UBV photometry of new H-alpha stars in the association Orion OB1d

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astronomical Photometry, Flare Stars, Hertzsprung-Russell Diagram, Ubv Spectra, H Alpha Line, Star Clusters, Stellar Color, Tables (Data)

Scientific paper

The results of UBV photometry of new Hα stars in the Orion OB1d
association are presented. Photometric UBV data for 92 emission stars
are obtained. The observed stars are located above the main sequence on
the U-B, B-V diagram. This indicates the existence of ultraviolet excess
in their spectra.

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