Nelemans et al. (2000) find
,
because the equation they use for the Roche lobe is
different from the Eq. (5) that we use. They also
use a different condition for the stability of mass transfer from an evolving star.
Our calculations show that if we would use Eq. (7) instead, the upper limit
to
would drop, so that we can be confident that the limit we find is
indeed an upper limit.