HD 65907: The mysterious story of the “resurrected” star

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HD 65907: The mysterious story of the “resurrected” star

By admin, Aralık 21, 2024



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deep in the universe The star HD 65907has properties that confuse astronomers. Although it looks like a young star at first glance, detailed examination reveals that the star is actually much older. So how is this possible? Scientists’ research shows that HD 65907 is a “reborn starIt shows that “.

How is the age of stars measured?

Astronomers use different methods to determine the age of a star. One of the most common techniques is based on the brightness and temperature of the star. All stars spend most of their livesanakolIt has a certain brightness-temperature relationship in a phase called “. This starts from the moment they start melting hydrogen into their cores. Scientists can approximately estimate the age of a star by measuring these two features.

Another method is to measure the amount of heavy elements in the star’s atmosphere. Older stars generally contain fewer heavy elements because they were born at a time when the galaxy was poorer in heavy elements.

The mystery of HD 65907




HD 65907: The mysterious story of the “resurrected” star



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Brightness and temperature data for HD 65907 show that it is approx. A young star that is 5 billion years old shows that it is. However, in its atmosphere almost There are no heavy elements. Moreover, their motion through the galaxy is far from the calm orbit typical of young stars; It follows a very irregular path. This suggests that he recently moved here from somewhere else.

In a new study conducted by international scientists, HD 65907 blue stray He thinks that he is a type of star known as a star, and that he has this strange combination of properties, almost resurrected, due to a violent event in his past.

Answer: Blue stray star

If two low-mass stars collide, the remnants can sometimes survive as an independent star, scientists say. At first, this newly merged star will be both massive and large; Due to the enormous rotation speed that occurs after the collision, its outer surface moves far away from its core. But over time, some astrophysical processes (perhaps strong magnetic fields) slow down the star’s rotation rate and bring it into a stable state. Eventually, the star becomes a blue rambler that appears to be both massive and incredibly hot.

What makes HD 65907 special is that it is not part of a star cluster. Often blue stray stars are found in clusters where stars collide frequently. However, HD 65907 is a star wandering around the galaxy alone. Researchers think that this star “swallowed” a companion star 5 billion years ago and became what it is today. According to the researchers, such studies are crucial to unraveling the complex lives of stars in the Milky Way.






Source

https://phys.org/news/2024-12-hd-mysterious-case-resurrected-star.html


https://en.wikipedia.org/wiki/Blue_straggler


https://en.wikipedia.org/wiki/Main_sequence











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