D. Massari, F. R. Ferraro, E. Dalessandro, B. Lanzoni, A. Mucciarelli, L. Origlia
Published 2013-01-11Version 1
Terzan 5 is a stellar system located in the Galactic Bulge, at a distance of 5.9 kpc. Recent discoveries show that it hosts two stellar populations with different iron abundance ({\Delta}[Fe/H]=0.5). Such a large difference has been measured only in {\omega} Centauri in the Galactic halo. Moreover no anticorrelation is observed in Terzan 5, hence it is not a genuine globular cluster. The observed chemical patterns are strikingly similar to those observed in the Bulge stars. This suggests that Terzan 5 is a remnant fragment of the Galactic bulge.
Comments: 4 pages, 6 figures (conference proceedings). "Reading the book of globular clusters with the lens of stellar evolution" (Rome, Nov 2012). To be published in a dedicate volume of the Memorie della Societa' Astronomica Italiana
Terzan 5: a pristine fragment of the Galactic Bulge?
ARGOS III: Stellar Populations in the Galactic Bulge of the Milky Way
TERZAN 5: the remnant of a pristine fragment of the Galactic Bulge?
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