1996A&A...313..517V

From Stroemgren uvby photometry, obtained during the last 14 years, we demonstrate that HR 6000 shows long-term photometric variations with a small (about 0.03mag in u, 0.02mag in v and 0.01mag in b) amplitude. Whereas previous authors classified HR 6000 spectroscopically as A0/3 IIIp and photometrically as B7, we conclude that the observed properties of this system may be explained by inferring that HR 6000 is in fact a binary system, consisting of a B6 V star and a T Tauri companion. The combined spectrum of these two components may easily have been mistaken for a chemically peculiar early A-type star. This scenario also explains the observed small amount of infrared excess and the observed ROSAT X-ray flux of this system as arising from a T Tauri companion. Other traces of this companion have not been detected in our studies. Detection of the T Tauri companion with near-IR spectroscopy may be possible due to the significant contribution of the companion to the total flux at these wavelengths.