A. Stawikowski et R. Glebocki, ARE THE ROTATIONAL AXES PERPENDICULAR TO THE ORBITAL PLANES IN THE BINARY-SYSTEMS .1. ASYNCHRONOUS LONG-PERIOD RS CVN STARS, Acta Astronomica, 44(1), 1994, pp. 33-44
We show that only 12 out of 27 analyzed binaries have data good enough
for reliable determination of i(orb) and i(rot). In 4 systems (out of
these 12) assumption about coplanarity of rotational equatorial plane
and orbital plane is justified. In the remaining cases rotational axe
s are not perpendicular to the orbital planes (non-coplanar case). The
commonly accepted assumption about the coplanarity of rotational and
orbital planes should be revised.