Most often, stellar cores are covered in what scientists call an “opaque envelope.” But according to the theory,
As the study authors note, the discovery"exposed core" was accidental. They initially observed a group of stars, including γ Columbae, which was considered "normal." Further observations of the group showed that one of them was unusual. Astronomers carefully studied its light spectrum and discovered that the star does not have an envelope.
For such an object to exist, something mustwas to tear it off from an ordinary star, leaving behind only the core. According to scientists, up to this point the star γ Columbae was about 12 times heavier than the Sun. It is now only five times larger than our star.
The discovery is truly unique. Such an object would not remain in the form of an exposed core for very long—perhaps only 10,000 years, the blink of an eye in astronomical terms.
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