Astronomers from ICRAR Detects 'Megamaser' through South African MeerKAT Radio Telescope

Posted  by GoPhotonics

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An international team of astronomers led by Dr. Marcin Glowacki has discovered a powerful radio-wave laser, called a "megamaser", by the MeerKAT telescope in South Africa. The record-breaking find is the most distant megamaser of its kind ever detected, at about five billion light-years from Earth. The light from the megamaser has traveled 58 thousand billion billion (58 followed by 21 zeros) kilometers to Earth.

Dr. Glowacki, who is now based at the Curtin University node of the International Centre for Radio Astronomy Research (ICRAR) in Western Australia, said megamasers are usually created when two galaxies violently collide in the Universe. “When galaxies collide, the gas they contain becomes extremely dense and can trigger concentrated beams of light to shoot out,” he said.

“This is the first hydroxyl megamaser of its kind to be observed by MeerKAT and the most distant seen by any telescope to date. It’s impressive that, with just a single night of observations, we’ve already found a record-breaking megamaser. It shows just how good the telescope is.”

The record-breaking object was named ‘Nkalakatha’ [pronounced ng-kuh-la-kuh-tah]—an isiZulu word meaning “big boss”. Dr. Glowacki said the megamaser was detected on the first night of a survey involving more than 3000 hours of observations by the MeerKAT telescope.

The team is using MeerKAT to observe narrow regions of the sky extremely deeply and will measure atomic hydrogen in galaxies from the distant past to now. The combination of studying hydroxl masers and hydrogen will help astronomers better understand how the Universe has evolved. “We have follow-up observations of the megamaser planned and hope to make many more discoveries,” Dr. Glowacki said.

MeerKAT is a precursor instrument for the Square Kilometre Array—a global initiative to build the world’s largest radio telescopes in Western Australia and South Africa.

Click here to read the paper titled "LADUMA: Discovery of a luminous OH megamaser at z>0.5".