Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983azh....60.1155v&link_type=abstract
(Astronomicheskii Zhurnal, vol. 60, Nov.-Dec. 1983, p. 1155-1161) Soviet Astronomy (ISSN 0038-5301), vol. 27, Nov.-Dec. 1983, p.
Astronomy and Astrophysics
Astronomy
4
Binary Stars, Novae, Stellar Spectra, Balmer Series, Brightness, Calcium, Emission Spectra, H Lines, Helium, Radial Velocity, X Ray Sources
Scientific paper
Spectroscopic observations of TT Ari obtained at normal brightness in December, 1979, and at 4-mag reduced brightness in October, 1980, with an SP-160 spectrograph (dispersion 60 A/mm, resolution 3.5 A) at the prime focus of 6-m telescope of the Special Astrophysical Observatory are reported. The results are presented graphically and discussed. The spectra at full brightness are in agreement with those of Cowley et al. (1975), while those at reduced brightness show order-of-magnitude increases in the equivalent widths of the H, He I, He II, C III, and N III emission lines and changes in the radial-velocity curves. The spectral changes are attributed to a softening of the primary-component X-ray spectrum and a decrease in X-ray flux, which is absorbed by outflowing mass to produce the emission lines.
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