The most mysterious feature of the Sun was typical of many stars

© MPI for Solar System Research/MarkGarlickНедра of the Sun and other stars with anomalous rotation speed of the subsoilThe most mysterious feature of the Sun was typical of many stars© MPI for Solar System Research/MarkGarlickПодпишись to daily updates RIA Science

Thank you for subscribing

Please check your e-mail to confirm your subscription

One of the most puzzling features of the Sun – different speed of rotation of the matter near the equator and in temperate latitudes – was typical of the dozens of nearby stars. Write about astrophysics, published an article in the journal Science.

«Our measurements show that many stars rotate around its axis in the same way as does the Sun. Surprisingly, the difference in speeds at the equator and at high latitudes, many of them were still higher than that of our sun. This is not predicted by any model and theory,» said Laurent Gieson (Laurent Gizon) of the Institute for the study of the Solar system in göttingen (Germany).

The speed of rotation of stars around its axis is one of the most important properties for astronomers, as it allows you to calculate the age of light, to clarify its type, to understand how often within it occur «Zvezdochetova» and find out if he has a companion. As a rule, young stars rotate faster than old stars, than are the scientists when you search for «twins» of the Sun and newborn stars.

The first observations of the structure of the solar interior revealed two unexpected anomalies – was that matter at the equator luminaries rotates about a third faster than its poles in temperate latitudes, and the inner layers move noticeably faster than the outer shell of our star. Both are extremely difficult to explain in current theories describing the birth of the stars inside the gas and dust nebulae.

Both of these anomalies, as noted by Gieson long forced scientists to argue about whether such behavior is «normal» for all luminaries, or the Sun is unique in this respect. To test if this is really extremely difficult because of the large distance between the Earth and the closest analogues of the Sun.

Gieson and his colleagues were able for the first time to conduct such measurements, using data collected by the telescope «Kepler» in the first phase of its work in orbit, during which he continuously watched by hundreds of thousands of stars on the junction of the constellations Cygnus and Lyra.

Selected four dozen of the brightest and closest to us stars, the astronomers tried to find the traces of seismic waves associated with the motion of matter in their interior, in the periodic changes in their brightness. These researchers compared the data with similar oscillations in the solar interior, in order to understand, which is characteristic for them the same anomaly in the speed of rotation.

As it turned out, from 13 stars, about a third of the stars observed by Gieson and his team, worked about the same way as the Sun. Moreover, in most cases, the differences in the velocity of the equator and temperate latitudes was even more pronounced – their speed differed by 1.5-2 times.

This discovery was a great surprise to the astrophysicists – such differences not just difficult, but virtually impossible to reproduce using computer models of subsurface bodies describing the motion of the plasma flows and the structure of their magnetic fields.

According to astrophysicists, these anomalies may be associated with how magnetic fields existing in the deep layers of the star heat up their matter that control which way it moves.

Check these ideas, as noted Gieson, will be possible in the next century, when the telescope will be launched PLATO, with their greater sensitivity to «Zvezdochetova» than «Kepler».