Far-ultraviolet radiation from disk globular clusters

Details Far-ultraviolet radiation from disk globular clusters Far-ultraviolet radiation from disk globular clusters

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...406..489r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 406, no. 2, p. 489-500.

Other

38

Asymptotic Giant Branch Stars, Far Ultraviolet Radiation, Globular Clusters, Metallicity, Ultraviolet Spectra, Cataclysmic Variables, Elliptical Galaxies, Horizontal Branch Stars, Interstellar Extinction, Iue, Stellar Evolution

Scientific paper

IUE spectra obtained in a survey of the metal-rich disk system of globular clusters are presented. Significant FUV fluxes were detected in the 1200-2000-A short-wavelength (SWP) range of the IUE Observatory in several disk globular clusters. These clusters are the most metal-rich known to have an FUV flux. Three clusters show spectral energy distrbutions (SEDs) clearly rising at shorter wavelengths, not unlike the upturns observed in the bulges of metal-rich elliptical galaxies. Several others with weak SWP detections appear to have flat or uncertain spectral energy distributions. Blue stragglers provide a possible explanation for flux redder than 2000 A in clusters showing weaker flux in the SWP region, and with flat or declining SEDs.

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