Spectroscopy of an extremely blue star in the globular cluster NGC 2298

Details Spectroscopy of an extremely blue star in the globular cluster NGC 2298 Spectroscopy of an extremely blue star in the globular cluster NGC 2298

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106..718w&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 106, no. 701, p. 718-721

Astronomy and Astrophysics

Astronomy

Astronomical Spectroscopy, Blue Stars, Dwarf Stars, Galactic Halos, Globular Clusters, Helium, Milky Way Galaxy, O Stars, Stellar Spectra, Absorption Spectra, Astronomical Photometry, Charge Coupled Devices, Hydrogen, Line Spectra, Stellar Color, Stellar Magnitude, Visible Spectrum

Scientific paper

We present spectroscopy of an extremely blue star found in the Galactic globular cluster NGC 2298. Previous CCD photometry gave a magnitude V = 18.79 +/- 0.15 and a color B-V = -0.34 +/- 0.10. Our visual spectrum reveals a number of He II and H I absorption lines, indicating that this object is a hot helium-rich subdwarf O star, similar to the He-sdO stars found in the Galactic halo.

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