Field horizontal-branch stars at ultraviolet and visual wavelengths

Details Field horizontal-branch stars at ultraviolet and visual wavelengths Field horizontal-branch stars at ultraviolet and visual wavelengths

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89..851h&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, June 1984, p. 851-862.

Astronomy and Astrophysics

Astronomy

34

Horizontal Branch Stars, Stellar Spectra, Ultraviolet Astronomy, Visible Spectrum, Atmospheric Models, Iue, Line Spectra, Metallicity, Stellar Atmospheres

Scientific paper

The spectra of 17 field horizontal-branch (FHB) stars, observed at about 5-Å resolution between 1150 and 3200 Å with the International Ultraviolet Explorer and about 8-Å resolution between 3600 and 5800 Å with the Reticon of Pine Bluff Observatory are compared with data of Population I stars of similar temperatures and with theoretical model atmospheres. The FHB stars have weaker spectral lines and are brighter than Population I stars at wavelengths below 1800 Å. The models are too bright below 1600 Å to properly match the Population II star energy distributions. The authors arrive at temperatures for the FHB stars which are consistent for the wavelength range observed.

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