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Red giant branch bump brightness and number counts in 72 galactic globular clusters observed with the Hubble space telescope

Nataf, David; Gould, A; Pinsonneault, Marc H; Udalski, A


We present the broadest and most precise empirical investigation of red giant branch bump (RGBB) brightness and number counts ever conducted. We implement a new method and use data from two Hubble Space Telescope globular cluster (GC) surveys to measure the brightness and star counts of the RGBB in 72 GCs. The median measurement precision is 0.018 mag in the brightness and 31% in the number counts, respectively, reaching peak precision values of 0.005 mag and 10%. The position of the...[Show more]

CollectionsANU Research Publications
Date published: 2013
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/766/2/77


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