First results from the Goddard High-Resolution spectrograph - High-resolution observations of the 1942 A resonance line of HG II in the chemically peculiar B star, Chi LUPI

Abstract

view Abstract Citations (74) References (19) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS First Results from the Goddard High-Resolution Spectrograph: High-Resolution Observations of the 1942 Angstrom Resonance Line of HG II in the Chemically Peculiar B Star, chi LUPI Leckrone, David S. ; Wahlgren, Glenn M. ; Johansson, Sveneric G. Abstract The Goddard High-Resolution Spectrograph on the HST has been used to obtain high S/N observations of the sharp-lined, Hg- and Pt-rich B-type star, Chi Lupi, with a resolving power of 87,000. The observations reveal a level of spectroscopic detail never before observed at ultraviolet wavelengths for any star other than the sun. Concentrating on the region around the resonance line of Hg II at 1942 A, the profile and central position of this line confirm beyond doubt that the Hg isotope anomaly in Chi Lupi is real and extreme, with Hg being heavily concentrated in the form of Hg-204. The problems in atomic physics which impair the accurate analysis of spectra of this quality are emphasized. Publication: The Astrophysical Journal Pub Date: August 1991 DOI: 10.1086/186111 Bibcode: 1991ApJ...377L..37L Keywords: B Stars; Mercury (Metal); Peculiar Stars; Resonance Lines; Spectrographs; Ultraviolet Spectra; High Resolution; Hubble Space Telescope; Line Shape; Astrophysics; ATOMIC PROCESSES; DIFFUSION; LINE PROFILES; STARS: ABUNDANCES; STARS: INDIVIDUAL CONSTELLATION NAME: CHI LUPI; STARS: PECULIAR A; ULTRAVIOLET: SPECTRA full text sources ADS | data products MAST (2) SIMBAD (1) INES (1) ESA (1)