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 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 was thought that three extrasolar planets orbit the star, but these have not been confirmed and are now considered doubtful. If confirmed, they may be considered the first "quark star planets" ever to be discovered.
Planetary system
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| 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.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (unconfirmed) | ≥0.0019 M⊕ | ? | ? | ? | — | — |
References
- ↑ 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.
External links
- http://exoplanet.eu/star.php?st=PSR+B1828-11
- Liu et al.. "PSR B1828-11: a precession pulsar torqued by a quark planet". Centre de Données astronomiques de Strasbourg (CDS). Retrieved 2008-07-03.
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