Scientists in Perth, Australia have detected an unusual radio signal originating from space that repeats every hour, puzzling astronomers with its unique characteristics. The signal, officially named ASKAP J1935+2148, cycles through three different states, switching between bright flashes with linear polarization, weaker pulses with circular polarization, and moments of silence. This enigmatic signal, repeating every 53.8 minutes, challenges current understanding of physics due to its irregular behavior.
Despite popular assumptions, the scientists involved in the discovery have ruled out the possibility of extraterrestrial origins for the signal. Instead, they speculate that the signal may be emanating from either a neutron star or a white dwarf. The characteristics of the signal do not align neatly with the expected properties of these celestial bodies, introducing a new layer of complexity to the investigation.
Neutron stars and white dwarfs, both remnants of massive stars, are the main candidates for producing such a diverse radio signal. Neutron stars are known for emitting regular radio waves, potentially influenced by interactions between their strong magnetic fields and complex plasma flows. However, the slow rotation rate of once every 54 minutes challenges existing theories, leading researchers to reconsider their understanding of these cosmic phenomena. On the other hand, white dwarfs could plausibly rotate at such a slow rate, yet the emitted radio signals remain unexplained by current scientific knowledge.
The groundbreaking findings regarding the mysterious radio signal have been documented in the journal Nature Astronomy, prompting further exploration and discussion within the scientific community. The discovery opens up new avenues for research and challenges long-standing assumptions about the behavior of neutron stars and white dwarfs in the Milky Way galaxy. As astronomers grapple with the complexities of this enigmatic signal, the quest for unraveling the mysteries of the universe continues.