NASA reveals how the magnetic field around the huge black hole in the middle of the Milky Way has stopped it from consuming the matter around it.
- Our galaxy supermassive black hole is not as active as in most galaxies
- The reason why this is the nature of the magnetic field around the hole
- Experts used an aircraft mounted telescope to indirectly map the magnetic field
- Magnetic forces channels dust in orbit around the hole and stops it & # 39; feeding & # 39;
The magnetic field around the supermassive black hole in the middle of our galaxy channels gas particles in orbit around the hole, rather than into it.
The inventory solves the mystery of why Melkvej's black hole is quieter than those in the heart of other galaxies that emit radiation when they consume matter.
NASA experts mapped the field using an infrared light sensor mounted on a flying telescope to detect interstellar dust movements around the hole.
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Most galaxies – super-massive black holes are active, with large amounts of material falling into them and causing them to radiate high energy radiation in the process – strangely, however, one in the heart of the Milky Way is relatively quiet.
Examining this phenomenon, NASA researchers found that the magnetic field around Sagittarius A * channels surrounds gas for orbits around the black hole rather than directly into it,
& # 39; The spiral shape of the magnetic field channels the gas into an orbit around the black hole, & # 39; said the lead study author and astrophysicist Darren Dowell, from NASA's Jet Propulsion Laboratory in Pasadena, California.
& # 39; This could explain why our black hole is quiet while others are active, & # 39; he added.
Invisible but capable of influencing movements of charged particles, magnetic fields have significant effects on how material moves and evolves throughout the universe.
The fact that they cannot be depicted directly means that their exact role is not well understood.
To map out the form and strength of these researchers, therefore, had to study their effects on dust particles floating around the room, which adjusts perpendicular to the magnetic fields.
The magnetic field around Sagittarius A * was made using a telescope built in the earth's atmosphere – and its signal-damping effects – by a special aircraft (depicted by the telescope visible through the open door in the aircraft's rear body)
The grains also emit polarized, far-infrared light which scientists have registered using the new High-Resolution Airborne Wideband Camera-Plus (HAWC +) instrument aboard the Stratosphere Observatory f or Infrared Astronomy (SOFIA).
SOFIA is a modified Boeing 747 aircraft operated by NASA and the German Aviation Center carrying a reflective telescope.
The research vessel flies most of the water vapor in the atmosphere, whose presence blocks some infrared signals from reaching the ground.
highlights the mystery of why Melkvej's black hole, Sagittarius A *, is quieter than those at the heart of other galaxies that transmit radiation that they consume matter. In the picture, in the middle of the Milky Way, an X-ray flare (inset), discovered from Sagittarius A *
& # 39; this is one of the first cases where we can really see how magnetic fields and interstellar material interacts with each other, "said paper writer Joan Schmelz, an astrophysicist at the NASA Ames Research Center in California's Silicon Valley.
HAWC + is a game changer," she added.
The full results of the study was presented at the American Astronomical Society's annual meeting in June 2019 and will be submitted for publication in the Astrophysical Journal
WHAT IS THE SUPERMASSIVE BLACK HO SAGITTARIUS A *
The Melactic Galactic Center is dominated by a resident, the supermassive black hole known as Sagittarius A *.
Supermassive black holes are incredibly dense areas in the center of galaxies with masses that can be billions of times the sun.
They seem like intense grave sources flying dust and gas around them.
Evidence of a black hole in the middle of our galaxy was first presented by physicist Karl Jansky in 1931 when he discovered radio waves from the region.
Prominent yet invisible, Sgr A * has the mass corresponding to about four million suns.
In just 26,000 light years from Earth, Sgr A * is one of very few black holes in the universe, where we can actually witness the flow of material nearby.
Less than one percent of the material originally within the gravity influence of the black hole reaches the incident horizon, or there is no return because much of it is being ejected.
Therefore, X-ray emission from material near Sgr A * is remarkably weak, as is that of most of the gigantic black holes in galaxies in the nearby universe.
The captured material must lose heat and angular momentum before being able to jump into the black hole. The release of matter allows this loss to occur.