An artistic illustration of the star S0-2, as it passes the supermassive black hole at the Galaxy’s center. If the star is closer to the supermassive black hole, it experiences a gravitational redshift, which was predicted by Einstein’s general theory of relativity.
By analyzing the extremely strong gravitational pull of the giant black holeat the center of the milky way Galaxy on a star close to it, astronomers have shown that Einstein’s ideas about space and time is still regarded as the best description of how gravity works.
According to Einstein’s theory of general relativity, gravity results from the how mass distorts the space and the time of day. The greater the mass of an object is, the stronger the force of attraction.
Researchers have mainly tested the general theory of relativity, the predictions are in relatively weak gravitational fields, such as those on the Earth and in the solar system. In the presence of a much stronger gravitational fields such as that of the supermassive black holes thought to lurk at the heart of nearly all large galaxies, which researchers have been able to discover any violations of the general theory of relativity, which in turn can lead to new ideas that may help to explain the cosmic mysteries such as dark matter and dark energy.
“Einstein was right, at least for now,” said Andrea Ghez, a co-lead author of the study and a professor of astronomy at the University of California, Los Angeles, california, in a statement. “Our findings are in agreement with Einstein’s theory of general relativity. However, the theory is definitely showing it. It can’t be fully explained by the gravity of a black hole, and at some point we will need to have to go beyond Einstein’s theory to a more comprehensive theory of gravity, which explains what a black hole is.”
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In the new study, astronomers studied the supermassive black hole, Sagittarius A*, abbreviated Sgr A*. This giant is located in the Milky way, at its core, is about 4 million times the mass of our sun, and about 14.6 million miles (23.6 million miles) in diameter.
The scientists monitored the star S0-2 in 2018, when its closest approach to Sagittarius A* at the age of 16 to have a job. The star had a distance of 120 astronomical units (AU) of the black hole, an au is the average distance between the Earth and the sun, about 93 million miles (150 million kilometers) to travel as fast as 2.7% of the speed of light.
With the help of the Keck Observatory, the Gemini Observatory and the Subaru Telescope in Hawaii, astronomers have managed to get to the track with the S0-2 and of full-time employment in the 3D view. They combined these data with the measurements that have been made over the past 24 years.
The researchers examined a prediction of the general theory of relativity known as gravitational red shift,” in which the gravitational force can distort light. A lot of how an ambulance siren sounds higher pitch to the people as well as the driver of the vehicle in the direction of the lower-pitched beep when it moves, the light decreases in the direction of a gravitational field are shifted to the blue end of the spectrum, whereas the light escaping from a gravitational field, it is the red, or redshifted.
“These measurements, a signal of the beginning of a new era where we can finally test the nature of gravity, the orbits of stars around the supermassive black hole at the center of our galaxy,” study lead author Tuan Do, an astrophysicist at the University of California-Los Angeles in Los Angeles, told Space.com.
“It was a long time expected in theory, but it’s really exciting that we will finally be able to do it,” Has been added.”This is an important milestone on the road to the future, a more powerful test of the theory of general relativity and alternative theories of gravity.”
The spectrum of the light detected in the S0-2 was found in the redshifting of the experience of Sagittarius A*’s extreme gravity, in accord with the general theory of relativity. It was “amazing” to see the predictions made by the theory of general relativity “, even though black holes at their centers, a lot of less-extreme black holes at their centers, were not even known when the Einstein’s theory,” I said.
In this research, the S0-2 was the first of many studies of the general theory of relativity, and the scientists are going to be the behavior of stars near Sagittarius A*. One of the victims, S0-102, which is the shortest track of the more than 3000 stars with the supermassive black hole in the take up of 11.5 years, and the circle is complete.
The scientists detailed their findings online today (July 25) in the journal Science.
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The original article Space.com.