They Appeared 13.1 Billion Years Ago.

Astronomy Science ~ When you look at the picture above, you will see the past more than 13 billion years when the universe was very young. ...

Astronomy Science ~ When you look at the picture above, you will see the past more than 13 billion years when the universe was very young. You see very faint galaxies and the very young, was born shortly after the Big Bang.

These results, according to a new study led by Akira Konno and Masami Ouchi of the University of Tokyo's Institute for Cosmic Ray Research. The astronomers said the 7 galaxies appear suddenly in 700 million years established after the Big Bang.

The team found this galaxy when using the Japanese Subaru Telescope in Hawaii. They say that, although the Hubble Space Telescope have discovered galaxies further away, but the distance of these galaxies around 13.1 billion light years is a milestone within the Subaru telescope.

Seven newly detected galaxies in the early universe, they appeared 13.1 billion years ago.
Seven newly detected galaxies in the early universe, they appeared 13.1 billion years ago.
The astronomers to study was looking for a certain type of galaxies called Lyman-alpha emitters or LAE. Laes is a primitive galaxies, low-mass galaxies and one of the oldest galaxies in the universe. They estimated is the ancestor of modern galaxies, such as the type of the Milky Way. LAE galaxy types play an important role in an event called 'Reionisation cosmic'.

When the universe was 400,000 years old, conditions are cool enough to allow protons and electrons together to form neutral hydrogen atoms. The event called 'recombination' and resulted in the Universe is filled with a 'mist' of neutral atoms.

Finally the first stars and galaxies began to form, and their ultraviolet light ionizes the hydrogen atom, and 'divide' neutral hydrogen into protons and electrons again. As this happens, 'fog' neutral is lost.

A galaxy Lyman alpha emitters (left) and an illustration of what may be seen when viewing these galaxies from a relatively close distance (right) through the Chandra X-ray observatory
A galaxy Lyman alpha emitters (left) and an illustration of what may be seen when viewing these galaxies from a relatively close distance (right) through the Chandra X-ray observatory
Astronomers call this 'cosmic Reionisation' and think that it ended around 12.8 billion years ago - about a billion years after the Big Bang. The event time - when it started and how long it lasts - is one of the biggest questions in astronomy.

To investigate this cosmic Reionisation, the Subaru team looking for early galaxies LAE at a distance of 13.1 billion light years. "Initially we were disappointed, but we realize that this showed LAE object that appeared suddenly about 13 billion years ago. "It was an exciting discovery. We can see the luminosity of light suddenly appeared in 700-800 million years after the Big Bang. What would cause this? '

According to the observation team, one of the reasons LAE appear very quickly is Reionisation cosmic.
During Reionisation cosmic time, luminosity LAE become darker than their true luminosity because of the fog of neutral hydrogen. In the analysis of the team, they found the possibility of a neutral mist that fills the universe cleared about 13 billion years ago and LAE suddenly appeared in front of the eyes for the first time.

However, there are other possibilities to explain why LAE appear suddenly, "said Dr. Ouchi, principal investigator of this. "One is the blobs around the neutral hydrogen disappeared LAE. Our discovery is key to understanding the cosmic Reionisation and properties of LAE in the early universe. "
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Astronomy Science: They Appeared 13.1 Billion Years Ago.
They Appeared 13.1 Billion Years Ago.
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