Iron-peak abundances in the nuclear regions of M31, M81, and M94

Details Iron-peak abundances in the nuclear regions of M31, M81, and M94 Iron-peak abundances in the nuclear regions of M31, M81, and M94

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240..768p&link_type=abstract

Astrophysical Journal, Part 1, vol. 240, Sept. 15, 1980, p. 768-778. Research supported by the National Research Council of Can

Astronomy and Astrophysics

Astrophysics

16

Abundance, Andromeda Galaxy, Galactic Nuclei, Iron, Metallic Stars, Stellar Spectrophotometry, Globular Clusters, Infrared Spectrophotometers, Near Infrared Radiation, Signal To Noise Ratios, Star Distribution, Stellar Spectra

Scientific paper

The high signal-to-noise ratio near-infrared spectrophotometry determined for the nuclear regions of the galaxies M31, M81, and M94 show blends of weak lines identified in G, K, and M stars in the spectral region near gamma 7400. An index measuring the integrated strengths of these blends was calibrated vs effective temperature and metal abundance in the standard stars; the data show near-solar abundances of Fe-elements for super-rich stars. It was concluded that selective overabundances relative to Fe may exist in the nuclei of luminous galaxies; however, lower abundances for metal-rich globular clusters decrease previous abundance estimates in galaxies.

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