Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pkas....9...69w&link_type=abstract
Publications of the Korean Astronomical Society, vol.9, no.1, p.69-84
Astronomy and Astrophysics
Astronomy
Scientific paper
The spectral types of stars can be classified by using Balmer discontinuity(Db) and wavelength(lambda b) expressed in terms of effective temperature appeared in Balmer discontinuity. In this research, in order to classify stars, we used the well established observational data of high dispersion spectrophotometry for the spectral types and luminosity classes of stars in the Breger(1976) catalogue. Balmer discontinuity by effective temperature of stars was accurately measured, and the lambda b was replaced to luminosity classes of MK system, because of the close relationship between the lambda b and luminosity classes. We measured the energy gradient(Theta B) of stars which were expressed as a function of spectral types in the interval of lambda 4000 - 4600 Angstrom, and then obtained a new physical parameter (Theta) from the Db and Theta B. The new parameter, Theta can be used instead of HD classifications of stars and can be used widely for spectrophotometrical classifications of stars.
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