The Youngest Galactic Supernova Remnant: G1.9+0.3

@article{Reynolds2008TheYG,
  title={The Youngest Galactic Supernova Remnant: G1.9+0.3},
  author={Stephen P. Reynolds and Kazimierz J. Borkowski and David A. Green and Una Hwang and Ilana Muriel Harrus and Robert Petre},
  journal={The Astrophysical Journal Letters},
  year={2008},
  volume={680},
  pages={L41 - L44}
}
Our 50 ks Chandra observation of the small radio supernova remnant (SNR) G1.9+0.3 shows a complete shell structure with strong bilateral symmetry, about 100″ in diameter. The radio morphology is also shell-like, but only about 84″ in diameter, based on observations made in 1985. We attribute the size difference to expansion between 1985 and our Chandra observations of 2007. Expansion is confirmed in comparing radio images from 1985 and 2008. We deduce that G1.9+0.3 is of order 100 years old—the… 

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