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An explanation of a very huge star that comes out of huge amounts of matter in space. | Credit: Robert Lea (created with Kanfa)
The very huge stars that collapse to create much black holes may vomit during their short lives than we thought before.
To comply with the astronomical notes of these stars, which have more than 100 times fans SunA team of scholars estimated this Very huge stars It must be Star winds Much is much stronger than it has been appreciated in the past. This wind should be strong enough to detonate the outer layers of these brutal stars in space.
The team modeling has revealed how the stars can lead to the integration of stars that depict one very huge stars. They also discovered the impact of the stellar wind Black hole Population, referring to a long -standing formation Medium black holes.
“It is very huge stars like” rock music stars “in the universe – they are strong, and they live quickly and die,” said team member Kendall Shabard, a member of the Italian abbreviation, Cindal Shabard, a researcher at the Institute of Advanced Study in Italy (known by its Italian abbreviation.
While our medium -sized sun is expected to live 10 billion yearsVery huge stars burning through Nuclear fuel Faster, lives for only a few millions of years, or even a few hundred thousand years.
Shebred said that studying this giant is important because they have a profound impact on their environments despite their short lives.
“The strong winds of very huge stars and their salary in the end Supernova explosions She said that the newly formed elements in the environment. Many of these elements are the basis for the new stars, while others, such as carbon and oxygen, are the blocks of life.
“They are also the predecessor of black holes, including the black hole diodes that merge and produce Gravity waves To discover on the ground. “
The diet for the loss of the star’s mass
In the new research, Shepherd and her colleagues analyzed theoretical studies and observation of the very huge stars.
“Such huge stars are very rare, and have found a few monitoring restrictions,” Shabred said. “With the help of space and earthly telescopes, researchers recently managed to monitor many stars in The nebula Subordinate Great Magical Cloud With fans over 100 times from our sun block for the first time. “
These previous studies have found that the most large stars in TARANTULA are a hot and bright type of abstraction mostly Wolf stars (WNH Stars) At the end of the hydrogen burning stage, which means that they show hydrogen residue on its surface.
“These stars have been found to be very hot, about 72,540 to 90,000 degrees Fahrenheit (from 40,000 to 50,000 ° C). These standard models are very hot! Standard models predict, with the era of stars, they should expand and cool, unlike what new notes showed.” “The researchers put the two pieces together and used the monitored properties to calibrate” a recipe “to lose the mass to integrate theory and monitor.”
The team worked on this recipe in its star development code, known as Persec (Padova and Trieste Stellar Evolution Code), to create a new model that represents the huge stars of TARANTULA.
“Our new models, which are characterized by strong stellar winds, are now able to match the notes and theory. The strong winds get rid of the outer layers of the star, which prevents them from cooling, while maintaining the formation of the WNH Star surface,” explained. “The star remains more tight and hot for a longer period, which indicates exactly notes.”
The impression of this artist shows the relative sizes of young stars, from the smallest red dwarves, which weigh about 0.1 solar blocks, through low-mass yellow dwarves, such as the sun, to huge blue dwarf stars weighing eight times more than the sun, as well as the 300-Solar-ASS star called R136A1. | Credit: European Southern Observatory
The team’s research indicates that there are two different paths that can lead to the birth of stars like the most largest stars ever, R136A1. This star, also found in TARANTULA, has up to 230 times the sun’s mass and emanates of more energy than our star. He is only 1.5 million years old, compared to 4.6 billion years–The age of age.
The team model indicates that the R136A1 could have been born as one star, or would have been a result of a wonderful integration.
“I was surprised that our results give two distinct potential explanations for the origin of the R136a1, the most widely known star. I was completely fascinated by the bilateral stars – as two stars integrate and become one larger star – can provide reasonable origin.” “The most interesting is the difference in the primary mass required to reproduce the R136A1 of the single and dual star merger scenarios.”
The researcher added that for one of the stars to match the features of the R136A1, the star will need a initial mass of more than 100 solar masses-more than what is required to obtain a wonderful integration origin, regardless of the wind recipe used.
“This could indicate a review of what we thought was the highest limit of the extent of the star in the local universe,” Shabred said.
What is the trend that blows the wind for black holes?
Strong stellar winds and the loss of fast mass that also cause strong effects on fans Black holes Which is created when the huge stars collapse under their weight at the end of their lives.
“Because the strongest wind stripped a lot of the star’s mass, at the end of their lives, it constitutes smaller black holes.” “This study can highlight the prediction of the black hole blocks. Summary models that use standard and weaker losing recipes can produce medium -mass black holes.”
These black holes, which range from 100 to 10,000 huge times more than the sun, have It is difficult for astronomers to find it.
“By the stars lose more mass through stronger winds, simulation produces less than these unconfirmed things, making our models more in line with what is in nature!” The shepherd said.
Explanation of artists of two black gaps revolving around each other and collision, 1.4 billion light years of Earth. Creating fusion ripples in space time called gravitational waves. Ligo discovered those waves in December 2015. Credit: Lego
The team also suggests that, unlike the current thinking, stronger stars are needed if the systems will develop into Black hole diodes With the masses larger than about 30 times than the sun.
“When we looked at the bilateral black holes that merge into our simulation operations, our new strong wind models were able to produce systems where the black holes were huge.” “This is exciting because this population was observed with them Gravitable wave detection devicesBut previous models with standard winds are struggling to produce them. “
Black holes are emitted in these diodes small ripples in space called Gravity waves Because it is escalating together and eventually merge. But strong stellar winds may be the key to allowing this position to develop.
“With the weakest and standard winds, the two stars are most likely expanding and most likely to merge before they become black holes,” she explained. Shepherd. “In contrast, the strongest winds can push the two stars from each other, allowing them to stay as a husband of black holes that can escalate at a later time and merge.”
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The new research focused on one specific environment, in the Magellanic big cloud, which has a unique chemical composition. Thus, Shabard said, the next step for the team will be an attempt to explain a handful of the stars.
“These results are not yet universal, and therefore the next next step is to extend this study to a group of different initial installations, to model different environments across universeShbred concluded. It will be very exciting to know how much the expected black hole sets change with these various initial structures. “
The team’s research is available as a pre -research warehouse Arxiv.
