Scientists have found two remote stars of hyper-speed

Scientists have found two remote stars of hyper-speed

LAMOST spectra: LAMOST-HVS1 (top), LAMOST-HVS2 (middle) and LAMOST-HVS3 (bottom)

Chinese astronomers led by Yang Huan discovered two new, unrelated stars of hyperspeed. The distance between them is 70,000 light years.

Such objects represent a rare class of stars with high velocities exceeding the rate of departure from the galaxy. Scientists believe that they are formed near the galactic center and are activated due to the dynamic contact of a double star and a massive black hole. If the usual speed is 100 km / s, then it accelerates to 1000 km / s.

It is believed that in our galaxy there are about 1000 such stars, but only 20 were able to determine exactly. Objects move over long distances, so they can be convenient tracers for calculating the mass distribution in the Milky Way. With their help, you can better understand the shape of the halo. That is why the team investigated the data from the spectrometer LAMOST. They managed to find two new copies, deprived of communication with each other.

LAMOST-HVS2 belongs to the B2V spectral type, reaches 7.3 solar masses, and the temperature is 20600 K. It is removed for 72500 light years from us. With a temperature index of 14,000 K, LAMOST-HVS3 is of type B7V and is 72760 light years distant.

The researchers believe that they could appear from the galactic center, and the original stars are based on young star systems. But this is just a hypothesis that has yet to be confirmed.

Comments (0)
Search