Spectroscopy of dwarf O stars in the region 6250 to 7150 Å

Christopher E. Groppi, Margaret M. Hanson

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We present moderate-resolution spectra of normal dwarf O stars taken over the commonly ignored spectral range from 6250 to 7150 Å. Numerous, strong, telluric absorption features, particularly the prominent O2 feature beyond 6850 Å, have made the study of stellar photospheres over this spectral region very difficult in the past. In this study, we use a method for removing the atmospheric absorption features during the reduction process. With our cleaned spectra, we have been successful in identifying the He II 6891 Å line in O dwarf stars that has until now been too heavily contaminated by telluric features to be clearly detected.

Original languageEnglish (US)
Pages (from-to)575-579
Number of pages5
JournalPublications of the Astronomical Society of the Pacific
Issue number725
StatePublished - Jul 1996
Externally publishedYes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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