Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106.1068h&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 106, no. 704, p. 1068-1074
Astronomy and Astrophysics
Astronomy
8
Chromosphere, Emission Spectra, Line Spectra, Magnesium, Open Clusters, Stellar Activity, Ultraviolet Astronomy, Ultraviolet Spectra, Abundance, Iue, Kinematics, Metallicity
Scientific paper
A 2800 A Mg II line index I(Mg II) that is sensitive to chromospheric activity has been measured from International Ultraviolet Explorer spectra of a sample of eight HR 1614 moving-group dwarfs. All of these dwarfs have values of I(Mg II) indicative of ages greater than or equal to 3 Gyr. The relatively old ages of these dwarfs, together with their similar and peculiar kinematics and high metal abundance, is consistent with, although not conclusive proof of, coeval formation in close physical proximity to each other. The age, chemical abundance, and kinematics of the HR 1614 moving group -- with the notable exception of height above the Galactic plane -- are similar to the properties of the old open cluster NGC 6791.
Hufnagel Beth
Smith Graeme H.
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