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Active Spiral Galaxy Core has Torus with Jets

The combination of Chandra and ALMA observations found a torus emitting jets at the core of the active spiral galaxy NGC 5643.

from Wikipedia: " NGC 5643 has an active galactic nucleus and is a type II Seyfert galaxy."

An image is below and the story.


This is an apparent problem for my understanding galaxies in EU.

M87 is an elliptical galaxy which famously had its torus or plasmoid imaged in April. M87 does not rotate like a spiral galaxy. The stars in an elliptical move radially, not in rotation about the sphere's center.

Our Milky Way is a spiral galaxy w/ith several rotating arms.
/
Donald Scott has explained how the birkelund filament pair as the electric current along the galactic axis generates the galactic magnetic field for the observed rotation curve of the stars in the galactic disk..

At the Milky Way core is a Z-pinch of the filaments as the tiny source of energetic synchrotron radiation, extending to X-rays.

To my knowledge no torus has been observed at the Milky Way core. I also thought no jets are being emitted.

However I discovered it might.

Scientific American had a story on 9/25/2013 titled "Milky Way’s Black Hole Is Shooting Particle Jets"

excerpt:

The Milky Way’s giant black hole, called Sagittarius A* has long been theorized to have jets, but evidence was inconclusive. Now researchers have combined x-ray photographs of the galaxy’s center from NASA’s Chandra space telescope with radio data from the Very Large Array (VLA) observatory in New Mexico to offer the best support yet for the idea of jets from Sagittarius A*. The x-ray photos show a wispy bright line of gas that is emitting x-ray light to one side of the black hole—perhaps indicating the jet itself—and the radio observations highlight a wall of gas that scientists think is a shock front created where the jet is slamming into a cloud, snow-plowing the gas into a clump.

Jets arise because the black hole is spinning. As matter falls into the black hole, the matter’s magnetic field gets twisted and amplified by the black hole’s spin, and this pumped-up magnetic field launches material outward in the form of jets. If the signals from Chandra and the VLA really are a jet, its direction would reveal the spin axis of the Sagittarius A* black hole. “Lo and behold, the spin axis appears to be the same as the galaxy,” Morris says. “That’s so satisfying, because that’s what you would expect if the black hole has never undergone a major disturbance.”

Some previous studies, however, suggested the jets pointed in a different direction. The new study is well thought out and “will be a benchmark against future claims of jet orientations,” says astronomer Heino Falcke of Radboud University Nijmegen in the Netherlands, who has also argued for a jet at the galactic center, and recently found that theoretical models favor one.

(excerpt end)

Of course the story is silly  with a spinning black hole, a "wall of gas is a shock front" then "snow-plowing the gas into a clump"  - "because [about the spin axis] that’s what you would expect"

The story concludes with uncertainty whether there are truly jets. Since NGC5643 has them maybe we will find them here too.

Apparently I have to learn how the Z-pinch core in a spiral galaxy can also emit jets. Until now, I thought jets were  limited to a plasmoid, emitted along the axis of the torus.

link-image

link-story

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