We discussed a paper by T. Murphy, B. M. Gaensler, B. M. and S. Chatterjee, "A 20-yr radio light curve for the young supernova remnant G1.9+0.3", that appeared in the Monthly Notices of the Royal Astronomical Society: Letters, Volume 389, Issue 1, pp. L23-L27. The paper can be downloaded here: ![[WWW]](/modern/img/moin-www.png){kind=small}
http://adsabs.harvard.edu/abs/2008MNRAS.389L..23M
The authors present radio observations the SNR G1.9+0.3 made over the last two decades by the instrument MOST based in Australia. This SNR is of particular interest for us because it was recently identified as the youngest Galactic supernova remnant by a group lead by the colleagues from our department ( http://adsabs.harvard.edu/abs/2008ApJ...680L..41R).
The authors state that, after an advanced statistical analysis ("bootstrap") of the data, the hypothesis that the SNR brightness remained constant or decreased with time can be rejected with 99.95% confidence. Then, with some analytical estimates they argue that a likely explanation of the brightening of the SNR in radio is the amplification of magnetic field responsible for the observed synchrotron radio emission.
We talked about the SNR brighness data presented in the paper, particularly the plot showing a large spread of the recent brightness points, and about the accompanying analysis of the evolution of the SNR and its radio synchrotron emission.
The Power Point slides of Andrey Vladimirov's presentation can be found here: 20yrlightcurve.ppt