PSR B1828−11 - Star - astro.wikisort.org

astro.wikisort.org - Star

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]

PSR B1828-11
Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Scutum
Right ascension	18^h 30^m 47.75^s
Declination	−10° 59′ 10.8″
Distance	10,000 ly (3,200[1] pc)
Spectral type	Pulsar
Other designations
PSR J1830-1059, PSR B1828-10
Database references
SIMBAD	data

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. arXiv:0810.1637. Bibcode:2008A&A...492..923S. doi:10.1051/0004-6361:200810285.
"PSR B1828-10 -- Pulsar". SIMBAD. 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. Bibcode:2000Natur.406..484S. doi:10.1038/35020010. PMID 10952302.
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.
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.
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.

Constellation of Scutum

List of stars in Scutum
Scutum in Chinese astronomy

Stars

Bayer	α β γ δ ε ζ η
Variable	R S X RS RU RY RZ SS TY UY BX CM EU EV EW FR V367 V368 V373 V430 V432 V443 V447 V450 V452 V455 V475 V476 V479 V496
HR	6878 6881 6892 6940 6946 6956 6962 6963 6970 6989 7007 7014 7024 7034 7055 7083 7094 7110 7119
HD	169913 174005 174328
Other	BD-11 4672 COROT-17 CRL 2136 1E 1841-045 IRC -10414 2MASS J18450079–1409036 MWC 300 OH 17.7-2.0 OH 26.5+0.6 PSR B1822−09 PSR B1823−13 PSR B1828−11 PSR B1829−10 PSR J1841−0500 PSR J1833−1034 4U 1850-087 WR 114 WR 119 WR 120 WR 121-16 Stephenson 2-18 RSGC1-F01 RSGC1-F02 IRAS 18357-0604

Star
clusters

NGC	6712
Other	Alicante 7 Alicante 8 Alicante 10 Mercer 3 Messier 26 RSGC1 RSGC3 Stephenson 2 Wild Duck Cluster

Nebulae	IC 1295