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, Norbert; Beers, Timothy C; Barklem, Paul S; Bessell, Michael; Hill, V; Holmberg, Johan; Korn, A J; Marstellar, B; Mashonkina, L; Qian, Y-Z; Rossi, Silvia; Wasserburg, G J; Zickgraf, F-J; Kratz, K-L; Nordstrom, B; Pfeiffer, B; Rhee, Jaehyon; Ryan, Sean G

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

Date

2004

Authors

Christlieb, Norbert

Beers, Timothy C

Barklem, Paul S

Bessell, Michael

Hill, V

Holmberg, Johan

Korn, A J

Marstellar, B

Mashonkina, L

Qian, Y-Z

Publisher

Springer

Abstract

We 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 spectros