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An empirical measure of the rate of white dwarf cooling in 47 Tucanae

Goldsbury, Ryan; Heyl, Jeremy; Richer, Harvey B; Bergeron, P; Dotter, Aaron; Kalirai, Jason S; MacDonald, J; Rich, R M; Stetson, Peter B; Tremblay, P.-E.; Woodley, Kristin A.

Description

We present an empirical determination of the white dwarf cooling sequence in the globular cluster 47 Tucanae. Using spectral models, we determine temperatures for 887 objects from Wide Field Camera 3 data, as well as 292 objects from data taken with the Advanced Camera for Surveys. We make the assumption that the rate of white dwarf formation in the cluster is constant. Stellar evolution models are then used to determine the rate at which objects are leaving the main sequence, which must be the...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/78330
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/760/1/78

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