Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996cub..rept.....c&link_type=abstract
Technical Report, Colorado Univ. Boulder, CO United States
Astronomy and Astrophysics
Astronomy
Infrared Spectra, Variability, Stellar Spectra, Stellar Evolution, O Stars, Astronomical Spectroscopy, Classifications, Iue, Near Infrared Radiation, Wolf-Rayet Stars, Ultraviolet Spectra
Scientific paper
This contract, and its extensions, has been concerned with observations and analyses of spectroscopic data obtained with the IUE satellite: in particular, with Spectroscopy of WN Stars. Newly acquired near IR spectra of two Of type stars, HD16691 and HD190429, showed emission in the 2.189 micron HeII line. These spectra would rather indicate a classification of WN types. In the optical and UV (with IUE), however, the spectra were those of Of stars; not WN types. This leads to the classification that these stars are 'transition' objects; probably in an evolutionary state between Of and Wolf-Rayet stages. In addition to the work on these two stars, studies of variability in two WN stars are nearing completion.
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