Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98.1285f&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 98, Oct. 1989, p. 1285-1304.
Astronomy and Astrophysics
Astronomy
93
Color-Magnitude Diagram, Dwarf Galaxies, Elliptical Galaxies, Local Group (Astronomy), Stellar Spectrophotometry, Astronomical Catalogs, Background Radiation, Charge Coupled Devices, Stellar Luminosity
Scientific paper
Using the CCD camera on the Canada-France-Hawaii Telescope, color-magnitude (C-M) diagrams were obtained for brightest stars of the Local Group dwarf elliptical galaxy M32. Both the I vs (V-I) and I vs (R-I) CCD C-M diagrams reveal a red population of stars, the brightest of which resolve at I of about 19.5 mag. Data on the (V-I) and (R-I) colors indicate that the mean metallicity of M32 is greater than that of the most metal-rich Galactic globular clusters. A discontinuity in the I band luminosity function of the M32 was observed, which, if the distance modulus of M32 is comparable to that of M31, is consistent with the appearance of the tip of the first red giant branch in this galaxy.
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