The X-ray source in NGC 1851

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Globular Clusters, Periodic Variations, Radial Velocity, Stellar Evolution, X Ray Sources, Astronomical Photometry, Emission Spectra, H Beta Line, X Ray Spectra, X Ray Stars

Scientific paper

Measurements of the radial velocity of the highly evolved star UV5 in
the globular cluster NGC 1851 indicate that it is variable with a 15-day
period. Photometrically, the star does not appear to vary, but H-beta
occasionally shows an emission component. On the basis of these
characteristics, UV5 is put forward as the X-ray source in NGC 1851.

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