Last modified on July 16, 2020, at 17:40

SN G1.9+0.3

SN G1.9+0.3
G19 xray.tif.jpg
Observational Data
Designation SN G1.9+0.3
NVSS J174846-270950
Right ascension 17h 48m 46.10s[1][2]
Declination -27° 09′ 50.9″[1][2]
Constellation Sagittarius
Type of object Supernova
Dimensions 1.5 arcmin[1][3]
Astrometry
Distance from Earth 27,700 ly[4]

SN G1.9+0.3 (G1.9+0.3, NVSS J174846-270950) is thought to be the most recent supernova to have occurred in the Milky Way about 140 years ago.[5] The supernova itself was not directly observed but its claimed remnant has.[6] It is thought not to have been visible in the optical portion of the electromagnetic spectrum because it occurred close to the centre of the galaxy where high concentrations of gas and dust obscure the view. This is thought to have made it a trillion times fainter that it otherwise would have been.[6] X-ray observations made by the Chandra telescope in 2008, which aren't affected by the gas and dust, have shown the nebula is expanding at 14,000 km/s, by comparing it to radio observations made in 1985.[7]

References

  1. 1.0 1.1 1.2 SNR G1.9+0.3. Simbad Astronomical Database. simbad.u-strasbg.fr. Retrieved on 2019-12-06.
  2. 2.0 2.1 Condon, J. J.; Cotton, W. D.; Greisen, E. W. et al. (1998). "The NRAO VLA Sky Survey". The Astronomical Journal 115 (5): 1693-1716. doi:10.1086/300337. Bibcode1998AJ....115.1693C. 
  3. Green, D. A. (2014). "A catalogue of 294 Galactic supernova remnants". Bulletin of the Astronomical Society of India 42 (2). Bibcode2014BASI...42...47G.  arXiv:1409.0637
  4. Reynolds, S. P.; Borkowski, K. J.; Green, D. A. et al. (2008). "The Youngest Galactic Supernova Remnant: G1.9+0.3". The Astrophysical Journal Letters 680 (1): L41–L44. doi:10.1086/589570. Bibcode2008ApJ...680L..41R.  arXiv:0803.1487
  5. Chandra Reveals New Details About the Remains of Supernova Remnant G1.9+0.3. scitechdaily.com. Retrieved on 2019-12-06.
  6. 6.0 6.1 G1.9+0.3: Discovery of Most Recent Supernova in Our Galaxy. chandra.harvard.edu. Retrieved on 2019-12-06.
  7. Reynolds, S. P.; Borkowski, K. J.; Green, D. A. et al. (2008). "The Youngest Galactic Supernova Remnant: G1.9+0.3". The Astrophysical Journal Letters 640 (1). doi:10.1086/589570. Bibcode2008ApJ...680L..41R.  arXiv:0803.1487