Astronomers Get Mysterious Radio Signals from the Milky Way
Illustration of a radio signal from the Milky Way
Netgenz - Sains | Astronomers who study the main regions of the galaxy say they have discovered a mysterious new radio signal from the Milky Way. The discovery of the mystery wave was featured in The Astrophysical Journal on October 12. The cosmic wave, which some new astronomers see as being said to be the most polarized, steepest spectrum located four degrees from the galactic center in the Milky Way.
The Astrophysical Journal said the source was identified 6 times between January 2020 and September 2020 as part of the Australian Square Km Array Pathfinder Variables and Slow Transients (ASKAP VAST) survey at 888 MHz. It exhibits a high level (∼25%) of circular polarization when visible.
"We monitored the source with the MeerKAT telescope from November 2020 to February 2021 with a cadence of 2-4 weeks. The source was not identified with MeerKAT prior to February 7, 2021, when it was present and achieved a peak flux density of 5.6 mJy," say researchers from the University of Sydney. , which is published in a new study in The Astrophysical Journal.
"The source is still circularly polarized, but also exhibits a linear polarization of up to 80%, and disappears rapidly with a time-of-day ratio." Currently, some astronomers are said to be trying to figure out what object could send it out. The mystery radio waves are said to vary in intensity, oscillating in only one direction, circling from day to day, and randomly flashing on and off with no visible schema.
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"We've never seen anything like it. At first, we thought it could be a pulsar -- the densest kind of dead, swirling star -- or a type of star that emits massive solar flares. But the signal from this new source didn't match what we were expecting to expect from this type of celestial body," said Ziteng Wang, a Ph.D. student at the University of Sydney and special author of the paper in a statement quoted by techadar.com, Wednesday (13/10).
Because the strange waves didn't fit into the schematic or source we had previously encountered, Wang said they could represent signals from a completely unrecognizable class of objects. But the object might be hard to think about given the strange character of the signal.
"Looking into the center of the Galaxy, we found ASKAP J173608.2-321635, named after its coordinates. This object is unique in that it was initially invisible. Then it brightened, disappeared, and came back. This attitude is truly amazing," said Tara Murphy, Wang's supervisor. on the Sydney Campus.
However, the strange character of this new discovery is by no means entirely unique. In these years. Initially, some astronomers have found that the universe is filled with radio waves that have just been detected.
"The information we have [about the mysterious wave object] is very similar to other classes of mystery objects known as Galactic Central Radio Transients, including the so-called 'cosmic burper'," said David Kaplan, professor at the Wisconsin-Milwaukee College who said, co-supervisor Wang. "While our new object, ASKAP J173608.2-321635, does share some properties with GCRT, there are also dissimilarities. And we don't really understand some of these sources, so this adds to the mystical," concluded Kaplan.