Resolving the 47 Tucanae Distance Problem

(2) South African Astronomical Observatory); David Kilkenny (2) ((1) Liverpool John Moores University; Francois van Wyk (2); Maurizio Salaris (1); Susan M. Percival (1)

arxiv: astro-ph/0209074 · v1 · submitted 2002-09-04 · 🌌 astro-ph

Resolving the 47 Tucanae Distance Problem

Susan M. Percival (1) , Maurizio Salaris (1) , Francois van Wyk (2) , David Kilkenny (2) ((1) Liverpool John Moores University , (2) South African Astronomical Observatory) This is my paper

classification 🌌 astro-ph

keywords distanceclustermodulusfittingtucanaeacquiredapparentapply

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Using a sample of 43 suitable local subdwarfs with newly acquired BVI photometry, we apply our main sequence fitting method to the metal rich Globular Cluster 47 Tucanae. Fitting in 2 colour planes, we find an apparent distance modulus of (m-M)v = 13.37 (+0.10/-0.11), leading to a dereddened distance modulus of (m-M)o = 13.25 (+0.06/-0.07). Consideration of the Red Clump in the cluster produces a distance modulus fully consistent with this result. The implied cluster age is 11 (+/-1.4) Gyr.

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Resolving the 47 Tucanae Distance Problem

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