The star of "hidden" in the fold space-time 150 years

Astrophysicists from the Netherlands Institute for Radio Astronomy and the University of Amsterdam published a very interesting results of five observations of the binary pulsar J1906, who in 2004 appeared on the map of the starry sky. Scientists were able to calculate the mass of the binary system. At the end of the pulsar observations again out of sight, which corresponds to the general theory of relativity and the thesis of the bending of the fabric of space-time under the influence of gravity.

J1906 system consists of two neutron stars weighing 1, 291 and 1, 322 solar masses and with a diameter of 10-20 km, which are at a very small distance from each other (100 times less than the distance from Earth to the Sun) and quickly move , making a turn around each other in 4 hours. In this case the pulsar itself rotates on its axis at a speed of seven revolutions per second.



The mass of the pulsar and the companion star i>

Accordingly, in the system there are huge gravitational perturbations, which directly affect the orbit of the pulsar. This is a very shaky orbit and axis of rotation is constantly changing due to the curvature of space-time.

The binary pulsar is in a globular cluster stellar Terzian 5 at a distance of 7670 parsecs from the sun. Discovered in 2004, the Arecibo Observatory (pulsar suddenly appeared on the map of the starry sky), the pulsar emits beams of radio waves every 144 ms. The explosion, which resulted in the pulsar formed, there was a total of 100 thousand. Years ago, its dual system has not yet had time to enter into a stable state.

Terrestrial telescopes can register pulsar only if its radio emission is directed towards us. But hit the curved space star bent its orbit, so now become invisible to us.



In 2005-2009, with the five terrestrial radio telescopes were about a billion revolutions committed pulsar. Astrophysicists have studied in detail the gravitational interaction between the stars and made a model of interaction. According to their calculations, the pulsar will once again be seen from the Earth in the area in 2170.

Perhaps this is a clear demonstration of the curvature of space-time is obtained to date.

"The results of our work is very important as to determine the mass of a celestial body in its free flight is extremely difficult. This is - a problem because the measurement of the mass is necessary for an accurate understanding of gravity as a force, which is closely related to the behavior of space and time at all levels of our universe, "- said Dr. Yuri van Leuven (Joeri van Leeuwen) of the Netherlands Institute for Radio Astronomy in the press conference.

The study is published in the "Astrophysical Journal» and presented at the 225th meeting of the American Astronomical Society.

Source: geektimes.ru/post/244215/