PSR B1828-11

PSR B1828-11
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scutum
Right ascension 18h 30m 47.75s
Declination −10° 59′ 10.8″
Other designations
Database references
SIMBADdata

PSR B1828-11 (also known as PSR B1828-10[1]) is a pulsar approximately 10,000 light-years away in the constellation of Scutum. The star exhibits variations in the timing and shape of its pulses: this was at one stage interpreted as due to a possible planetary system in orbit around the pulsar, though the model required an anomalously large second period derivative of the pulse times.[2] The planetary model was later discarded in favour of precession effects as the planets could not cause the observed shape variations of the pulses.[3][4] While the generally accepted model is that the pulsar is a neutron star undergoing free precession,[5] a model has been proposed that interprets the pulsar as a quark star undergoing forced precession due to an orbiting "quark planet".[6] The entry for the pulsar on SIMBAD lists this hypothesis as being controversial.[1]

References

  1. ↑ 1.0 1.1 "PSR B1828-10 -- Pulsar". SIMBAD. Retrieved 2014-07-02.
  2. ↑ Bailes, M.; Lyne, A. G.; Shemar, S. L. (1993). "Limits on pulsar planetary systems from the Jodrell Bank timing database". Planets around pulsars; Proceedings of the Conference. California Inst. of Technology, Pasadena. pp. 19–30. Bibcode:1993ASPC...36...19B.
  3. ↑ Stairs, I. H.; Lyne, A. G.; Shemar, S. L. (2000). "Evidence for free precession in a pulsar". Nature 406 (6795): 484–486. Bibcode:2000Natur.406..484S. doi:10.1038/35020010.
  4. ↑ Link, Bennett; Epstein, Richard I. "Precession Interpretation of the Isolated Pulsar PSR B1828-11". The Astrophysical Journal 556 (1): 392–398. arXiv:astro-ph/0101434. Bibcode:2001ApJ...556..392L. doi:10.1086/321581.
  5. ↑ Akgün, Taner; Link, Bennett; Wasserman, Ira (2006). "Precession of the isolated neutron star PSR B1828-11". Monthly Notices of the Royal Astronomical Society 365 (2): 653–672. arXiv:astro-ph/0506606. Bibcode:2006MNRAS.365..653A. doi:10.1111/j.1365-2966.2005.09745.x.
  6. ↑ Liu et al. (2007). "PSR B1828-11: a precession pulsar torqued by a quark planet?". Monthly Notices of the Royal Astronomical Society: Letters 381 (1): 1–5. arXiv:astro-ph/0411133. Bibcode:2007MNRAS.381L...1L. doi:10.1111/j.1745-3933.2007.00337.x.