The extension of the MK spectral classification system to the intermediate population II F type stars

Details The extension of the MK spectral classification system to the intermediate population II F type stars The extension of the MK spectral classification system to the intermediate population II F type stars

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98.1049g&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 98, Sept. 1989, p. 1049-1062.

Astronomy and Astrophysics

Astronomy

33

Classifications, F Stars, Metallicity, Stellar Spectra, Astronomical Catalogs, Stellar Luminosity, Stellar Spectrophotometry, Ubv Spectra, Visual Photometry

Scientific paper

A grid of metal-weak spectral-classification standards is used to systematically extend the MK spectral-classification system to F-type stars of the intermediate population II. The present method allows metal-weak program stars to be compared with standards of similar metallicity and effective temperature. The results demonstrate that the intermediate population II is very homogeneous. Excellent agreement is obtained between the classifications of the present extended system and uvby-beta photometric results.

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