Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...230l..89d&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 230, June 1, 1979, p. L89-L93.
Astronomy and Astrophysics
Astronomy
41
Astronomical Spectroscopy, Globular Clusters, Ultraviolet Astronomy, Ultraviolet Spectroscopy, X Ray Sources, Giant Stars, Iue, Spaceborne Astronomy
Scientific paper
Ultraviolet spectra of six globular clusters (M15, M92, NGC 1851, NGC 6624, 47 Tuc, and NGC 6752) have been taken with the International Ultraviolet Explorer satellite in order to investigate the surface brightness distributions in the central regions. The ultraviolet emission indicates composite stellar spectra. Short-wavelength emission (1200-1900 A) arises from blue horizontal-branch stars; long-wavelength emission (2100-3000 A) is characteristic of late-type horizontal-branch and giant stars. The surface brightness distribution is more compact at short wavelengths than at long wavelengths, suggesting a segregation of horizontal-branch stars. A dense core appears to be present in X-ray-emitting clusters and absent in those clusters without X-ray sources. The X-ray source in NGC 6624 may have been detected at short wavelengths (1300-1900 A).
Black John Harry
Davis Raymond Jr.
Dupree Andrea K.
Gursky Herbert
Hartmann Lee
No associations
LandOfFree
Ultraviolet spectroscopic measurements of globular clusters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Ultraviolet spectroscopic measurements of globular clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultraviolet spectroscopic measurements of globular clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1775981