Ultraviolet Morphologies of Globular Clusters Observed with the Ultraviolet Imaging Telescope

Details Ultraviolet Morphologies of Globular Clusters Observed with the Ultraviolet Imaging Telescope Ultraviolet Morphologies of Globular Clusters Observed with the Ultraviolet Imaging Telescope

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...418..850s&link_type=abstract

Astrophysical Journal v.418, p.850

Astronomy and Astrophysics

Astronomy

8

Galaxy: Globular Clusters: General, Stars: Horizontal-Branch, Ultraviolet: Stars

Scientific paper

We compare the ultraviolet (UV) and visible morphologies of globular clusters M3, M13, M79, and ω Cen, based on observations with the Ultraviolet Imaging Telescope (UIT) and ground-based telescopes. Global similarities (e.g., core radii) are found, along with other interesting features. These include a ring (r = 2'.2) of UV-bright stars in ω Cen and a group of UV-bright objects near the center of M79. We find a color gradient in M79 but in no other cluster. The helium abundance in M79 is Y = 0.21±004 based on UV and visible color-magnitude diagrams.

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