Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...317l...9v&link_type=abstract
Astronomy and Astrophysics, v.317, p.L9-L12
Astronomy and Astrophysics
Astrophysics
15
Neutron Star, X-Ray Binaries, Stars: Individual: Gro J1744-28
Scientific paper
The orbital parameters of the recently discovered transient burster/pulsar GRO J1744-28 indicate that this system is a low-mass X-ray binary in an advanced stage of its mass transfer, with several tenths of a solar mass already transferred from the donor to the compact star. All neutron stars known to have accreted such an amount have very weak magnetic fields, and this has led to the idea that the magnetic fields of neutron stars decay as a result of accretion. The observation of a strongly magnetized neutron star in GRO J1744-28 then suggests that this neutron star was formed recently as a result of the collapse of a white dwarf during an earlier stage of the current phase of mass transfer. It is shown that this model can consistently explain the observed characteristics of GRO J1744-28. Attractive progenitors for such an evolution are the luminous supersoft X-ray sources detected with ROSAT.
Finger Mark H.
Fishman Gerald J.
Kouveliotou Chryssa
Lewin Walter H. G.
Paradijs Jan van
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