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The abundances of Pt, Au, and HG in the chemically peculiar HgMn-type stars kappa CANCRI and chi LUPI

In English

Författare

  • Glenn Wahlgren
  • DS Leckrone
  • SG Johansson
  • M Rosberg
  • Tomas Brage

Summary, in English

Echelle mode spectra obtained with the Goddard High Resolution Spectrograph onboard the Hubble Space Telescope have been used to determine the abundances of the heavy elements Pt, Au, and Hg in the chemically peculiar HgMn-type stars kappa Cancri and chi Lupi. The abundances were determined by fitting observed line profiles with synthetically generated spectra and are found to be enhanced relative to solar system values by between three and five orders of magnitude in both stars. The Hg isotope mixture in kappa Cancri is found to resemble the terrestrial mixture while that of chi Lupi is dominated by the heaviest isotope. As determined from multiple ionization states, the abundances place constraints upon theories attempting to explain the large surficial abundances of heavy elements.

Publiceringsår

1995

Språk

Engelska

Sidor

438-451

Publikation/Tidskrift/Serie

Astrophysical Journal

Volym

444

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

American Astronomical Society

Ämne

  • Astronomy, Astrophysics and Cosmology

Nyckelord

  • CANCRI
  • INDIVIDUAL (KAPPA
  • ABUNDANCES
  • CHEMICALLY PECULIAR
  • STARS
  • CHI LUPI)
  • ULTRAVIOLET
  • SPECTRA

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0004-637X