PSR B1828-10

PSR B1828-10
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scutum
Right ascension 18h 30m 47.75s
Declination -10° 59′ 10.8″
Distance 11,812 ly
(3,619.09 pc)
Spectral type Pulsar
Other designations
Database references
SIMBAD data

PSR B1828-10 is a pulsar approximately 11,812 light-years away in the constellation of Scutum. It is speculated that this pulsar may in fact be a quark star. As of 1992, it is thought that three extrasolar planets orbit the star, but have not been confirmed and are now considered doubtful. If confirmed, they may be considered the first "quark star planets" ever to be discovered.

Possible planetary system

As of 1992, it is thought that three extrasolar planets orbit the star, but have not been confirmed and are now considered doubtful.

The PSR B1828-10 system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity
A (unconfirmed) 3 M⊕ 0.93 384.3649 0
B (unconfirmed) 12 M⊕ 1.32 493.077375  ?
C (unconfirmed) 8 M⊕  ?  ?  ?

Liu et al. (2007) have proposed an alternative model, showing a very low-mass planetary object at unclear orbital separation from the neutron star[1]. A putative radius of 0.0157 Earth radii is also inferred. If confirmed it would show a mass range within dwarf planet regime, though its composition could turn out totally different from a normal planet, since such object could be a quark planet.

The PSR B1828-10 system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity
b (unconfirmed) ≥0.0019 M⊕  ?  ?  ?

References

  1. ^ 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:10.1086/180471. 

External links