Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....67..281t&link_type=abstract
Astronomy and Astrophysics, vol. 67, no. 2, July 1978, p. 281-285. Research supported by the Science Research Council of Englan
Astronomy and Astrophysics
Astrophysics
1
Atmospheric Models, Hydroxyl Emission, Opacity, Satellite Observation, Stellar Atmospheres, Absorption Spectra, F Stars, Spectral Bands, Stellar Spectra, Stellar Temperature, Ultraviolet Radiation
Scientific paper
Model atmospheres have been constructed including OH bound-free opacity for temperatures corresponding to F stars. The emergent fluxes from the models have been compared with their values observed from the TD1 satellite. It has been found that OH bound-free opacity is not very important for F0 V stars but starts contributing from F2 V with increasing importance towards later spectral types. Comparison of theoretical fluxes with their observed values shows that OH bound-free opacity can account for the missing UV opacity in F stars for wavelengths where the observed flux does not indicate the presence of many lines and alleviates the discrepancy in other parts of the spectral region.
Fox P. W.
Tarafdar Shankar P.
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