Abstract
view Abstract Citations (28) References (55) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The chemical inhomogeneity of the Draco dwarf spheroidal galaxy. Smith, G. H. Abstract Spectra of 7-Å resolution have been obtained of six red giants in the Draco dwarf spheroidal galaxy by using the Multiple Mirror Telescope. The new spectra confirm that a range in calcium abundance exists among the Draco giants. The calcium variations are also accompanied by correlated variations of the CN and G bands. Most Draco stars appear to be intermediate between M92 and M13 in their heavy-element abundances. The MMT spectra also indicate that one star, 361, has a [C/Fe] ratio higher than is typical of globular clusters. A reanalysis of DDO photometry published by Hartwick and McClure indicates that [C/Fe] enhancements are present among other Draco giants. A possible origin for the Draco anomalies is discussed, and similarities to the globular cluster ω Cen are pointed out. It is suggested that Draco formed from a relatively massive (≡106M_sun;) gas cloud. Publication: The Astronomical Journal Pub Date: June 1984 DOI: 10.1086/113574 Bibcode: 1984AJ.....89..801S Keywords: Abundance; Astronomical Spectroscopy; Chemical Composition; Dwarf Galaxies; Inhomogeneity; Carbon; Globular Clusters; Iron; Red Giant Stars; Spheroids; Astrophysics full text sources ADS | data products SIMBAD (4) NED (1)
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