Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.123..363s&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 123, no. 2, June 1986, p. 363-374.
Astronomy and Astrophysics
Astrophysics
5
Metallicity, Stellar Composition, Stellar Spectrophotometry, Stellar Temperature, Supergiant Stars, Variable Stars, F Stars, Spectral Line Width
Scientific paper
High-dispersion blue spectrograms and BV photometry of the high-latitude F-supergiant HR 4912 = HD 112374 have been obtained. As a result of the curve-of-growth analysis, it is concluded that it might have the parameters of a F-supergiant with slight metal deficiency (Fe/H = - 0.07). The latter depends much upon the derived temperature of HR 4912; hence, special attention is paid to this problem. The blue spectra and new BV photometry made it possible to obtain four independent estimates of the temperature - better than in the previous two studies of HR 4912 in the UV and red regions. Despite all recent efforts in a wide spectral region, the status and origin of HR 4912 remains as yet not established, although it seems to stand much closer to the stars of the UU Herculis type.
Kolev D. Z.
Sasselov Dimitar D.
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