Hot gas bubble spotted spinning around Milky Way black hole

Published September 23, 2022 Updated September 23, 2022 09:19am
A VIEW of the massive black hole at the centre of the Milky Way, with an artist’s illustration indicating where the modelling of data gathered from the telescope at Chile’s Atacama desert predicts a hot spot to be and its orbit around the black hole.—AFP
A VIEW of the massive black hole at the centre of the Milky Way, with an artist’s illustration indicating where the modelling of data gathered from the telescope at Chile’s Atacama desert predicts a hot spot to be and its orbit around the black hole.—AFP

PARIS: Astronomers said on Thursday they have spotted a hot bubble of gas spinning clockwise around the black hole at the centre of our galaxy at “mind blowing” speeds.

The detection of the bubble, which only survived for a few hours, is hoped to provide insight into how these invisible, insatiable, galactic monsters work.

The supermassive black hole Sagittarius A* lurks in the middle of the Milky Way some 27,000 light years from Earth, and its immense pull gives our home galaxy its characteristic swirl.

The first-ever image of Sagittarius A* was revealed in May by the Event Horizon Telescope Collaboration, which links radio dishes around the world aiming to detect light as it disappears into the maw of black holes.

One of those dishes, the ALMA radio telescope in Chile’s Andes mountain range, picked up something “really puzzling” in the Sagittarius A* data, said Maciek Wielgus, an astrophysicist at Germany’s Max Planck Institute for Radio Astronomy.

Just minutes before ALMA’s radio data collection began, the Chandra Space Telescope observed a “huge spike” in X-rays, Wielgus said.

This burst of energy, thought to be similar to solar flares on the Sun, sent a hot bubble of gas swirling around the black hole, according to a new study published in the journal Astronomy and Astrophysics.

The gas bubble, also known as a hot spot, had an orbit similar to Mercury’s trip around the Sun, the study’s lead author Wielgus said.

Published in Dawn, September 23rd, 2022

Opinion

Editorial

UNGA speech
25 Sep, 2022

UNGA speech

CRISES test a nation’s resilience but also provide opportunities to rise and move forward. Prime Minister Shehbaz...
Dar’s return
Updated 25 Sep, 2022

Dar’s return

Dar will now be expected by his party to conjure up fiscal space for the govt to start spending ahead of the next elections.
Iran hijab protests
25 Sep, 2022

Iran hijab protests

FOR over a week now, Iran has been witnessing considerable tumult after a young woman died earlier this month in the...
Post-flood economy
Updated 24 Sep, 2022

Post-flood economy

WITH a third of the country — especially Sindh and Balochistan — under water, over 33m people displaced, and...
Panadol shortage
24 Sep, 2022

Panadol shortage

FROM headaches to fever to bodily pain — paracetamol is used ubiquitously in Pakistan as the go-to remedy for most...
Star-struck cops
24 Sep, 2022

Star-struck cops

IN this age of selfies and social media, it is easy to get carried away in the presence of famous people, even if ...