2000A&A...363..657E

As presented by Nice et al. (2000, In: Kramer M., Wex N., Wielebinski R. (eds.) Pulsar Astronomy - 2000 and Beyond, ASP Conf. ser., p. 67), long-term timing of the eclipsing binary PSR B1744-24A shows that the orbital period of this system decreases with a time-scale of only ∼200Myr. To explain the much faster orbital period decay than that predicted by only emission of the gravitational waves (∼1000Myr) we propose that the orbital evolution of this system is also driven by magnetic braking. If magnetic braking is to explain the rapid decay of the orbit, then λ characterizing the effectiveness of the dynamo action in the stellar convection zone in the magnetic stellar wind formula must be equal to 1.