Estimation of spectral classifications for bright northern stars with interesting Stromgren indices

Details Estimation of spectral classifications for bright northern stars with interesting Stromgren indices Estimation of spectral classifications for bright northern stars with interesting Stromgren indices

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26as...39..205o&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 39, Feb. 1980, p. 205-214. Research supported by the Danish Natural Science

Astronomy and Astrophysics

Astrophysics

49

Astronomical Catalogs, Northern Hemisphere, Stellar Spectrophotometry, Ubv Spectra, Astronomical Photometry, B Stars, Classifications, Dwarf Stars, F Stars, Giant Stars, O Stars, Stellar Spectra, Supergiant Stars

Scientific paper

The purpose of this investigation is to provide spectroscopic observers with finding lists of potentially interesting objects. From an unpublished UVBY catalogue of 7026 northern stars (mostly brighter than 8.3m) 1094 objects with interesting combinations of UVBY indices have been selected. Most stars with post-HD classifications have been excluded, as well as late F dwarfs belonging to the intermediate population II. For the 792 remaining stars estimated spectral classifications are given. The techniques and experience from a previous paper dealing with southern stars have been utilized here. Among the predicted spectral classifications are 40 OB stars; 262 Ap, Am, or Fm stars; 16 supergiants of types A to G; 110 bright giants of types A to K (class II); 156 double stars or objects with composite spectra; 26 late F dwarfs; 91 weak-lined dwarf and giant stars of types F to K, including early F-type population II field blue stragglers; and a few possible field horizontal branch stars, lambda Bootis-type stars, and late-type halo giants.

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