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Atomic Data Requirements for the Analysis of Chemically Peculiar Spectra

Published online by Cambridge University Press:  14 August 2015

D. S. Leckrone ,
S. G. Johansson ,
G. M. Wahlgren ,
T. Brage  and
C. R. Proffitt
D. S. Leckrone
Affiliation:
NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA
S. G. Johansson
Affiliation:
Lund University, LundSweden
G. M. Wahlgren
Affiliation:
Lund University, LundSweden
T. Brage
Affiliation:
Lund University, LundSweden
C. R. Proffitt
Affiliation:
Computer Sciences Corporation and Catholic University of America

Extract

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For the past seven years a large, international team of astrophysicists and atomic physicists has been engaged in the systematic exploration and analysis of the extraordinary spectrum of one chemically-peculiar star, chi Lupi (B9.5pHgMn + A2 Vm). The observational data consist of 345 Ã of the star’s ultraviolet spectrum acquired with the Goddard High Resolution Spectrograph (GHRS) on board the Hubble Space Telescope (HST) at a resolving power of approximately 90,000 and an average S/N ratio of about 75 in the continuum. These data were supplemented with new optical-wavelength echelle spectra obtained at the AAT and at KPNO[l]. We have named this study “The x Lupi Pathfinder Project”, because it is in many respects similar to the initial exploration of a strange new land – never before has the ultraviolet spectrum of an ultra-sharp-lined star been observed at this level of detail and accuracy.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 11 , Issue 2: Highlights of Astronomy. As presented at the XXIIIrd General Assembly of the IAU (Part B), 1997 , 1998 , pp. 650 - 652
Copyright
Copyright © Kluwer 1998

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