Four Southern A-Type Supergiants

Details Four Southern A-Type Supergiants Four Southern A-Type Supergiants

Aug 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973ap%26ss..23..431b&link_type=abstract

Astrophysics and Space Science, Volume 23, Issue 2, pp.431-441

Astronomy and Astrophysics

Astrophysics

6

Scientific paper

Measures of line intensities from high-dispersion spectrograms of HD 92207, 100262, 125835 and 161912 are presented. Analysis with a theoretical curve of growth leads to the selection of parameters for excitation temperature and microturbulence. The turbulent velocity in the atmosphere of HD 92207 varies through a factor of two in approximately one month, in phase with a similar change in the equivalent width of Hγ. The spectra of the other three stars do not appear to vary, but the turbulent velocity is much less for Fe i than for Fe ii and Cr ii.

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