Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26as...65..199a&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 65, no. 1, July 1986, p. 199-206.
Astronomy and Astrophysics
Astrophysics
2
Eclipsing Binary Stars, Hot Stars, Stellar Spectrophotometry, Ultraviolet Spectra, Data Reduction, Iue, Light Scattering, Radiant Flux Density, Stellar Envelopes, Wavelengths
Scientific paper
Recent infrared photometry indicates that the alleged disk of particulate matter surrounding the mysterious secondary object in the Epsilon Aur system is cold, around 500 K. IUE spectra, on the other hand, contain significant flux in excess of that expected from an F0 Ia star in the far UV, which if interpreted as a hot secondary star leads to a possible contradiction with the IR data. Other models of the UV excess have been proposed, including the idea that the bulk of the short-wavelength flux is light scattered into the SWP camera from longer wavelengths. With the recent availability of a detailed generalized IUE descattering algorithm it is possible to thoroughly investigate the scattered-light contribution to the short-wavelength continuum. It is found that the IUE spectra are indeed partially contaminated by scattered light, but that even after correction for this instrumental effect a significant time-dependent UV excess is still present.
Altner Bruce
Chapman Robert Dewitt
Kondo Yoshihiko
Stencel Robert E.
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