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1979•The Astrophysical Journal Supplement SeriesRequires access

Observational studies of pre-main-sequence evolution

M. Cohen, L. V. Kuhi

Open publisher page 804 citations

Abstract

Optical scanner data from 4270 to 6710 A with a resolution of 7 A were obtained for some 500 H-alpha stars. The data were used to obtain spectral types, reddening coefficients, and emission line strengths; in addition, they are combined with IR broadband measurements out to 3.5 microns to provide bolometric luminosities and effective temperatures. H-R diagrams are presented for the Taurus-Auriga complex, Orion, NGC 2264, NGC 7000/IC 5070, and the Rho Ophiuci association. Some general conclusions are presented.

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What this paper is about

Optical scanner data from 4270 to 6710 A with a resolution of 7 A were obtained for some 500 H-alpha stars. The data were used to obtain spectral types, reddening coefficients, and emission line strengths; in addition, they are combined with IR broadband measurements out to 3.5 microns to provide bolometric luminosities and effective temperatures. H-R diagrams are presented for the Taurus-Auriga complex, Orion, NGC 2264, NGC 7000/IC 5070, and the Rho Ophiuci association. Some general conclusions are presented.

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Available abstract

Optical scanner data from 4270 to 6710 A with a resolution of 7 A were obtained for some 500 H-alpha stars. The data were used to obtain spectral types, reddening coefficients, and emission line strengths; in addition, they are combined with IR broadband measurements out to 3.5 microns to provide bolometric luminosities and effective temperatures. H-R diagrams are presented for the Taurus-Auriga complex, Orion, NGC 2264, NGC 7000/IC 5070, and the Rho Ophiuci association. Some general conclusions are presented.

Key concepts: Physics, Hertzsprung–Russell diagram, Astrophysics, Young stellar object, Stellar evolution, Luminosity, Astronomy, Stars

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