Calvera (X-ray source)

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Calvera
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

  1. 1 2 3 4 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.
  2. 1 2 3 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 .
  3. ↑ "RX J1412.9+7922". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 20 September 2020.
  4. ↑ In the ROSAT All-Sky Survey Bright Source Catalog (RASS/BSC).
  5. ↑ "Rare dead star found near Earth". August 20, 2007. Archived from the original on July 13, 2014. Retrieved August 21, 2007.
  6. ↑ Rutledge, R. E.; Fox, D. B.; Shevchuk, A. H. (2008-01-01). "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.
  7. ↑ Shevchuk, Andrew S. H.; Fox, Derek B.; Rutledge, Robert E. (2009-11-01). "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.
  8. ↑ 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.
  9. ↑ 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.


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