Chemically distinct galactic nuclei

Details Chemically distinct galactic nuclei Chemically distinct galactic nuclei

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992azh....69.1121s&link_type=abstract

Astronomicheskij Zhurnal (ISSN 0004-6299), vol. 69, no. 6, p. 1121-1135.

Mathematics

Logic

34

Absorption Spectra, Galactic Bulge, Galactic Nuclei, Metallicity, Spiral Galaxies, Elliptical Galaxies, Line Spectra, Stellar Spectrophotometry

Scientific paper

Observations with the MPFS panoramic spectrophotometer at the 6-m telescope are reported for 12 galaxies of various morphological types. Radial variations of the equivalent width of the absorption lines MgI 5175 and FeI 5270, 5335 up to radii of 6-10 arcsec are obtained. An uneven increase in metallicity of 4-20 times between the nucleus and its surrounding bulge is found in seven galaxies. It is shown that the jump is related to the dynamical distinction of a galactic nucleus, i.e., its rapid solid-body rotation.

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