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Calvera (X-ray source)

Topic: Astronomy

 From HandWiki - Reading time: 3 min
Short description: X-ray source star in the constellation Ursa Minor
Calvera
Observation data
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
Distance≤2000[1] pc
Details[1]
Rotation59.199071070 ms
Age285,000 years
Other designations
PSR J1412+7922, RX J1412.9+7922, 1RXS J141256.0+792204[2]
Database references
SIMBADdata

In astronomy, Calvera (also known as 1RXS J141256.0+792204[3]) is an X-ray source in the constellation Ursa Minor, identified in 2007 as an isolated neutron star.[4][5] It is one of the hottest[6] and closest of its kind to Earth.[7]

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, which is possibly its supernova remnant.[8]

References

  1. ↑ 1.0 1.1 1.2 1.3 Bogdanov, Slavko (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. doi:10.3847/1538-4357/ab1b2e. Bibcode: 2019ApJ...877...69B. 
  2. ↑ "RX J1412.9+7922". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=RX+J1412.9%2B7922. 
  3. ↑ In the ROSAT All-Sky Survey Bright Source Catalog (RASS/BSC).
  4. ↑ "Rare dead star found near Earth". August 20, 2007. http://news.bbc.co.uk/2/hi/science/nature/6955769.stm. Retrieved August 21, 2007. 
  5. ↑ 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. doi:10.1086/522667. ISSN 0004-637X. Bibcode: 2008ApJ...672.1137R. 
  6. ↑ 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. doi:10.1088/0004-637X/705/1/391. ISSN 0004-637X. Bibcode: 2009ApJ...705..391S. 
  7. ↑ Rutledge, Robert; Fox, Derek; Shevchuk, Andrew (2008). "Discovery of an Isolated Compact Object at High Galactic Latitude". The Astrophysical Journal 672 (2): 1137–43. doi:10.1086/522667. Bibcode: 2008ApJ...672.1137R. 
  8. ↑ Arias, M.; Botteon, A.; Bassa, C. G.; Van Der Jagt, S.; Van Weeren, R. J.; o'Sullivan, S. P.; Bosschaart, Q.; Dullaart, R. S. et al. (2022). "Possible discovery of Calvera's supernova remnant". Astronomy & Astrophysics 667: A71. doi:10.1051/0004-6361/202244369. Bibcode: 2022A&A...667A..71A. 

External links

  • Universe Today, Closest Neutron Star Discovered
  • Pennsylvania State University. "Possible closest neutron star to Earth found" (Press release). August 20, 2007. Retrieved August 21, 2007.[yes|permanent dead link|dead link}}]




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