A team of scientists that is working on an Australian radio telescope Murchison Widefield Array (MWA), beginning the search of the first stars that formed after the Big Bang. It is not about the luminaries: astronomers are looking for traces of neutral hydrogen, which interacted with them in their formative stages of the Universe.
How the stars formed after the Big Bang
According to conventional theory, the Big Bang the universe was extremely hot in order that it could form atoms. And this, in turn, excluded the formation of stars, according to Universe Today.
After about 377 thousand years the universe had cooled sufficiently to form neutral hydrogen and a little helium. When the first atoms began to coalesce into structures like stars, dwarf galaxies and quasars, their light spread through the Universe, reinsure neutral hydrogen, which became the object of the search team.
What and how are researchers
To search for primary neutral hydrogen, “charged” the first stars, scientists have changed the configuration of the telescope, commissioned in 2013. Its 2048 antennas composed of 256 cells instead of the initial 128.
First, the wavelength of this hydrogen was 21 centimeters, but the expansion of the Universe, she grew up to two meters. Now, such signals are easily lost among radiation from natural and anthropogenic sources.
All of these sources is many orders of magnitude stronger than the signal we are trying to catch. Even the FM radio signal that bounced off the plane and passed through the sensors of the telescope, enough to “pollution” of the data
– astronomers say.
How long will it take scientists
To filter the signals the researchers used the supercomputer Correlator, but how much time may be needed to achieve the goal, they are not misleading.
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