South African Telescope

(NLDO) - Many round, faint objects that cannot be observed with the naked eye or under normal light have been captured by two radio telescopes.

Presented on The Conversation, the team of authors led by Professor Miroslav Filipovic from Western Sydney University and Professor Andrew Hopkins from Macquarie University introduced the "ghosts of the radio universe" captured by the two telescope systems ASKAP and MeerKAT.

Called "ghosts of the radio universe" because these objects are completely invisible to the naked eye or under visible light, but can only be observed under radio light.

One of the "ghosts of the radio universe" captured by the ASKAP telescope system - Photo: ASKAP

The two sky scouts ASKAP and MeerKAT are two of the most powerful radio telescope systems in the world . ASKAP is located in Australia, while MeerKAT is in South Africa.

These "ghosts" were all round, vague and mysterious. Subsequent analysis revealed the nature of each, showing that they were very different things.

The two circles are called the Kyklos Ghost Belt and the object WR16 is identified as a Wolf-Rayet star.

Kyklos ghost belt and object WR16 - Photo: ASKAP/MEERKAT

As massive stars run out of fuel, they become unstable entering one of the final stages of their stellar life cycle, becoming Wolf-Rayet stars.

They begin to surge and pulsate, shedding outer layers and forming bright nebular structures around the star.

Meanwhile, Stingray 1, Perun, Ancora and Unicycle are supernova remnants, stars that have exploded, leaving behind a sphere of material that has not yet dissipated in the sky.

Stingray 1, Perun, Ancora and Unicycle - Photo: ASKAP/MEERKAT

Meanwhile, the circle named Lagotis is a reflection nebula, a cosmic mirror made of gas and dust clouds, reflecting light from nearby stars.

Additionally, there are a number of objects classified as Odd Radio Circles (ORCs), a new class of objects of unknown origin.

According to scientists , MeerKAT and ASKAP are revealing incredible insights into the low-surface brightness part of the universe. Surveys using these two warriors promise to reveal more about what humanity has never known.

Source: https://nld.com.vn/kinh-vien-vong-nam-phi-uc-chup-loat-bong-ma-tron-bi-an-196250306095010615.htm