Find out how to weigh black holes based on galaxy spiral arms

With this calculation, from astronomers to students can calculate the mass of the black hole.

1. 10 interesting facts about black holes in the universe (Part 1)
2. 10 interesting facts about black holes in the universe (Part 2)
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Astronomers from the University of Minnesota Duluth, USA and Swinburne University of Technology, Australia have discovered a black hole "weight" method at the center of the galaxy by looking at a spiral branch of it.

Black holes never emit recognizable light. Therefore, astronomers often study black holes through stars and atmospheres around their orbits. Since then, they have given a reasonable measure of how big the black hole is.

Based on previous measures, scientists have found that the mass of black holes can be estimated simply by observing its host galaxy spiral arms.

Spiral galaxies are a type of galaxy with spiral arms, usually two branches. The spiral galaxies contain a flat, rotating disk containing stars, gas, dust and bulges, the area that gathers many stars at the center of the galaxy. The spiral arms of the galaxy extend from the center to the disk.

Nearly a decade ago, Professor Marc Seigar at the University of Minnesota Duluth, co-author of this study, discovered the relationship between the mass of the central black hole and the tight density of the twisted branches. a galaxy.

Spiral Galaxy Messier 81, located on the northern constellation of Ursa Big, and has a mass of black holes about 68 million times the sun.

Scientists have relied on it to carry out new research and discover an unexpectedly strong connection between mass black holes and spiral branch geometry. At the same time, they also predict that lower mass black holes in the galaxy will have open spiral arms.

The power of this relationship makes it possible for anyone to assess how black the hole behind a large spiral galaxy looks at its image. This is a better method than any other method used to predict the previous black hole mass.

By looking at the different levels of tightness of the spiral arms, the masses of the central black hole and the corresponding galaxy in the mass units of the galaxy estimate the masses of black holes in the spiral galaxy.

This method also allows to predict the mass of black holes in pure galaxies with bulging segments filled with constellations.

Based on the relationship between black hole mass and spiral branch geometry, scientists can also study medium mass black hole communities (about 100 to 100,000 times larger than the sun), losing calculus at the present time. They have a much larger mass than any single star, but are smaller than huge black holes and billions of times heavier than our Sun.