Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...236..798w&link_type=abstract
Astrophysical Journal, Part 1, vol. 236, Mar. 15, 1980, p. 798-807. Research supported by the Natural Sciences and Engineering
Astronomy and Astrophysics
Astronomy
41
Astronomical Photometry, Energy Distribution, Globular Clusters, Oao, Ultraviolet Astronomy, Ultraviolet Photometry, Hertzsprung-Russell Diagram, Interstellar Gas, Photoionization
Scientific paper
Medium- to broad-band photometry of the integrated light of 23 globular clusters in the wavelength range from 1550 to 4250 Å is presented. There is good agreement with ground-based photometry and recent observations by ANS. The single X-ray cluster in our sample, NGC 1851, does not appear unusual. The photometry can be understood in terms of the kinds of stars already known to exist in globular clusters. In general, there appears to be sufficient short-wavelength radiation in these clusters to ionize any interstellar gas which may be present.
Code Arthur D.
Welch Gary A.
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