We analyse high-resolution archival UVES data of turnoff and subgiant stars in the nearby globular cluster NGC6397 ([Fe/H] ≈ -2). Balmer-profile analyses are performed to derive reddening-free effective temperatures. Due to the limited S/N and uncertainties related to blaze removal, we find the data quality insufficient to exclude the existence of gravitational settling. If the newly derived effective temperatures are taken as a basis for an abundance analysis, the photospheric iron (Fe II) abundance in the turnoff stars is 0.11 dex lower than in the (well-mixed) subgiants. © 2006 Springer-Verlag Berlin Heidelberg.
CITATION STYLE
Korn, A. J., Piskunov, N., Grundahl, F., Barklem, P., & Gustafsson, B. (2006). Pinning down gravitational settling. ESO Astrophysics Symposia, 2006, 294–297. https://doi.org/10.1007/978-3-540-34136-9_95
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