New O3 giants in the Large Magellanic Cloud

Physics – Optics

Scientific paper

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19

Early Stars, Magellanic Clouds, O Stars, Stellar Spectra, Cassegrain Optics, Pixels, Spectrograms, Stellar Luminosity

Scientific paper

Detailed spectral classifications and remarks are given for seven recently discovered, very early O stars of high luminosity in the Large Magellanic Cloud. Three of them are definitely of type O3 III(f*), with weak N IV emission and N V absorption, bringing to five the number of objects in that category, all of them in the Magellanic Clouds; an illustration of their spectra is presented. One definite and two possible O3 objects are located together with several later O-type stars in the remarkable cluster NGC 2122, for which an identification chart is given.

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