The ratio of H and K CA II line intensities in the spectra of T Tauri type stars

Details The ratio of H and K CA II line intensities in the spectra of T Tauri type stars The ratio of H and K CA II line intensities in the spectra of T Tauri type stars

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992kfnt....8...42m&link_type=abstract

Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 8, Jan.-Feb. 1992, p. 42-46, 54. In Russian.

Physics

Chromosphere, Emission Spectra, H Lines, K Lines, Stellar Spectra, T Tauri Stars, Calcium, Stellar Atmospheres

Scientific paper

The attenuation of radiation in the H Ca II line relative to the K Ca II line in T Tauri type stars with a developed emission spectrum is investigated. It is shown that this attenuation is due to the absorption of H Ca II radiation by the H-epsilon line in the shell or by the Fe I 396.9 nm line in the 'inverse' chromosphere, with subsequent fluorescence in the Fe I 406.3 and 413.2 nm lines. The case of excitation of the Ca II and Fe I lines in the same gas volume appears to be inadequate.

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