 motion of the neutron star RX J0822−4300 from the Puppis A supernova event. | |
| Observation data Epoch 1952 (equinox J2000.0) Equinox 1952 (equinox J2000.0) | |
|---|---|
| Constellation | Puppis |
| Right ascension | 08 23 8.16 |
| Declination | −42° 41′ 41.4″ |
| Apparent magnitude (V) | ~24 |
| Astrometry | |
| Radial velocity (Rv) | 672 km/s |
| Distance | 2,000 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. 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.
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
- Puppis A or SNR 260.4−3.4
References
- Hui, C. Y.; Becker, W. (2006). "Probing the proper motion of the central compact object in Puppis-A with the Chandra high resolution camera". Astronomy and Astrophysics. 457 (3): L33. arXiv:astro-ph/0606750. Bibcode:2006A&A...457L..33H. doi:10.1051/0004-6361:20065941. S2CID 14468740.
- ^ Hui, C. Y.; Becker, W. (2006). "X-ray observations of RX J0822−4300 and Puppis-A" (PDF). Astronomy and Astrophysics. 454 (2): 543. arXiv:astro-ph/0508655. Bibcode:2006A&A...454..543H. doi:10.1051/0004-6361:20053554. S2CID 14739530.
- ^ 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.
- "Cosmic Canonball: One Of The Fastest Stars Ever Seen Challenges Astronomy Theories", ScienceDaily, (2007)
- "Chandra Discovers a Cosmic Cannonball", Science@NASA (10.28.2007)
- Chandra X-Ray Observatory, "RX J0822-4300 in Puppis A: Chandra Discovers Cosmic Cannonball", 2007 November 28
- https://web.archive.org/web/20071205023347/http://www.unesp.br/universofisico/semanario.php?date=2006-08-14
- "RX J0822−4300". SIMBAD. Centre de données astronomiques de Strasbourg.
