An international group of astronomers has made an intriguing discovery after conducting a detailed multi-band observation of the residues of the supernova SNR J0450.4–7050. This object, located in the large Magellanic cloud near the Milky Way, has proven to be much larger than initially expected.
Previously estimated to be about 332 by 244 light years in size, new observations have revealed that the remnants of SNR J0450.4−7050 actually stretch over 489 by 264 light years. In light of this finding, the astronomers have affectionately dubbed the object “Veliki,” which means “big” in Serbian.
The observation was conducted using ASKAP and meerkat telescopes, along with other astronomical instruments, and has uncovered weakly luminous structures extending from Veliki to the north and south, prompting a reevaluation of its dimensions.
Veliki has also proven to be unusual in terms of radio emissions, exhibiting high surface brightness and an extremely low radio spectral index compared to other supernova remnants of similar size. Furthermore, a bright shell emitting hydrogen line H-alpha radiation in the vicinity of the object suggests the presence of prevailing radiation shock waves.
The researchers speculate that Veliki is an aged supernova remnant where radiation processes play a predominant role. The increased compression of shock waves may account for the brighter radio emissions and flatter spectrum observed.
Despite these insights, further observations are necessary to better understand Veliki and its surroundings. Continued research will shed light on the true nature of one of the largest supernova remnants known to date, underscoring the importance of cutting-edge technology and international collaboration in space exploration.