Astronomy:PSR J0540−6919

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Short description: Pulsar in the constellation Dorado

Coordinates: Sky map 05h 40m 10.84s, −69° 19′ 54.2″

PSR J0540−6919
250px
PSR B0540-69 and its surrounding supernova remnant imaged by the Chandra X-ray Observatory
Observation data
Equinox J2000.0]] (ICRS)
Constellation Dorado[1]
Right ascension  05h 40m 10.84s[2]
Declination −69° 19′ 54.2″[2]
Apparent magnitude (V) 22.0[3]
Characteristics
Spectral type Pulsar
Astrometry
Distance161,000 ly
(49,400[3] pc)
Details
Rotation50.5697030222 ms[4]
Age1,670[3] years
Other designations
PSR J0540−6919,[2] PSR B0540−69,[2] PKS 0540−693[2]
Database references
SIMBADdata

PSR J0540−6919[2] (PSR B0540−69)[2] is a pulsar in the Tarantula Nebula of the Large Magellanic Cloud.[5] It is the first extragalactic gamma-ray pulsar discovered.[6] A rotation period of 50.569 milliseconds and is characteristic age of 1,670 years old.

History

This Crab-like pulsar was first discovered in X-rays in 1984[7] and subsequently detected at radio wavelengths.[8] Astronomers initially attributed the glow to collisions of subatomic particles accelerated in the shock waves produced by supernova explosions, and it took more than six years of observations by Fermi's Large Area Telescope to detect gamma-ray pulsations from PSR J0540−6919.[9]

In 2015, it was determined that PSR J0540−6919 is responsible for about half of the gamma-ray flux from the Tarantula Nebula in the Large Magellanic Cloud.[9] It was identified as a bright source of gamma radiation early in the Fermi mission.

See also

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R  Constellation record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 "PSR J0540-6919". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=PSR+J0540-6919. 
  3. ↑ 3.0 3.1 3.2 Mignani, Roberto P. (April 2011). "Optical, ultraviolet, and infrared observations of isolated neutron stars". Advances in Space Research 47 (8): 1281–1293. doi:10.1016/j.asr.2009.12.011. Bibcode: 2011AdSpR..47.1281M. 
  4. ↑ Mignani, R. P. et al. (June 2010). "HST/WFPC2 observations of the LMC pulsar PSR B0540-69". Astronomy and Astrophysics 515: A110. doi:10.1051/0004-6361/200913870. Bibcode: 2010A&A...515A.110M. 
  5. ↑ Crawford, Fronefield et al. (May 20, 2001). "Radio Pulsars in the Magellanic Clouds". The Astrophysical Journal 553 (1): 367–374. doi:10.1086/320635. Bibcode: 2001ApJ...553..367C. 
  6. ↑ NASA/Goddard Space Flight Center (13 November 2015). "First gamma-ray pulsar detected in another galaxy". ScienceDaily. https://www.sciencedaily.com/releases/2015/11/151113105709.htm. 
  7. ↑ Seward, F. D.; Harnden, F. R. Jr.; Helfand, D. J. (January 20, 1984). "Discovery of a 50 millisecond pulsar in the Large Magellanic Cloud". The Astrophysical Journal Letters 287: L19–L22. doi:10.1086/184388. Bibcode: 1984ApJ...287L..19S. 
  8. ↑ Manchester, R. N. et al. (January 20, 1993). "Radio detection of PSR B0540−69". The Astrophysical Journal Letters 403: L29–L32. doi:10.1086/186714. Bibcode: 1993ApJ...403L..29M. 
  9. ↑ 9.0 9.1 "Fermi Satellite Detects First Gamma-Ray Pulsar in Another Galaxy". NASA (SpaceRef). 12 November 2015. http://spaceref.com/astronomy/fermi-satellite-detects-first-gamma-ray-pulsar-in-another-galaxy.html. 



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