IUE observations of the nucleus of the galactic globular cluster NGC 2808

Details IUE observations of the nucleus of the galactic globular cluster NGC 2808 IUE observations of the nucleus of the galactic globular cluster NGC 2808

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...121..198c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 121, no. 2, May 1983, p. 198-202.

Astronomy and Astrophysics

Astrophysics

7

Globular Clusters, Horizontal Branch Stars, Iue, Ultraviolet Spectra, Galactic Structure, Hertzsprung-Russell Diagram, Interstellar Extinction, Nuclei, Stellar Luminosity

Scientific paper

The UV spectrum of the nucleus of the galactic globular cluster NGC 2808 shows two distinct components: a point-like one, probably a supra BHB star of about 40,000K in the phase of rapid crossing of the HR diagram from the red giant tip, and a diffuse one, interpreted as a clump of blue HB stars. The contribution of these HB stars produces a cluster spectrum similar to those of the Extremely Blue HB clusters. The UV bright nature of the HB in this metal rich cluster appears related to the HB's in M13-like clusters. The implications of such an occurrence are shortly discussed.

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