Figure 3 from Ultraviolet Properties of Galactic Globular Clusters with GALEX. I. The Color-Magnitude Diagrams

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Ultraviolet Properties of Galactic Globular Clusters with GALEX. I. The Color-Magnitude Diagrams

Authors: Ricardo P. Schiavon, Emanuele Dalessandro, Sangmo T. Sohn, Robert T. Rood, Robert W. O'Connell, Francesco R. Ferraro, Barbara Lanzoni, Giacomo Beccari, Soo-Chang Rey, Jaehyon Rhee, R. Michael Rich, Suk-Jin Yoon, and Young-Wook Lee

Schiavon et al. 2012 The Astronomical Journal 143 121.

Provider: AAS Journals

Caption: Figure 3.

FUV and NUV images of 47 Tuc, the reddest cluster in our sample. Note the vast difference in the crowding of the two images, which renders NUV photometry impossible in the cluster core, at the spatial resolution of GALEX. The FUV light of the cluster is due to a few dozen sources, with roughly half of it being due to a single very bright star (47 Tuc BS; O'Connell et al. 1997). Photometry in the FUV is accurate even in the central cluster regions.

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