New evidence of strong UV radiation in TT Ari

Details New evidence of strong UV radiation in TT Ari New evidence of strong UV radiation in TT Ari

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...110..281w&link_type=abstract

Astronomy and Astrophysics, vol. 110, no. 2, June 1982, p. 281-286.

Astronomy and Astrophysics

Astronomy

12

Binary Stars, Spectral Energy Distribution, Stellar Spectra, Stellar Spectrophotometry, Ultraviolet Astronomy, Iue, Line Spectra, Optical Thickness, Stellar Luminosity, Stellar Mass Accretion, Ultraviolet Radiation

Scientific paper

Three SWP spectra and one LWR spectrum of the cataclysmic variable TT Ari were obtained with the IUE satellite during three different brightness phases, including the brightness minimum of November 1980. The absolute continuum intensity distribution in the UV and optical regions is examined in relation to several steady-state optically thick accretion disk models. It is shown that the flux distribution cannot be represented by any of these models. The strong excess is in good agreement with an Fnu proportional to nu-squared power law, which is interpreted as the Rayleigh-Jeans tail of a soft X-ray thermal blackbody component with k(Tbb) 17 eV and maximum flux at 0.1-0.2 keV.

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