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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 LupiThe 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.
Document ID
19910062703
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Leckrone, David S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wahlgren, Glenn M.
(NASA Goddard Space Flight Center; Computer Sciences Corp. Greenbelt, MD, United States)
Johansson, Sveneric G.
(Lund, University Sweden)
Date Acquired
August 14, 2013
Publication Date
August 10, 1991
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 377
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
91A47326
Distribution Limits
Public
Copyright
Other

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