The Hamburg/ESO R-process Enhanced Star Survey (HERES) I. Project description, and discovery of two stars with strong enhancements of neutron-capture elements

Christlieb, NorbertBeers, Timothy CBarklem, Paul SBessell, MichaelHill, VHolmberg, JohanKorn, A JMarstellar, BMashonkina, LQian, Y-ZRossi, SilviaWasserburg, G JZickgraf, F-JKratz, K-LNordstrom, BPfeiffer, BRhee, JaehyonRyan, Sean G2015-12-132015-12-130004-6361http://hdl.handle.net/1885/87583We report on a dedicated effort to identify and study metal-poor stars strongly enhanced in r-process elements ([r/Fe] > 1 dex; hereafter r-II stars), the Hamburg/ESO R-process Enhanced Star survey (HERES). Moderate-resolution (∼2 Å) follow-up spectrosKeywords: Absorption; Astronomy; Chronometers; Isotopes; Neutrons; Spectroscopy; Statistical methods; Abundance-stars; Abundances-galaxy; Halo; Population II; Surveys-stars; Galaxies Galaxy: abundances; Galaxy: halo; Stars: abundances; Stars: population II; SurveysThe Hamburg/ESO R-process Enhanced Star Survey (HERES) I. Project description, and discovery of two stars with strong enhancements of neutron-capture elements200410.1051/0004-6361:200415362015-12-12