Using a technique to block certain wavelengths of light, researchers hope to discover many more hidden pulsars.
Credit: PennockAstronomers have confirmed that an object they thought was a distant galaxy is actually the brightest extra-galactic pulsar ever seen. The team made the discovery using a technique that blocks a particular type of polarized light, similar to polarized sunglasses, which could be used to spy more ‘hidden’ pulsars.
Wang and the team say the pulsar is ten times brighter than any other pulsar found outside the Milky Way. Their study is published in“Because of its unusual properties, this pulsar was missed by previous studies, despite how bright it is,” said co-author, Tara Murphy, a radio astronomer at the University of Sydney in Australia, in a press release.Pulsars are typically identified from their faint pulse, flickering periodically.
Emissions from pulsars are often highly polarized, and some of them oscillate in a circular way. Few space objects are polarized like this, which makes them stand out. “We should expect to find more pulsars using this technique. This is the first time we have been able to search for a pulsar’s polarization in a systematic and routine way,” said Murphy.
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