Abstract

A time resolved spectroscopic study of the SU UMa subtype dwarf nova AK Cancri is presented. An orbital period of P orb = 0 d.0651(2) and a radial velocity half-amplitude of K = 50(3) km s -1 were obtained from the radial velocity variations of the H? emission line. Assuming various observational constraints, we deduced a most likely mass ratio of q = 0.28 ± 0.02 and stellar masses of M(1) = 0.41 ± 0.03M ? and M(2) = 0.1135 ± 0.0002M ?, for the primary and secondary star, respectively. In addition, the dynamical solution indicates a low orbital inclination (i = 36° ± 3°).