Researchers use radio waves to uncover oldest galaxies

An international team of scientists led by Israeli researchers has developed a method for detecting galaxies of stars that formed when the universe was still in its infancy – during the first 180 million years of its existence.

 

An international team of scientists led by Israeli researchers has developed a method for detecting galaxies of stars that formed when the universe was still in its infancy – during the first 180 million years of its existence.

 

The universe is estimated to be about 14 billion years old, and the farther away a star is, the older it is. Current telescopes, however, can only identify galaxies about 700 million years old, and only when the galaxy is unusually large or a big stellar explosion has taken place.

 

Now, Prof. Rennan Barkana of Tel Aviv University’s School of Physics and Anatomy, is using radio telescopes to seek out radio waves emitted by hydrogen atoms, which were abundant in the early days of the universe.

 

Emitting waves measuring about 21 centimeters long, the atoms reflect the radiation of the stars, making their emission detectable by radio telescopes, explains Barkana. This development opens the way to learning more about the universe’s oldest galaxies.

 

Barkana explains that these waves show a specific pattern in the sky, a clear signature of the early galaxies, which were one-millionth the size of galaxies today. Differences in the motion of dark matter and gas from the early period of the universe, which affect the formation of stars, produce a specific fluctuation pattern that makes it easier to distinguish these early waves from bright local radio emissions.

 

The intensity of waves from this early era depends on the temperature of the gas, allowing researchers to begin to piece together a rough map of the galaxies in an area of the sky. If the gas is very hot, it means that there are many stars there; if cooler, there are fewer stars, explains Barkana.

These initial steps into the mysterious origins of the universe will allow radio astronomers to reconstruct for the first time what the early universe looked like, in terms of the distribution of stars and galaxies across the sky, Barkana believes.

“We know a lot about the pristine universe, and we know a lot about the universe today. There is an unknown era in between when there was hot gas and the first formation of stars. Now, we are going into this era and into the unknown,” says Barkana.

  • http://www.facebook.com/LeonPettyjohn Leon Pettyjohn

    Israel on the Edge of Inovation!

  • http://www.facebook.com/people/Patty-Ann-Smith/100000411012730 Patty Ann Smith

    Gensis1:1 says In the beginning God created the heaven and the earth. This verse says alot, Those two domions God made in the beginning. Heaven, which is everything that is out there that is not earth, are the galaxies with their sun, moon and stars, He has a purpose for them but that purpose will not be established until His righteous eternal Kingdom is set up perfect on Earth which was created a special planet. It is for the righteous dominion of His dear Sons Kingdom. There will never be another planet like earth, but there will be planets that will house eternal righteous mankind through out all aternity. “Earth is our preparation planet” to bring ius into the eternal righteous galxies that will be made up of eternal righteous people forever and ever ,and just like God this new righteous world will never end. Hallelujah!! Isn’t it something how our universe is so vast it is just like it is empty?, and that is the way it will be forever, because it is impossible to fill forever up!. And I am so amazed at how God has placed Jupitor out there to protect us from space objects like meterotites, nothing gets trhough to us unless God allows it, like he did in the days of Noah, to clean up wickedness. And isn’t it awesomely inspiring to know that the stars are where we get the 92 elements that God used to make man from the dust of the ground, and to make everything we will ever need for eternal life?. Genesis 1:26 And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth. This scripture shows us that God had a Son!. We need to be preparing our hearts for this day of His soon eternal righteous kingdon, beginning with 1000 years of peace upon this earth and according to the signs it is almost here. And the question is, just as my great grandmother on my fathers side ( Nancy Mclaughlin Cassel) had written on her tombstone over 100 years ago in Cass W.V…. “BE YE READY?. says In the beginning God created the heaven and the earth. This verse says alot, Those two domions God made in the beginning. Heaven, which is everything that is out there that is not earth, are the galaxies with their sun, moon and stars, He has a purpose for them but that purpose will not be established until His righteous eternal Kingdom is set up perfect on Earth which was created a special planet. It is for the righteous dominion of His dear Sons Kingdom. There will never be another planet like earth, but there will be planets that will house eternal righteous mankind through out all aternity. “Earth is our preparation planet” to bring ius into the eternal righteous galxies that will be made up of eternal righteous people forever and ever ,and just like God this new righteous world will never end. Hallelujah!! Isn’t it something how our universe is so vast it is just like it is empty?, and that is the way it will be forever, because it is impossible to fill forever up!. And I am so amazed at how God has placed Jupitor out there to protect us from space objects like meterotites, nothing gets trhough to us unless God allows it, like he did in the days of Noah, to clean up wickedness. And isn’t it awesomely inspiring to know that the stars are where we get the 92 elements that God used to make man from the dust of the ground, and to make everything we will ever need for eternal life?. Genesis 1:26 And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth. This scripture shows us that God had a Son!. We need to be preparing our hearts for this day of His soon eternal righteous kingdon, beginning with 1000 years of peace upon this earth and according to the signs it is almost here. And the question is, just as my great grandmother on my fathers side ( Nancy Mclaughlin Cassel) had written on her tombstone over 100 years ago in Cass W.V…. “BE YE READY?.