Color gradients in the nuclear region of M31

Details Color gradients in the nuclear region of M31 Color gradients in the nuclear region of M31

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...205..360t&link_type=abstract

Astrophysical Journal, vol. 205, Apr. 15, 1976, pt. 1, p. 360-362.

Astronomy and Astrophysics

Astrophysics

9

Abundance, Andromeda Galaxy, Astronomical Spectroscopy, Galactic Nuclei, Heavy Elements, Contamination, Galactic Radiation, Spectrum Analysis, Stellar Spectra

Scientific paper

Spectrophotometric measurements of the nuclear region of M31 under conditions of excellent seeing with M31 near the zenith and using a 3.8-9.9-in. diameter entrance annulus for the bulge along with a 3.6-in. aperture for the nucleus, show that the nuclear region is only slightly redder and shows marginally stronger CN blends than the bulge. The data can be interpreted in terms of an increase in heavy-element abundance toward the center of M31 by a factor substantially less than two.

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