Spectral types and luminosity classifications of MAP region stars using UBVRI and DDO photometry

Details Spectral types and luminosity classifications of MAP region stars using UBVRI and DDO photometry Spectral types and luminosity classifications of MAP region stars using UBVRI and DDO photometry

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98.1768c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 98, Nov. 1989, p. 1768-1782.

Astronomy and Astrophysics

Astronomy

13

Astronomical Photometry, Reference Stars, Stellar Luminosity, Stellar Spectra, Ubv Spectra, Astrometry, Color-Color Diagram, Interstellar Extinction, Stellar Parallax

Scientific paper

UBVRI and DDO photometry of reference stars used in the Allegheny Observatory (AO) astrometric program was obtained to determine spectral types and luminosity classifications. The photometric spectral types are consistent with published spectral types to within 2.5 spectral subclasses. Luminosity classifications are within half of a luminosity class of the published values. The spectral types and the luminosity classes are used to determine the absolute visual magnitudes from which photometric parallaxes may be determined for use in the AO astrometric program.

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