Temperature, radius, and rotational velocity of Sirius B

The interrelationships between radius, rotational velocity, and effective temperature for Sirius B are derived. The radius, which is between 0.76 and 0.81 in hundredths of solar radii, places Sirius B somewhat above the Hamada-Salpeter mass-radius relation by about one or two sigma. The rotational velocity of Sirius B is predicted to be between 0 and 600 km/s. Only radii which place a white dwarf above the mass-radius line are allowed. Better determinations of T(eff) and magnitude are needed in order to further limit the rotational velocity and the radius of Sirius B.