The ultraviolet IUE spectrum of the population II horizontal-branch A star HD 109995

Details The ultraviolet IUE spectrum of the population II horizontal-branch A star HD 109995 The ultraviolet IUE spectrum of the population II horizontal-branch A star HD 109995

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...162..373a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 162, no. 1-2, July 1986, p. 373-376.

Astronomy and Astrophysics

Astronomy

2

A Stars, Astronomical Spectroscopy, Horizontal Branch Stars, Ultraviolet Astronomy, High Dispersion Spectrographs, Iue, Line Spectra, Metallicity, Wavelengths

Scientific paper

Eight SWP and six LWP high dispersion IUE images of the field horizontal-branch A star HD 109995 have been averaged to increase the signal-to-noise ratio. The line density in the ultraviolet is greater than that of the optical region, but less than that of comparable Population I A stars. Many of the identified lines are those of Fe II. Lines of C I, C II, N I, O I, Mg I, Mg II, Al II, Al III, Si I, Si II, P II, S I, Cl I, Ti II, V II, Cr II, Mn II, Fe I, Co II, Ni II, Zn II, and Ge II are also present. Definite interstellar lines of C II, Mg I, Mg II, Al II, Si II, and Fe II were found.

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