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

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, , Citation C Siqueira-Mello et al 2016 J. Phys.: Conf. Ser. 665 012056 DOI 10.1088/1742-6596/665/1/012056

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cesar.mello@usp.br

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1 IAG, Universidade de São Paulo, Rua do Matão 1226, Cidade Universitária, 05508-900 São Paulo, Brazil

2 GEPI, Observatoire de Paris, CNRS, UMR 8111, 92195 Meudon Cedex, France

3 Zentrum für Astronomie der Universität Heidelberg, Landessternwarte, Königstuhl 12, 69117 Heidelberg, Germany

4 Laboratoire Lagrange, UMR 7293, Université de Nice Sophia-Antipolis, CNRS, Observatoire de la Côte d'Azur, 06300 Nice, France

5 National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, 181-8588 Tokyo, Japan

6 European Southern Observatory, Karl Schwarzschild Strasse 2, 85748 Garching bei München, Germany

7 LUPM, CNRS, UMR 5299, Université de Montpellier II, 34095 Montpellier Cedex 05, France

8 GEPI, Observatoire de Paris, CNRS, UMR 8111, 61 Av. de l'Observatoire, 75014 Paris, France

9 The Niels Bohr Institute, Juliane Maries Vej 30, 2100 Copenhagen, Denmark

10 Nordic Optical Telescope, Apartado 474, 38700 Santa Cruz de La Palma, Spain

11 University of Texas at Austin, Department of Astronomy, Austin, TX 78712, USA

12 National Optical Astronomy Observatory, Tucson, MI 85719, USA

13 Michigan State University, Department of Physics & Astronomy, and JINA, Joinst Institute for Nuclear Physics, East Lansing, MI 48824, USA

14 INAF - Osservatorio Astronomico di Trieste, via Tiepolo 11, 34143 Trieste, Italy

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1742-6596/665/1/012056

Abstract

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.

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10.1088/1742-6596/665/1/012056