The new star HD74423, what are the new characteristics and cause?

A new type of star has just been discovered

Special stars appear on people's field of vision, which means that humans will leave more footprints on the way to open the secret entrance. Continuous comparison will make the brutal side of the soul highlighted, and the competition between the universe will start. Just like people discovered this star, the hard and cold traits have stimulated people's unskilled wildness, wild nature, wild nature, and wild nature. Drive people to keep searching for the road of life. It appeared, and it was different from the previous theory of other scientific circles. In the end, everything was confirmed! This is a fate that spans thousands of years.

A single -edge pulse star was found in the Galactic, about 1500 light years from the earth. This is the first time to discover such a unique star.

It is the first one

"First of all, what I noticed was that the chemical nature of this star was very special," said Simon Murphy, the University of Sydney. "Usually this type of star is rich in metal, but this is not the case, which makes it a rare hot star." When sharing this discovery with other astronomers, Murphy found that some of them have started to study research. This star named HD74423 is about 1.7 times the quality of the solar. Their discovery was published in the magazine of Natural Astronomy.

"We have known such stars in theory from the 1980s," we continued to say that Don Kurtz, the University of Langcarst University, "I spent nearly 40 years looking for such a star for nearly 40 years. We finally found one. "

The pulse star has long been known in the astronomical community. Their morphology is periodic changes, which can be observed in both young and old stars, depending on multiple factors. But as of now, one feature observed fluctuations are: fluctuations can be seen from any side of the stars.

Abnormal fluctuations may be due to the existence of red dwarf stars

By studying HD74423, researchers found that its fluctuations seemed to be limited to one hemisphere. According to them, the following principles can be used to explain the fact that this star is part of the double star system, and the other part is composed of red dwarfs: due to the gravity applied, the volatility of HD74423 deforms. This pair of star systems also perform a special role in performing a track in a short time (less than 48 hours), which will also play a role in this phenomenon.

These discoveries were discovered with the help of TESS (Lingri Foreign Planet Survey Satellite). The abnormal brightness changes in HD74423 were initially discovered by amateur astronomer.

Although HD74423 is the only known star with this characteristics at present, researchers believe that in the next few years, the in -depth analysis of data collected by TESS and the improvement of the improvement of the star -sho space telescope instruments and technology should be able to detect them to detect them. Stars with more characteristics.

related information

The star is a celestial body, a spherical glow plasma condensed together by gravity, and the sun is the star closest to the earth. Almost all other stars that can be seen on the earth are in the galaxy, but because the distance is very far away, these stars seem to be just a fixed lighting point. Historically, the more significant stars are formed of the constellations and star groups, and the brightest stars have proper traditional names. The star directory combined by astronomers provides many standards for different stars.

The star will perform the nuclear reaction of heavy elements in the core, transmitting energy outward from the inside of the star, passing through a long path, and then radiating from the surface to the outer space. Once the core nuclear reaction is exhausted, the life of the star is about to end. The core of the stars has been nuclear fusion throughout the life. At the end of life, the stars will also include simplified substances. Observation of the movement, brightness and spectrum in the space through observation of the quality, age, metal quantity (the abundance of chemical elements), and many other attributes of a star. The total quality of a star is the main factor of star evolution and decision to decide the final fate: stars in their lives, including diameter, temperature, and other characteristics. They will change at different stages of life, and the environment around the star will affect its rotation and movement Essence The temperature of many stars is relative to brightness, that is, Herrort (H-R diagram), which allows us to measure the age and evolution of a star.

The life of the stars starts from the collapse of the gravitational nebula (mainly consisting of hydrogen, 氦, and other trace elements). Once the core has sufficient density, the nuclear fusion reaction of hydrogen agglutation can be continuously continued, and the energy generated during the release process [1]. The other parts of the star will be combined to form a radiation layer and the stream layer to transmit energy outward; the pressure inside the star can prevent it from continuing to collapse inward due to its own gravity.

The core of the stars has been compiled throughout the life. Once the core has the core heavy element nuclear reaction, the star with a quality of more than 0.4 solar quality [2] will swell and become a red superstar. In some cases, the core will integrateBecome heavier elements.Then this star will evolve a simplified form and return some material to the environment of interstellar space.The substances released in the middle help form a new generation of stars, which will contain a high proportion of heavy elements [3].At the same time, the core becomes a star wreckage: white dwarf, neutron stars, or black holes (if it has enough quality).By: yann contegat

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