RX J0822−4300
 motion of the neutron star RX J0822−4300 from the Puppis A supernova event. | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Puppis[1] |
| Right ascension | 08h 22m 26.84s[2] |
| Declination | −43° 10′ 26.2″[2] |
| Astrometry | |
| Distance | 2,000[citation needed] pc |
| Galactic coordinates | 260.3841 −03.4718 |
| Other designations | |
| PSR J0822−4300, 1RXS J082158.2−430022 | |
| Database references | |
| SIMBAD | data |
RX J0822−4300, often referred to as a "Cosmic Cannonball", is a radio-quiet neutron star currently moving away from the center of the Puppis A supernova remnant at 672±115 km/s, making it one of the fastest moving stars ever found.[3] Earlier, it was believed to move with speed as high as 1,500 km/s. Astronomers used NASA's Chandra X-ray Observatory to observe the star over a period of 11 years to determine its speed.[3]
Although the cosmic cannonball is not the only hypervelocity star discovered, it is unique in the apparent origin of its speed. Others may have derived theirs from a gravitational slingshot around the Milky Way's suspected supermassive black hole, Sagittarius A*. Current theories fail to explain how such speeds can be attained from a supernova explosion. It could be a possible quark star.
See also
[edit]- Puppis A or SNR 260.4−3.4
External links
[edit]
Media related to RX J0822-4300 at Wikimedia Commons
- "Cosmic Canonball: One Of The Fastest Stars Ever Seen Challenges Astronomy Theories", ScienceDaily, (2007)
- "Chandra Discovers a Cosmic Cannonball", Science@NASA (28 October 2007)
- Chandra X-Ray Observatory, "RX J0822-4300 in Puppis A: Chandra Discovers Cosmic Cannonball", 28 November 2007
- "RX J0822−4300". SIMBAD. Centre de données astronomiques de Strasbourg.
References
[edit]- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b Petrov, Leonid; De Witt, Alet; Sadler, Elaine M.; Phillips, Chris; Horiuchi, Shinji (2019). "The Second LBA Calibrator Survey of southern compact extragalactic radio sources - LCS2". Monthly Notices of the Royal Astronomical Society. 485 (1): 88. arXiv:1812.02916. Bibcode:2019MNRAS.485...88P. doi:10.1093/mnras/stz242.
- ^ a b Becker, Werner; Prinz, Tobias; Frank Winkler, P.; Petre, Robert (2012). "The Proper Motion of the Central Compact Object Rx J0822–4300 in the Supernova Remnant Puppis A". The Astrophysical Journal. 755 (2): 141. arXiv:1204.3510. doi:10.1088/0004-637X/755/2/141. S2CID 250810663.
