„Black holes release a huge amount of energy, which removes gas from galaxies, and thus models the history of its star formation, ”Says Professor Avi Loeb of Harvard University and co-author of the study. “While astronomers know that the mass of central black holes has had a decisive effect on their parent galaxies, measuring the impact on their rotation is not easy. The effect of black hole rotation on the orbits of nearby stars is more accurate and difficult due to direct measurements.“
To help better understand how Sagittarius A * affects the formation and evolution of the Milky Way, Avi Loeb and his collaborator Giacomo Fragione of the Center for Interdisciplinary Exploration & Research at Astrophysics and Northwestern University studied the orbits and spatial distribution of S-stars instead to determine the limit. rotation of a supermassive black hole.
„We have concluded that a supermassive black hole is at the center of our Galaxy rotuje slowly, ”Says Giacomo Fragione. “This can have significant implications for detectable activities in the center of our Galaxy and future observations using the Event Horizon Telescope (EHT)..“
Author: ESO / L. Sidewalk / spaceengine.org
S-type stars appear to be arranged in two preferred planes. The authors showed that if Sagittarius A * had a significant rotation, the preferred orbital planes of these stars at birth would be currently deflected.
„For our study, we used the recently discovered S-type stars, showing that the rotation of Sagittarius A * must be less than 10% of its maximum possible value, which corresponds to a black hole rotating at the speed of light, ”Says Avi Loeb. “From another point of view, the normal orbital planes of these stars would not be maintained throughout their lives as we see them today..“
The findings of the research team also point to another important detail regarding the source of Sagittarius A *: it is unlikely that there are jets (so-called jets).
„The jets will probably be accelerated by a rotating black hole that acts like a giant wheel blade, ”Says Avi Loeb.
Fraction. “Upcoming analyzes of data from the Event Horizon Telescope may shed much more light on this problem.“
Resources and recommended links:
[1] sci-news.com
Taken over: Valašské Meziříčí Observatory
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