The pursuit of heavy elements in the HgMn-type star Chi Lupi: Observations with the GHRS in the COSTAR ERA

Research output: Contribution to journalArticle

Abstract

Observations of the ultra-sharp-lined HgMn star chi Lupi made with the Goddard High Resolution Spectrograph after the Hubble Space Telescope First Servicing Mission display the effect of COSTAR corrective optics upon the spectral resolution of several observing modes. The resolution is restored to levels expected in the absence of the telescope spherical aberration for all observations made through the GHRS Large Science Aperture (LSA). The Small Science Aperture (SSA) spectra are nearly identical in resolution to the pre-COSTAR values while benefiting from higher throughput. The line spread function for the LSA relative to the SSA shows little wavelength dependence and reflects a Gaussian profile approximately 20%-30% broader than for SSA spectra. Absorption features containing components of As II and Bi II represent upper limit enhancements of 2.9 and 2.1 dex for As II and Bi II, respectively, relative to meteoritic abundance determinations.

Details

Authors
  • Glenn Wahlgren
  • Tomas Brage
  • RL GILLILAND
  • Sveneric Johansson
  • DS Leckrone
  • DJ Lindler
  • Ulf Litzén
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Astronomy, Astrophysics and Cosmology

Keywords

  • ABUNDANCES, INDIVIDUAL (CHI-LUPI), STARS, PECULIAR, ULTRAVIOLET
Original languageEnglish
Pages (from-to)L67-L70
JournalAstrophysical Journal
Volume435
Issue number1
Publication statusPublished - 1994
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Lund Observatory (000006111), Science (000006100), Physics, science (011013100)