Astrophysicists discover the fastest rotating star in the Milky Way

Astrophysicists have discovered the fastest rotating star in the Milky Way. The object, located at a distance of 30 thousand light-years from the Sun, was called LAMOST J040643.69+542347.8. He was discovered by Chinese astrophysicist Guang-Wei Li – a preprint of his article was published on

The researcher discovered the star using the LAMOST spectroscopic telescope. Initial studies of the object showed that it belongs to class O stars – hot blue stars that release hydrogen into the surrounding space.

It was possible to determine the speed of rotation of the star thanks to the analysis of the spectral lines of hydrogen – they turned out to be unusually wide. Additional observations showed that LAMOST J040643.69 + 542347.8 rotates at a speed of about 540 km per second – this is 100 km per second more than the star HD 191423 discovered in 2010.

In addition, the object moves record fast relative to the interstellar medium – such stars are called runaway stars. These include, for example, the previous record holder in our galaxy, HD 191423.

The composition of the star is still unknown – the researcher believes that its study will help to understand the reasons for the rotation of such an object.