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Helium-Rich Hot Subdwarf Stars
March 12 , 2024
118 days
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- A large international team of astronomers has discovered the smallest known star to date.
- Also, it found that it is paired with another, somewhat larger star.
- They burn helium at their cores and are typically found in galactic stellar groups.
- This star is part of a binary system known as J0526 and is located approximately 2,760 light years from Earth.
- The two stars are named J0526A, the larger unseen white dwarf; and J0526B, the hot subdwarf.
- The smaller star is approximately seven times the size of Earth, which means it is smaller than Saturn.
- It also has a surface temperature of approximately 2,226°C.
- It orbits the larger star approximately every 20 minutes.
- This means that it squeezes almost 72 years into just one Earth Day.
- Before TMTS J0526B, one of the smallest stars ever observed was the red dwarf EBLM J0555-57Ab, located 600 light-years from Earth.
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