On the origin of quiescent X-ray emission from A0535+26

The quiescent X-ray emission from A0535+26 (L-x similar to 2 10(35) ergs(-1)) is explored in terms of the spherically symmetrical accretion onto a magnetized neutron star. I find the magnetospheric boundary of the neutron star in A0535+26 to be stable with respect to interchange instabilities. The fastest mode by which the accreting plasma can enter the magnetosphere is the magnetic lines reconnection. Under this condition the quiescent X-ray luminosity of the system can be explained provided the mass capture rate by the neutron star from the wind of the Be companion of similar to 10(-9) m(circle dot) yr(-1). I show this value to be in a good agreement with the mass capture rate independently evaluated from the established parameters of the Be star circumstellar environment. The suggested approach allows to interpret the low luminous state of the system (L-x similar to 4 10(33) erg s(-1)) in August - November 1998 in terms of the accretion powered pulsar model. I find the mass capture rate by the neutron star during this time of 3 10(-11) M-circle dot yr(-1). This can be realized provided the plasma density in the circumstellar disk of the Be companion is by two orders of magnitude smaller than its average value. Under this condition the disk is expected to be invisible in the optical/IR.