An ATCA Observation of the Youngest Known Galactic SNR G1.9+0.3

Details An ATCA Observation of the Youngest Known Galactic SNR G1.9+0.3 An ATCA Observation of the Youngest Known Galactic SNR G1.9+0.3

2008-06-23

arxiv.org/abs/0806.3605v1

Astronomy and Astrophysics

Astrophysics

3 pages, 2 figures, submitted to MNRAS

Scientific paper

We present an analysis of a previously unpublished radio-continuum observation of SNR G1.9+0.3 which at an age of <=150 years is the youngest known in the Galaxy. The observations were made in 1993 using the Australia Telescope Compact Array (ATCA) at two 6-cm frequencies. We note two previously unseen blow-out structures in the north and south direcions. We estimate a flux density of 1.545Jy, an outer diameter of ~80" and confirm an expansion rate of ~0.65% per year between 1985 and 2008. No polarisation was detected in the radio emission from SNR G1.9+0.3 above the 1% level. We also present these previously unpublished results as a high resolution reference point from which to study the evolution of SNRs at times for which there is a gap in our knowledge.

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