s- and r-process element abundances in the CMD of 47 Tucanae using the Robert Stobie Spectrograph on SALT

Details s- and r-process element abundances in the CMD of 47 Tucanae using the Robert Stobie Spectrograph on SALT s- and r-process element abundances in the CMD of 47 Tucanae using the Robert Stobie Spectrograph on SALT

2008-02-04

arxiv.org/abs/0802.0324v1

Astronomy and Astrophysics

Astrophysics

7 pages, 11 figures

Scientific paper

10.1071/AS07031

A recent study by Wylie et al 2006 has revealed that s-process element abundances are enhanced relative to iron in both red giant branch and asymptotic giant branch stars of 47 Tucanae. A more detailed investigation into s-process element abundances throughout the colour-magnitude diagram of 47 Tucanae is vital in order to determine whether the observed enhancements are intrinsic to the cluster. This paper explores this possibility through observational and theoretical means. The visibility of s- and r-process element lines in synthetic spectra of giant and dwarf stars throughout the colour magnitude diagram of 47 Tucanae has been explored. It was determined that a resolving power of 10 000 was sufficient to observe s-process element abundance variations in globular cluster giant branch stars. These synthetic results were compared with the spectra of eleven 47 Tucanae giant branch stars observed during the performance verification of the Robert Stobie Spectrograph on the Southern African Large Telescope. Three s-process elements, Zr, Ba, Nd, and one r-process element, Eu, were investigated. No abundance variations were found such that [X/Fe] = 0.0 +/- 0.5 dex. It was concluded that this resolving power, R ~ 5000, was not sufficient to obtain exact abundances but upper limits on the s-process element abundances could be determined.

Affiliated with

Also associated with

No associations

Rating

s- and r-process element abundances in the CMD of 47 Tucanae using the Robert Stobie Spectrograph on SALT does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with s- and r-process element abundances in the CMD of 47 Tucanae using the Robert Stobie Spectrograph on SALT, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and s- and r-process element abundances in the CMD of 47 Tucanae using the Robert Stobie Spectrograph on SALT will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-236580