Hundreds of weird filaments of gas are hiding in our galaxy’s centre

The centre of our galaxy is full of a whole lot of unusual threads of sizzling gas, which can have shaped attributable to an outburst from Sagittarius A*, the Milky Way’s resident supermassive black gap.

Farhad Yusef-Zadeh at Northwestern University in Illinois and his colleagues discovered these filaments utilizing knowledge from the MeerKAT radio telescope in South Africa. In the Nineteen Eighties, Yusef-Zadeh found a set of vertical filaments aligned perpendicular to the disc of the galaxy, however the newfound horizontal filaments have been utterly surprising.

“The vertical filaments are aligned with the galaxy’s magnetic field, but the rest should be randomly aligned,” he says. “The pattern that I saw caught me by surprise – at first, I didn’t believe it.”

While the vertical filaments measured as much as 150 mild years tall, the horizontal ones are solely 5 to 10 mild years lengthy, all pointing in the direction of Sagittarius A*. These horizontal filaments appear to be made of gas, in contrast to the vertical filaments, which are most certainly made up of high-energy electrons. They additionally appear to be transferring away from Sagittarius A*, in the direction of the outer areas of the galaxy the place Earth sits.

The orientations of the filaments and their movement point out that they might have shaped when a jet blasted out of Sagittarius A*, stretching any gas the jet handed by means of into tendrils. Their positions comparatively near the black gap point out it’s most certainly this outburst started about 6 million years in the past and should still be occurring, albeit with a a lot decrease depth now.

There have been some hints from research of the world proper subsequent to Sagittarius A* that such an outburst occurred, however they haven’t been confirmed but. “We really want to piece together these larger-scale structures with the smaller scale around the black hole and show that there really is this jet coming out along the disc of the galaxy,” says Yusef-Zadeh. “That could have really profound implications on our understanding of the spin axis of the black hole.”

It might imply that Sagittarius A*’s spin axis is perpendicular to that of the galaxy as an entire, which might be an necessary clue as to how our galaxy shaped and the way it interacts with its central black gap now.