RX J0852.0−4622

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RX J0852.0−4622 or Vela Junior
Supernova Remnant G266.2-1.2.jpg
Event typeSupernova remnant Edit this on Wikidata
SN
Date1998
ConstellationVela
Right ascension08h 52m
Declination−46° 22′
EpochJ2000.0
Galactic coordinates286.9460 +42.4568 (34" W, 10" S)
Distance700 ly
RemnantCXOU J085201.4-461753
Notable featuresCould be associated with PSR J0855−4644.
central object in SNR RX J0852.0−4622 = AX J0851.9−4617.
Other designationsSNR G266.2-01.2, SNR G266.3-01.2, 3FHL J0851.9-4620e, RX J0852.0-4622, 2FGL J0851.7-4635, 3FGL J0852.7-4631e, 2FHL J0852.8-4631, 2FHL J0852.8-4631e
[edit on Wikidata]

RX J0852.0−4622 (also known as G266.2−1.2) is a supernova remnant. The remnant is located in the southern sky in the constellation Vela ("sail"), and sits (in projection) inside the much larger and older Vela Supernova Remnant. For this reason, RX J0852.0−4622 is often referred to as Vela Junior (Vela Jr.).[1][2][3]

It was found in 1998[4] when gamma ray emissions from the decay of 44Ti nuclei were discovered using the Imaging Compton Telescope (COMPTEL).

The distance to this object is controversial, but some scientists argue that the supernova remnant is only 650–700 light-years away,[4][5] and exploded comparatively recently (as seen from Earth), perhaps within the last 800 years. If the remnant is indeed young and nearby, its corresponding supernova should have been visible from the Earth in about the year 1320.[6] One difficulty with this interpretation is that there are no contemporary written reports of any supernova at that time or in that part of the sky, which may be due to the fact that most observers at the time were from the Northern hemisphere.

The central compact object (CCO) was discovered in 2001.[7] In the initial Chandra X-ray image and deeper images thereafter, no pulsations were detected from the compact remnant, which is believed to be the neutron star CXOU J085201.4-461753.

References[]

  1. ^ SNRcat: Supernova Remnant G266.2-01.2
  2. ^ Michelle Starr: The Rings of Ancient Trees May Hold Tales of Epic Space Explosions, on: sciencealert, 14 November 2020
  3. ^ G. E. Allen, K. Chow, T. DeLaney, M. D. Filipović, J. C. Houck, T. G. Pannuti, M. D. Stage: ON THE EXPANSION RATE, AGE, AND DISTANCE OF THE SUPERNOVA REMNANT G266.2–1.2 (Vela Jr.). In: The Astrophysical Journal, Volume 798, Number 2. Published 2014 December 29. The American Astronomical Society.
  4. ^ a b Iyudin, A. F.; Schönfelder, V.; Bennett, K.; Bloemen, H.; Diehl, R.; Hermsen, W.; Lichti, G. G.; Van Der Meulen, R. D.; Ryan, J.; Winkler, C. (1998). "Emission from 44Ti associated with a previously unknown Galactic supernova". Nature. 396 (6707): 142–144. Bibcode:1998Natur.396..142I. doi:10.1038/24106.
  5. ^ Aschenbach, B. (1998). "Discovery of a young nearby supernova remnant" (PDF). Nature. 396 (6707): 141–142. Bibcode:1998Natur.396..141A. doi:10.1038/24103.
  6. ^ "Footprints of the newly discovered Vela supernova in Antarctic Ice Cores". 14 February 2019. Retrieved 27 September 2020. Cite journal requires |journal= (help)
  7. ^ Pavlov, G. G.; Sanwal, D.; Kiziltan, B.; Gairmire, G. P. (2001). "The Compact Central Object in the RX J0852.0−4622 Supernova Remnant". The Astrophysical Journal. 559 (2): L131. arXiv:astro-ph/0108150. Bibcode:2001ApJ...559L.131P. doi:10.1086/323975.

External links[]

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