NGC 5018 - A metal-poor giant elliptical

Details NGC 5018 - A metal-poor giant elliptical NGC 5018 - A metal-poor giant elliptical

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...403..573b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 403, no. 2, p. 573-576.

Astronomy and Astrophysics

Astrophysics

21

Elliptical Galaxies, Galactic Structure, Star Formation, Absorption Spectra, Iue, Spectral Energy Distribution, Ultraviolet Spectra

Scientific paper

Far-UV observations are presently used to investigate the origin of the weak Mg2 index in the spectrum of NGC 5018; IUE spectra are obtained for the central regions of the galaxy, in order to detect evidence of ongoing star formation. It is concluded that star formation cannot produce the weak-lined spectrum in question, and that NGC 5018 seems to be a giant elliptical galaxy with the mean metallicity of a dwarf elliptical, representing a class of ellipticals that strongly deviates from the log sigma-Mg2 relationship due to intrinsic differences in their old stellar populations.

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