Theoretical and observed UV energy distributions of 7 globular clusters

Details Theoretical and observed UV energy distributions of 7 globular clusters Theoretical and observed UV energy distributions of 7 globular clusters

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....99..120n&link_type=abstract

Astronomy and Astrophysics, vol. 99, no. 1, June 1981, p. 120-125.

Astronomy and Astrophysics

Astronomy

13

Astronomical Models, Star Clusters, Star Distribution, Stellar Spectrophotometry, Ultraviolet Astronomy, Astronomical Netherlands Satellite, Iue, Oao 2, Red Giant Stars, Spectral Energy Distribution, Ultraviolet Spectra, X Ray Astronomy

Scientific paper

A grid of synthetic UV spectra is computed and the effects of the various parameters are shown. A comparison with the integrated spectra of 7 globular clusters is made with satisfactory results, suggesting that constraints on the HB morphology and the chemical composition may be achieved on the basis of the UV fluxes alone. A spread in the observed UV fluxes similar to that discovered by ANS is found, clearly requiring a second parameter to describe HB morphologies. No UV excesses are found in the core of two X-rays clusters. The presence of UV-bright stars is investigated.

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