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2000PASP..112.1177D - Publ. Astron. Soc. Pac., 112, 1177-1187 (2000/September-0)
The evolved red stellar content of M32.
DAVIDGE T.J.
Abstract (from CDS):
A field close to the center of M32 was also observed. The brightest stars within a few arcseconds of the nucleus have K=15.5, and the density of these objects is consistent with that predicted from the outer regions of the galaxy after scaling according to surface brightness. Moreover, the K luminosity function (LF) of bright sources between 20" and 30" of the nucleus is well matched by the LF of the outer regions of the galaxy after accounting for differences in surface brightness and correcting for the effects of crowding. It is concluded that the relative size of the intermediate-age component with respect to other populations does not change with radius over much of the galaxy. However, the integrated J-K color and 2.3 µm CO index change with radius within a few tenths of an arcsecond of the galaxy center, indicating that, contrary to what might be inferred from observations at visible wavelengths, the integrated photometric properties of the central regions of M32 differ from those of the surrounding galaxy.
Abstract Copyright: ∼
Journal keyword(s): galaxies: individual (M32) - Galaxies: Stellar Content - Galaxies: Local Group - Stars: AGB and Post-AGB
Simbad objects: 19
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