Astronomers have measured the gravitational noise and found a way to compensate for it
The calculations showed the amount of error due to the influence of the gravitational field of our Galaxy.
MOSCOW, February 21. /TASS/. Astronomers explored the gravitational noise that interferes with accurately determine the coordinates of celestial bodies, calculated the “noise” and found a way to deal with them, said Tuesday the press service of the Moscow physical-technical Institute. This work was conducted by scientists from Astro space center of Physical Institute. Lebedev (FIAN) and the Institute of space research RAS, Moscow Institute of physics and technology and Institute of astrophysics Society. Max Planck (Germany).
Our calculations showed the amount of error due to the influence of the gravitational field of our Galaxy. You will need to account for this effect, when a measurement accuracy of astrometry will reach microsegmentation Marcinkowski researcher of ASC FIAN
In order to determine the astrometric parameters, for example, angular size, position of the stars and any other objects in the visible Universe, we need a coordinate system. All coordinate systems constructed by the coordinates of several hundreds of “defining” sources or reference points that are outside the milky Way. As reference points are usually used quasars, massive black holes, because they almost do not move relative to the objects that are in the milky Way.
The planet Earth is in the depths of the milky way and it is through this galaxy people look at the rest of the Universe.
Turned from the error in determining the coordinates of those reference points — a ray of light from a distant star or galaxy, is deflected when passing by some object, and if encountered in the path of the beam will be a lot of objects, the deviation becomes significant.
Especially much the accuracy decreases when the objects visible through the Central region of our galaxy, because then the light from them passes by a very large number of other massive objects that attract the beam towards yourself.
According to one of the study’s authors, Aleksandra lutovinova, Professor of the Russian Academy of Sciences and head of the laboratory IKI ran, because of this effect the accuracy of measurements is limited, no matter how much you increase the precision of the instruments — objects are moving, the deflection of the beam is changing in time, and reference objects seemed to “wander”. Now the accuracy of the devices is growing, but soon the accuracy of the measurement rests on the error that occurs due to “gravitational noise”.
The researchers used a model of the distribution of matter Galaxies and calculated the error that is created by the gravitational noise. In addition, the researchers investigated the properties of gravitational noise, and now it can be distinguished from observational data and partly to compensate for mathematical methods to improve the accuracy of the observations.