HST/STIS abundances in the uranium rich metal poor star CS 31082-001: Constraints on the r-Process

[摘要] As a brief revision, the origin of heavy elements and the role of abundances in extremely metal-poor (EMP) stars are presented. Heavy element abundances in the EMP uranium-rich star CS 31082-001 based mainly on near-UV spectra from STIS/HST are presented. These results should be useful for a better characterisation of the neutron exposure(s) that produced the r-process elements in this star, as well as a guide for improving nuclear data and astrophysical site modelling, given that the new element abundances not available in previous works (Ge, Mo, Lu, Ta, W, Re, Pt, Au, and Bi) make CS 31082-001 the most completely well studied r-II object, with a total of 37 detections of n-capture elements.

[发布机构] IAG, Universidade de São Paulo, Cidade Universitária, Rua do Matão 1226, São Paulo; 05508-900, Brazil^1;GEPI, Observatoire de Paris, CNRS, UMR 8111, Meudon Cedex; 92195, France^2;Zentrum für Astronomie, Universität Heidelberg, Landessternwarte, Königstuhl 12, Heidelberg; 69117, Germany^3;Laboratoire Lagrange, UMR 7293, Université de Nice Sophia-Antipolis, CNRS, Observatoire de la Côte d'Azur, Nice; 06300, France^4;National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo; 181-8588, Japan^5;European Southern Observatory, Karl Schwarzschild Strasse 2, Garching bei München; 85748, Germany^6;LUPM, CNRS, UMR 5299, Université de Montpellier II, Montpellier Cedex 05; 34095, France^7;GEPI, Observatoire de Paris, CNRS, UMR 8111, 61 Av. de l'Observatoire, Paris; 75014, France^8;Niels Bohr Institute, Juliane Maries Vej 30, Copenhagen; 2100, Denmark; (10) Nordic Optical Telescope, Apartado 474, Santa Cruz de La Palma; 38700, Spain; (11) University of Texas at Austin, Department of Astronomy, Austin; TX; 78712, United States; (12) National Optical Astronomy Observatory, Tucson; MI; 85719, United States; (13) Michigan State University, Department of Physics and Astronomy, JINA, Joinst Institute for Nuclear Physics, East Lansing; MI; 48824, United States; (14) INAF, Osservatorio Astronomico di Trieste, via Tiepolo 11, Trieste; 34143, Italy^9

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Element abundances;Heavy elements;Metal-poor star;Near uv;Neutron exposure;Nuclear data;R-process