Bibcode
Breton, R. P.; Robert, M. S. E.; Ransom, S. M.; Kaspi, V. M.; Durant, M.; Bergeron, P.; Faulkner, A. J.
Referencia bibliográfica
40 YEARS OF PULSARS: Millisecond Pulsars, Magnetars and More. AIP Conference Proceedings, Volume 983, pp. 479-481 (2008).
Fecha de publicación:
2
2008
Número de citas
0
Número de citas referidas
0
Descripción
Standard binary evolution models of pulsars in very circular orbits can
explain systems with lighter companions and weaker magnetic fields: they
are descended from long-lived Low Mass X-ray Binaries with Roche-lobe
overflow. By contrast, those having more massive companions and larger
magnetic fields are descendants of Intermediate Mass systems, that
experienced a common envelope phase.
PSR J1744-3922 is a Galactic field binary pulsar exhibiting an unusual
combination of characteristics compared to other binary pulsars with
low-mass members in circular orbits: it has a relatively long spin
period (172 ms), a relatively high magnetic field
(1.7×1010 G), a short orbital period (4.6 h) and a
light companion (Mmin = 0.08Msolar). These
properties are not self-consistently explained by standard evolution
models and so suggest that PSR J1744-3922 has a peculiar evolutionary
history. We identify some other previously catalogued Galactic field
binary pulsars with similar properties and propose they are potential
members of a new class of binary pulsars. Such pulsars could possibly be
formed by the recycling of a pulsar originally having a
magnetar-strength magnetic field, accretion-induced collapse of a
massive white dwarf or a special case of common envelope accretion from
a low-mass star.