Behavior of the energy distribution of 59 CYG in the far ultraviolet and in the visible

Details Behavior of the energy distribution of 59 CYG in the far ultraviolet and in the visible Behavior of the energy distribution of 59 CYG in the far ultraviolet and in the visible

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176..291d&link_type=abstract

In ESA 3rd European IUE Conf. p 291-293 (SEE N83-11889 02-88)

Physics

4

B Stars, Cygnus Constellation, Interstellar Extinction, Spectral Energy Distribution, Stellar Luminosity, Far Ultraviolet Radiation, Shell Stars, Stellar Envelopes, Stellar Spectra, Visible Spectrum

Scientific paper

Interstellar reddening of 59 Cyg, its luminosity, and the appearance and disappearance of the circumstellar spectrum in Be stars are discussed. An interstellar reddening value E(B-V) = 0.067, smaller than the older determinations, is reported. The interstellar 2200 A feature is not contaminated by the circumstellar spectrum. The total luminosity of 59 Cyg was determined at two different phases, with emission and nearly without emission. No difference between the two luminosities was detected and they are equal to the luminosity of a normal B star having the same lambda1 D parameters as 59 Cyg. It is suggested that Be/Shell star envelopes are more or less permanent and that the appearance and disappearance of the circumstellar spectrum is due to small perturbations.

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