Monday , January 18 2021

Future detection of cosmic gravity waves: searches for strange planets around the white dwarf star – Science Exploration – cnBeta.COM

Beijing on August 16 news, Europe is planning a future mission to study gravitational waves for space exploration, which can help scientists find the strange planet in the science fiction (movie) Galaxy Roaming Guide.

Artistic diagram, an exoplanet orbiting a white dwarf surrounded by a disk of debris

In the last few years, with the help of gravity wave signals, humans have discovered the existence of several pairs of black holes. Recently, humans can find planets moving around the double-white dwarf system, which is the state of mid-mass stars at the end of life. The planet that has undergone the evolution of the two stars must be very, very old. Under these circumstances, the two major star sequences have evolved into two white dwarfs, which will take a very long time.

But to this end, more up-to-date research tasks, such as the Laser Interference Space Antenna (LISA) project in Europe, will be needed in the future. Because gravitational wave detectors can be observed more deeply in the universe than electromagnetic waves, LISA may be able to detect planets far beyond the Milky Way.

LISA plans to launch into the air in 2030. Gravity wave detectors such as this are mainly used to detect gravity wave signals generated by dense pairs of objects in the universe. Such a binary system consists of a double white dwarf system. A star like the Sun will become a white dwarf when it is near death, no longer able to produce an internal fusion reaction, it will gradually cool down and die.

Such low-temperature stars are more difficult to detect if they use optical means or other methods of detecting electromagnetic waves. To find the hidden planets around them is more like a fantasy. Scientists have found only a planet around a white dwarf and they are still using indirect observations.

Knowing how many planets can survive around white dwarfs is critical to our understanding of the future evolution of planetary systems. LISA detectors will help scientists do this. Studies show that if such a planet does exist, then LISA should be able to find Hundreds of new exoplanets.

Over the last 30 years, astronomers have discovered more than 4,000 exoplanets. The real breakthrough is from NASA's Kepler space telescope. The Kepler telescope identifies a large number of systems using the Lingsing method. Outer planet. The so-called Lingsing method of precise measurement finds that the planet is moving in the direction of the line of sight, passing in front of the observed star, causing a slight decrease in the brightness of the star, thus allowing scientists to reverse the technology for the existence of the planet.

The use of gravitational wave technology to detect exoplanets will be similar. In simpler terms, a pair of white dwarfs orbiting each other produce a gravitational wave signal that is different from the gravitational wave signal generated by a dual white dwarf system orbiting around a planet. The size of the hidden third target (planetary body).

At the same time, while the distance is not too far, electromagnetic detection means can provide additional data, although the optical band cannot directly monitor the planet. In theory, LISA will be able to detect exoplanets that are only 50 times larger than Earth.

In addition, Tamanini indicated that if there are planets around a white dwarf, it will also produce gravitational wave signals, but such signals are too weak and not the range that LISA or other recently planned detectors can detect.

Unlike the detection of electromagnetic waves, gravity wave detectors can penetrate the fog. LISA can travel through the central area of ​​the Milky Way, detecting signals on the other side of the Milky Way and even signals from other galaxies around, such as the Great Magellanic Cloud.

Star end

About 5 billion years later, our sun will gradually expand into a giant red giant, and then slowly decay into a white dwarf. In this process, the innermost orbits of Venus and Venus will be destroyed. While the orbit of the Earth will move against this huge exploding star, fate is unpredictable, but Mars and the outer planets are largely certain, and they will continue to orbit the sun.

In addition, the death of one planetary system could mean the reincarnation of another new planetary system. Current research shows that large amounts of debris produced in a destroyed world, such as the solar system, when the sun expands, the destroyed debris of Mercury and Venus will eventually revolve around the death of the star. Dwarves are running. There is a theory that after such a situation, these debris will gradually form a second-generation planet in the orbit of the white dwarf, and if the mass of these degenerate planets is large enough, they could be a FOX. And other future gravity wave detectors.

If a white dwarf is added to the system, then the fate of the planet will become less certain. Scientists have at least observed the debris on the planet around a double dwarf system, which at least indicates that the planets may exist in orbit around a double white dwarf.

But until LISA launches, scientists can't determine if there are planets around the double-white dwarf system. Whether it's a rare situation or a general situation, or if there is something between them, if that happens, then finding LISA will help scientists. We are improving their patterns of birth and death of the solar system. We will witness a stage of planetary evolution that has never been known before. If this does not exist, then it will pass a lot to scientists studying the evolution of the planetary system. Important information.

And if the scientists really did find the planet around a double white dwarf system, it would be like the storyline in the Galaxy Roaming manual. In this novel (movie) there is a planet called Magrathea, which orbits about two stars called Sulianis and Ram. The author describes in the book that the light emitted by these two stars is white, which can be two white dwarfs.

Gravity waves may not be the ultimate answer to life, the universe, and everything. But in the end, it can help us find the planet Magrathea.

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