Strange Pulse From Star’s ‘Graveyard’ Excites Scientists | The daily thread


A star in deep space from a neutron star “graveyard” emits a strange pulse that intrigues scientists who did not expect to detect any radio emission in this area.

About 1,300 light-years from Earth, in the Vela-X 1 region of the Milky Way, PSR J0941-4046 emitted a pulse that lasted about 300 milliseconds and repeated every 76 seconds. But most neutron star pulses pass every few seconds or less.

“It was unlike anything we had seen before,” University of Sydney professor Manisha Caleb said in the report, the New York Post noted. “We might have found a whole new class of radio-emitting objects,” she added.

“Our observation showed that PSR J0941-4046 had some of the characteristics of a ‘pulsar’ or even a ‘magnetar’,” Caleb wrote in The Conversation. “Pulsars are the extremely dense remnants of giant collapsed stars that typically radiate radio waves from their poles. As they spin, radio pulses can be measured from Earth, much like seeing a beacon flash periodically at far.

The scientists’ summary of the study, published in Nature Astronomy, states:

The population of radio-emitting neutron stars encompasses objects with spin periods ranging from milliseconds to tens of seconds. As they age and spin slower, their radio output should cease. …Our discovery establishes the existence of ultra-long-period neutron stars, suggesting a possible link to the evolution of highly magnetized neutron stars, ultra-long-period magnetars and fast radio bursts.

“It’s also fascinating because it appears to produce at least seven distinct pulse shapes, whereas most neutron stars show no such variety,” Caleb wrote of PSR J0941-4046. “This diversity in pulse shape, as well as pulse intensity, is likely related to the object’s unknown physical emission mechanism.”

“It’s rather lucky that we were able to spot it in the first place,” she admitted, “Detecting similar sources is a challenge, which implies that there may be a larger undetected population waiting. to be discovered. Our discovery also adds to the possibility of a new class of radio transients: the ultra-long-period neutron star.

In the summer of 2018, something powerful from the depths of space sent a series of radio blasts to Earth on July 25, something so powerful the signals were the lowest frequency ever recorded from Fast Radio Bursts (FRB). The reason these signals were so mysterious was that scientists didn’t know what could have sent such powerful explosions, which only last a few milliseconds.

The radio bursts were received by the state-of-the-art Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope at the Dominion Radio Astrophysical Observatory near Penticton, British Columbia, in Canada.

Scientists have speculated that exploding black holes could have sent such bursts, although they also posit that it is possible that they originated from advanced extraterrestrial civilizations.


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