Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...349..369l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 349, Jan. 20, 1990, p. 369-375.
Astronomy and Astrophysics
Astrophysics
18
Absorption Spectroscopy, Radiative Lifetime, Stellar Spectra, Transition Probabilities, Zirconium Oxides, Atmospheric Models, Laser Induced Fluorescence, Molecular Spectroscopy, S Stars, Spectral Bands, Stellar Atmospheres, Stellar Models, Vibrational Spectra
Scientific paper
The absorption bands of ZrO have been observed in stars, particularly S stars. Here, theoretical transition probabilities are presented for the dipole-allowed transitions between the six lowest singlet and triplet states of ZrO. The results should be sufficiently reliable to provide opacity data for use in modeling stellar atmospheres. The theoretical radiative lifetime for the e 3Pi state is less than the experimental value as measured by the decay of resonant fluorescence. However, the theoretical electronic transition moments for the gamma system and the B 1Pi - X 1Sigma(+) system are much smaller than those deduced from emission studies. The calculated lifetime for the C 1Sigma(+) state is in excellent agreement with the laser-induced fluorescence studies. The as yet unobserved E 1Phi - A 1Delta band system is found to be relatively strong.
Bauschlicher Charles W. Jr.
Langhoff Stephen R.
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