A model for the recurrent flares in EXO 2030 + 375

Details A model for the recurrent flares in EXO 2030 + 375 A model for the recurrent flares in EXO 2030 + 375

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...331l.117t&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 331, Aug. 15, 1988, p. L117-L120.

Astronomy and Astrophysics

Astrophysics

30

Pulsars, Stellar Flares, Stellar Models, X Ray Binaries, B Stars, Neutron Stars, Periodic Variations, Stellar Mass Ejection

Scientific paper

The authors show that nonsteady hydrodynamical flows associated with mass and angular momentum capture by a neutron star during a mass ejection phase from a Be star can produce flares with remarkable resemblance to those observed during an outburst from the X-ray transient pulsar EXO 2030+375. To reproduce the recurrent time scale of the flares, the velocity of the outflowing matter is estimated to be about 550 km s-1. Since the theoretical model requires that a transient disk circulating in one direction is followed by a transient disk circulating in the opposite direction, the time derivative of the pulse period is expected to change sign after each flare event.

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