Astronomy:PSR B1828-11
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Scutum |
| Right ascension | 18h 30m 47.75s |
| Declination | −10° 59′ 10.8″ |
| Distance | 10,000 ly (3,200[1] pc) |
| Spectral type | Pulsar |
| Other designations | |
| Database references | |
| SIMBAD | data |
PSR B1828-11 (also known as PSR B1828-10[2]) 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.[3] The planetary model was later discarded in favour of precession effects as the planets could not cause the observed shape variations of the pulses.[4][5] While the generally accepted model is that the pulsar is a neutron star undergoing free precession,[6] a model has been proposed that interprets the pulsar as a quark star undergoing forced precession due to an orbiting "quark planet".[7] The entry for the pulsar on SIMBAD lists this hypothesis as being controversial.[2]
References
- ↑ Smith, D. A.; Guillemot, L.; Camilo, F.; Cognard, I. et al. (2008). "Pulsar timing for the Fermi gamma-ray space telescope". Astronomy and Astrophysics 492 (3): 923–931. doi:10.1051/0004-6361:200810285. Bibcode: 2008A&A...492..923S.
- ↑ 2.0 2.1 "PSR B1828-10 -- Pulsar". http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=PSR+b1828-10&NbIdent=1&Radius=10&Radius.unit=arcmin&submit=submit+id. Retrieved 2014-07-02.
- ↑ 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.
- ↑ Stairs, I. H.; Lyne, A. G.; Shemar, S. L. (2000). "Evidence for free precession in a pulsar". Nature 406 (6795): 484–486. doi:10.1038/35020010. PMID 10952302. Bibcode: 2000Natur.406..484S.
- ↑ Link, Bennett; Epstein, Richard I.. "Precession Interpretation of the Isolated Pulsar PSR B1828-11". The Astrophysical Journal 556 (1): 392–398. doi:10.1086/321581. Bibcode: 2001ApJ...556..392L.
- ↑ 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. doi:10.1111/j.1365-2966.2005.09745.x. Bibcode: 2006MNRAS.365..653A.
- ↑ Liu (2007). "PSR B1828-11: a precession pulsar torqued by a quark planet?". Monthly Notices of the Royal Astronomical Society: Letters 381 (1): 1–5. doi:10.1111/j.1745-3933.2007.00337.x. Bibcode: 2007MNRAS.381L...1L.
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