Vela Supernova Remnant

The Vela supernova remnant is a supernova remnant in the southern constellation Vela. Its source Type II supernova exploded approximately 11,000 years ago (and was about 900 light-years away).[1] The association of the Vela supernova remnant with the Vela pulsar, made by astronomers at the University of Sydney in 1968,[2] was direct observational evidence that supernovae form neutron stars.

Vela Supernova Remnant
Diffuse nebula
supernova remnant
The Vela Supernova Remnant.
Observation data: J2000.0 epoch
Right ascension08h 35m 20.66s
Declination−45° 10′ 35.2″
Distance936+62
−55 ly   (287+19
−17[1] pc)
Apparent magnitude (V)12
Apparent dimensions (V)8 degrees (approx.)
ConstellationVela
DesignationsVela XYZ, Gum 16, SNR G263.9-03.3, 1E 0840.0-4430, RE J083854-430902

The Vela supernova remnant includes NGC 2736. The Vela supernova remnant overlaps the Puppis A supernova remnant, which is four times more distant. Both the Puppis and Vela remnants are among the largest and brightest features in the X-ray sky.

The Vela supernova remnant is one of the closest known to us. The Geminga pulsar is closer (and also resulted from a supernova), and in 1998 another near-Earth supernova remnant was discovered, RX J0852.0-4622, which from our point of view appears to be contained in the southeastern part of the Vela remnant. One estimate of its distance puts it only 200 parsecs away (about 650 ly), closer than the Vela remnant, and, surprisingly, it seems to have exploded much more recently, in the last thousand years, because it is still radiating gamma rays from the decay of titanium-44. This remnant was not seen earlier because when viewed in most wavelengths, it is lost in the Vela remnant.[3]

  • Position of Vela in the Milky Way
    Position of Vela in the Milky Way

See also

References
  1. Sushch, I.; Hnatyk, B.; Neronov, A. (2011). "Modeling of the Vela complex including the Vela supernova remnant, the binary system γ2 Velorum, and the Gum nebula". Astronomy and Astrophysics. 525: A154. arXiv:1011.1177. Bibcode:2011A&A...525A.154S. doi:10.1051/0004-6361/201015346. S2CID 55224501.
  2. Large, M. I.; et al. (1968). "A Pulsar Supernova Association?". Nature. 20 (5165): 340. Bibcode:1968Natur.220..340L. doi:10.1038/220340a0. S2CID 32855796.
  3. Iyudin, A. F.; et al. (November 1998). "Emission from 44Ti associated with a previously unknown Galactic supernova". Nature. 396 (6707): 142–144. Bibcode:1998Natur.396..142I. doi:10.1038/24106. S2CID 4430526.
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