
Referencia bibliográfica
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 74, no. 3, Sept. 1988, p. 367-384. Research supported by Consejo Superior de Investigaciones Cientificas and Universidad de Chile.
Fecha de publicación:
9
1988
Número de citas
18
Número de citas referidas
18
Descripción
CCD photometry of resolved dwarf irregular galaxies was obtained with
the 4-m Cerro Tololo Interamerican Observatory telescope in February
1985. BV data from 77 stars in DDO 187 are used to infer a distance
modulus of 28.2 + or - 0.6, placing this galaxy out of the Local Group,
at a distance of 4.4 + or - 1.0 Mpc. In the second part, UBV photometry
of 142 resolved stars in GR 8 is presented. The results show a distance
modulus of 25.0 for GR 8. It is suggested that metal enriched gas loss
is required (probably together with a low upper mass limit in the IMF)
to explain the metallicity of this galaxy, and that a star formation
burst mode is necessary to explain the blue colors of GR 8.