Fourier-transform spectroscopy and near-infrared variability of eta Carinae

Details Fourier-transform spectroscopy and near-infrared variability of eta Carinae Fourier-transform spectroscopy and near-infrared variability of eta Carinae

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...292..208a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 292, no. 1, p. 208-212

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Computational Astrophysics, Emission Spectra, Infrared Astronomy, Infrared Spectra, Infrared Stars, Near Infrared Radiation, Spectrum Analysis, Stellar Physics, Variability, Fourier Transformation, Infrared Spectroscopy, Line Spectra, Stellar Mass

Scientific paper

We present the first Fourier Transform Spectrograph near-IR spectrum (0.95-2.5 microns) of eta Car observed at CFHT in January 1987 with a resolution of 40-100 km/s. We have identified lines of H I (Paschen, Brackett series), He I, Fe II, (Fe II), (N I) with complex structures. At the time of these observations eta Car was in a low excitation phase characterized by a general weakening of the hydrogen lines, and with the He I lambda 1082.9 nm line much weaker than in 1990-91.

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