Stellar Populations in the Central Region of the Dwarf Elliptical Galaxy NGC 205

Details Stellar Populations in the Central Region of the Dwarf Elliptical Galaxy NGC 205 Stellar Populations in the Central Region of the Dwarf Elliptical Galaxy NGC 205

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aj....112.1438l&link_type=abstract

Astronomical Journal v.112, p.1438

Astronomy and Astrophysics

Astronomy

42

Galaxies: Individual: Ngc 205, Galaxies: Elliptical And Lenticular, Galaxies: Stellar Content

Scientific paper

BVRI CCD photometry of ~2,300 stars in the central 2.2" x 3.5" area of the dwarf elliptical galaxy NGC 205 in the Local Group is presented. The color-magnitude diagrams of NGC 205 show: (1) a blue plume around (B- V) ~ 0.0 mag, extending up to V ~ 19.3 mag (M_v_ ~-5.4 mag); and (2) a strong asymptotic giant branch (AGB) population, the brightest of which reaches I ~ 19.0 mag, 1.5 mag brighter than the tip of the red giant branch. BVRI photometry of three globular clusters (Hubble IV, V, and VI) is also presented. Hubble V is much bluer [(B - V) = 0.37] than other globular clusters. This blue color of Hubble V leads to an estimate of the age, ~300 Myrs. A V luminosity function for the blue stars has been derived: the logarithmic slope of the luminosity function for - 5.7

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