€ES model suffers from
being Œunconventional¹ but nevertheless:
a)provides the best
interpretation of the data
b)evidently works in
astrophysical systems (Jupiter)
€Predicts the right shape
of X-ray light curve (retrograde spin on primary WD)
€Lifetime of the system
is ~106 years, short but not particularly short – NOTE: the 103 years
quoted by Marsh & Steeghs (2002) is a misinterpretation of the text in Wu et al
(2002)
€It is an expected end
point for double WD pairs if one has a modest (<1MG) field; secondary is not
necessarily in contact with Roche Lobe – expect many of these systems?
€Predicts decreasing
orbital period, as observed for both systems