60 million light years discovered by mysterious radio, “Origin unknown”

During observations of a spiral galaxy known as NGC 2082Australian astronomers have discovered one Through mysterious light and small radio, Designated J054149.24–641813.7. The origin and nature of this source are unknown and require further investigation. The discovery was reported in a paper published on arXiv on May 23rd.

In general, radio sources are various objects in the universe that emit relatively large amounts of radio waves. The most powerful sources of such emissions include pulsars, some nebulae, quasars, and radio galaxies.

Led by a team of astronomers Joel Balzan Of University of Western Sydney Inside Australia, Reported the discovery of a new radio source, the true nature of which is still uncertain. When observing NGC 2082 using the Australian Square Kilometer Array Pathfinder (ASKAP), the Australian Telescope Compact Array (ATCA) and the Parks Radio Telescope, the researchers identified a point radio source about 20 seconds away from the center of the galaxy. NGC 2082 is a G-type spiral galaxy in the Dorado galaxy about 60 million light-years from Earth, about 33,000 light-years in diameter.

We present NGC 2082’s observations using the ASKAP, ATCA, and Parkes telescopes from 888 MHz to 9,000 MHz. Origin,The researchers wrote on paper.

The study found that the radioluminosity of J054149.24–641813.7 at 888 MHz was 129 EW / Hz and that it had a flat radio spectral index (approximately 0.02). This, according to astronomers, suggests that J054149.24–641813.7 is not favorable for a supernova residue (SNR) or pulsar, which suggests that the source may have a thermal origin.

The researchers found that the small size of J054149.24–641813.7 and its location on the perimeter of NGC 2082 were reminiscent of some rapid radio explosions (FRBs). However, the results show that J054149.24–641813.7 is not as bright as standard radio with a built-in FRB progenitor.

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Astronomers have concluded that J054149.24–641813.7 may be an extracellular background source such as an object close to the star (QSO, quasar), radio galaxy, or an active galactic nucleus (AGN). They added that the flat spectral index supports this hypothesis with slightly weaker polarities at 5,500 and 9,000 MHz. However, no high-definition neutral atomic hydrogen (HI) absorption data for NGC 2082 currently support this hypothesis. “We believe that the probability of finding such a source after NGC 2082 is P = 1.2 percent, and that the origin of J054149.24–641813.7 is the background quasar or radio galaxy,“The teachers explained.

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