Browsing Research publications by Author "Charbonnel, C."
Now showing items 1-7 of 7
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Are there any first-generation stars in globular clusters today?
Charbonnel, C.; Chantereau, W.; Krause, M.; Primas, F.; Wang, Y. (2014-09-22)Context. Several models compete to explain the abundance properties of stellar populations in globular clusters. One of the main constraints is the present-day ratio of first- and second-generation stars that are currently ... -
Boron depletion in 9 to 15 M(circle dot) stars with rotation
Frischknecht, U.; Hirschi, R.; Meynet, G.; Ekstroem, S.; Georgy, C.; Rauscher, T.; Winteler, C.; Thielemann, F-K. (Cambridge University Press, 2010)The treatment of mixing is still one of the major uncertainties in stellar evolution models. One open question is how well the prescriptions for rotational mixing describe the real effects. We tested the mixing prescriptions ... -
The chemical composition of TS 01, the most oxygen-deficient planetary nebula AGB nucleosynthesis in a metal-poor binary star
Stasinska, G.; Morisset, C.; Tovmassian, G.; Rauch, T.; Richer, M.G.; Pena, M.; Szczerba, R.; Decressin, T.; Charbonnel, C.; Yungelson, L.; Napiwotzki, R.; Simon-Diaz, S.; Jamet, L. (2010)The planetary nebula TS 01 (also called PN G 135.9+55.9 or SBS 1150+599A) with its record-holding low oxygen abundance and its double degenerate close binary core (period 3.9 h) is an exceptional object located in the ... -
Did globular clusters contribute to the stellar population of the Galactic halo?
Charbonnel, C.; Krause, M. (2016-05-09)The origin of Galactic halo stars and the contribution of globular clusters (GC) to this stellar population have long been (and still are) debated. The discovery of multiple stellar populations with peculiar chemical ... -
Gas expulsion in massive star clusters?. Constraints from observations of young and gas-free objects
Krause, M.~G.~H.; Charbonnel, C.; Bastian, N.; Diehl, R. (2016-03-01)Context. Gas expulsion is a central concept in some of the models for multiple populations and the light-element anti-correlations in globular clusters. If the star formation efficiency was around 30 per cent and the gas ... -
Superbubble dynamics in globular cluster infancy. I. How do globular clusters first lose their cold gas?
Krause, M.; Charbonnel, C.; Decressin, T.; Meynet, G.; Prantzos, N.; Diehl, R. (2012-10-05)The picture of the early evolution of globular clusters has been significantly revised in recent years. Current scenarios require at least two generations of stars of which the first generation (1G), and therefore also the ... -
Superbubble dynamics in globular cluster infancy. II. Consequences for secondary star formation in the context of self-enrichment via fast-rotating massive stars
Krause, M.; Charbonnel, C.; Decressin, T.; Meynet, G.; Prantzos, N. (2013-04-12)Context. The self-enrichment scenario for globular clusters (GC) requires large amounts of residual gas after the initial formation of the first stellar generation. Recently, we found that supernovae may not be able to ...