A VLA Archive Observation of the Youngest Known Galactic Supernova Remnant G1.9+0.3
classification
🌌 astro-ph.GA
astro-ph.HE
keywords
observationremnantarchivegalacticknownsupernovayoungestagrees
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We present the analysis of an unpublished VLA archive observation made at 1.49 GHz in 1989 toward the supernova remnant G1.9+0.3, the youngest such Galactic object known. This observation agrees with the time evolution in angular size previously reported. We derive an expansion rate of 0.46 +- 0.11 % per year and an age of 220+45-70 yr for the remnant by comparing the 1985 and 1989 images.
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