SWIFT J1756.9−2508
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| Observation data J2000.0
| ||
|---|---|---|
| Constellation | Sagittarius | |
| Right ascension | 17h 56m 57.200s | |
| Declination | −25° 06′ 26.28″ | |
Distance 8000 pc | | |
| Details | ||
| Mass | 1.8±0.4 M☉ | |
SWIFT J1756.9−2508 is a
planetary-mass core. The pulsar is accreting mass from this companion, resulting in occasional violent outbursts from the accumulated material on the neutron star
.
Planetary system
SWIFT J1756.9-2508's only known planet is notable for its orbital period of less than an hour, about 54 minutes and 43 seconds.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (unconfirmed) | 7.8 (± 1.3) MJ | — | 0.0379907 (± 5e-07) d | — | — | — |
References
- ^ "The Extrasolar Planet Encyclopaedia — SWIFT J1756-2508". Extrasolar Planets Encyclopaedia. Retrieved 2018-08-22.
- H. A. Krimm; C. B. Markwardt; C. J. Deloye; P. Romano; et al. (October 2007). "Discovery of the accretion-powered millisecond pulsar SWIFT J1756.9-2508 with a low-mass companion". Astrophysical Journal Letters. 668 (2): L147–L150. S2CID 120700539.
- H. A. Krimm; C. B. Markwardt; C. J. Deloye; P. Romano; et al. (October 2009). "ERRATUM: Discovery of the accretion-powered millisecond pulsar SWIFT J1756.9-2508 with a low-mass companion". Astrophysical Journal Letters. 703 (2): L183. S2CID 54031388.
External links
- Universe Today, Pulsar Has Almost Completely Devoured a Star
- SIMBAD, "SWIFT J1756.9-2508" (accessed 2010-11-06)
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