The Monoceros nebula is seen in the optical and in radio as a 3°.5 degree diameter ring. It is believed to be an old supernova remnant. Here is reported the detection of X-rays from the Monoceros nebula, confirming its supernova remnant nature.Einstein imaging proportional counter observations of 0.2 to 5 keV X-rays were analyzed to produce a surface brightness map. Preliminary modeling of the Monoceros supernova remnant yields an age of 50 000 years. A large age is expected for such a large remnant. However, the remnant is found to still be in the adiabatic blast wave stage of evolution.
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Leahy, D.A., Naranan, S. & Singh, K.P. X-ray detection of the monoceros supernova remnant. Astrophys Space Sci 119, 249–252 (1986). https://doi.org/10.1007/BF00648859
- Blast Wave
- Surface Brightness
- Proportional Counter
- Supernova Remnant
- Preliminary Modeling