INTRINSIC COLOR INDEXES OF OB SUPERGIANTS, GIANTS AND DWARFS IN THE UBVRIJHKLM SYSTEM

This paper is based on UBVRIJHKLM magnitudes of about 700 O- and B-type stars obtained from the literature. The mean intrinsic colours have been derived with the aid of two-colour diagrams for O- and B-type stars of luminosity classes Ia, Iab-Ib-II, m and IV-V. The present results are based on much larger samples of every Spit than any other previously determined infrared colours. The colours obtained are compared with those obtained by other authors. In the present system of infrared colours, the intrinsic (B - V)(0) values obtained in the programme to determine the intrinsic ultraviolet colours of OB stars (Papaj, Krekowski & Wegner) were used. The majority of slightly reddened Oe and Be stars and all very strongly reddened Be stars adopted in this work are placed on the two-colour diagrams identically as normal B stars. Examples of several mio-colour diagrams are presented.