Calvera (X-ray source)
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X-ray source star in the constellation Ursa Minor
For other uses, see Calvera (disambiguation).
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Ursa Minor |
| Right ascension | 14h 12m 55.867s[1] |
| Declination | +79° 22′ 03.895″[1] |
| Characteristics | |
| Evolutionary stage | Neutron star |
| Astrometry | |
| Proper motion (μ) | RA: 78.1[2] mas/yr Dec.: 8.0[2] mas/yr |
| Distance | ≤2000[1] pc |
| Details[1] | |
| Rotation | 59.199071070 ms |
| Age | 285,000 years |
| Other designations | |
| PSR J1412+7922, RX J1412.9+7922, 1RXS J141256.0+792204[3] | |
| Database references | |
| SIMBAD | data |
In astronomy, Calvera (also known as 1RXS J141256.0+792204[4] ) is an X-ray source in the constellation Ursa Minor, identified in 2007 as an isolated neutron star.[5] [6] It is one of the hottest[7] and closest of its kind to Earth.[8]
It is named after the villain in the 1960 film The Magnificent Seven , as it is the eighth such neutron star known within 500 parsecs of Earth, and the seven previously discovered isolated neutron stars are called 'The Magnificent Seven'.
There is a ring of radio emission almost a degree in diameter, offset about 4′.9 from Calvera itself;[9] it is very likely its supernova remnant.[2]
References
[edit ]- ^ a b c d Bogdanov, Slavko; et al. (28 May 2019). "Neutron Star Interior Composition Explorer X-Ray Timing of the Radio and γ-Ray Quiet Pulsars PSR J1412+7922 and PSR J1849-0001". The Astrophysical Journal . 877 (2): 69. arXiv:1902.00144 . Bibcode:2019ApJ...877...69B. doi:10.3847/1538-4357/ab1b2e . S2CID 119337118.
- ^ a b c Rigoselli, M.; Mereghetti, S.; Halpern, J. P.; Gotthelf, E. V.; Bassa, C. G. (2024). "The Proper Motion of the High Galactic Latitude Pulsar Calvera". The Astrophysical Journal. 976 (2): 228. arXiv:2410.21828 . Bibcode:2024ApJ...976..228R. doi:10.3847/1538-4357/ad8cd6 .
- ^ "RX J1412.9+7922". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 20 September 2020.
- ^ In the ROSAT All-Sky Survey Bright Source Catalog (RASS/BSC).
- ^ "Rare dead star found near Earth". August 20, 2007. Archived from the original on July 13, 2014. Retrieved August 21, 2007.
- ^ Rutledge, R. E.; Fox, D. B.; Shevchuk, A. H. (2008年01月01日). "Discovery of an Isolated Compact Object at High Galactic Latitude". The Astrophysical Journal. 672 (2): 1137–1143. arXiv:0705.1011 . Bibcode:2008ApJ...672.1137R. doi:10.1086/522667 . ISSN 0004-637X.
- ^ Shevchuk, Andrew S. H.; Fox, Derek B.; Rutledge, Robert E. (2009年11月01日). "Chandra Observations of 1RXS J141256.0+792204 (Calvera)". The Astrophysical Journal. 705 (1): 391–397. arXiv:0907.4352 . Bibcode:2009ApJ...705..391S. doi:10.1088/0004-637X/705/1/391. ISSN 0004-637X. S2CID 10807335.
- ^ Rutledge, Robert; Fox, Derek; Shevchuk, Andrew (2008). "Discovery of an Isolated Compact Object at High Galactic Latitude". The Astrophysical Journal. 672 (2): 1137–43. arXiv:0705.1011 . Bibcode:2008ApJ...672.1137R. doi:10.1086/522667. S2CID 7915388.
- ^ Arias, M.; Botteon, A.; Bassa, C. G.; Van Der Jagt, S.; Van Weeren, R. J.; o'Sullivan, S. P.; Bosschaart, Q.; Dullaart, R. S.; Hardcastle, M. J.; Hessels, J. W. T.; Shimwell, T.; Slob, M. M.; Sturm, J. A.; Tasse, C.; Theijssen, N. C. M. A.; Vink, J. (2022). "Possible discovery of Calvera's supernova remnant". Astronomy & Astrophysics. 667: A71. arXiv:2207.14141 . Bibcode:2022A&A...667A..71A. doi:10.1051/0004-6361/202244369. S2CID 251135361.
External links
[edit ]- Universe Today, Closest Neutron Star Discovered
- Pennsylvania State University. "Possible closest neutron star to Earth found" (Press release). August 20, 2007. Archived from the original on January 4, 2013. Retrieved August 21, 2007.
