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11th of October 2018
The LMC supernova remnant SNR 0509-67.5
(by Roper et al.)
Roper et al. have recently compared two Chandra X-ray images to measure the expansion of a supernova remnant (SNR) in the Large Magellanic Cloud. The images above show (at left) the X-ray image of SNR 0509–67.5 in the 0.5–8.0 keV energy range from data taken in the year 2000, (centre) the X-ray image from 2007, and (right) the difference image between the 2007 epoch and the 2000 epoch X-ray data. The difference results in a nearly complete shell, indicating observable uniform expansion. The colour bar is in units of photons/s/keV/cm^2. SNR 0509–67.5 (J0509-6731) is a young (approximately 400 yr old) Type Ia supernova remnant, and Roper et al. estimate an expansion speed of 7500 +/- 1700 km/s, which is consistent with an optical expansion study on this object. In addition, they examine the medium in which the SNR is expanding by examining the CO and neutral H I gas using radio data obtained from Mopra, the Australia Telescope Compact Array, and Parkes radio telescopes. More details are available from the paper, published in Monthly Notices of the Royal Astronomical Society.

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