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

6th Nuclear Physics in Astrophysics

物理学;天文学

Siqueira-Mello, C.^1 ; Spite, M.^2 ; Barbuy, B.^1 ; Spite, F.^2 ; Caffau, E.^2,3 ; Hill, V.^4 ; Wanajo, S.^5 ; Primas, F.^6 ; Plez, B.^7 ; Cayrel, R.^8 ; Andersen, J.^9,10 ; Nordström, B.^9 ; Sneden, C.^11 ; Beers, T.C.^12,13 ; Bonifacio, P.^2 ; François, P.^8 ; Molaro, P.^14

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

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

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/665/1/012056/pdf
DOI  :  10.1088/1742-6596/665/1/012056

学科分类：天文学(综合)

来源: IOP

【 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.