Wednesday October 23, 2019
Home Lead Story Astronomers F...

Astronomers Found Ancient Star Formed By Big Bang

This suggests that it could be as little as one generation removed from the beginning of the universe, the researchers noted

0
//
Earth
Astronomers discover ancient star formed by Big Bang, pixabay

A team of astronomers have found what could be one of the universe’s oldest stars, almost entirely made of materials formed by the Big Bang.

Residing in the same part of the Milky Way galaxy as our own solar system, the star is believed to be up to 13.5 billion years old which is evidenced by its extremely low metal content, or metallicity, Xinhua news agency reported.

According to co-author Andrew Casey, it was previously believed that the first stars that formed in the universe could not possibly still exist today.

“The findings are significant because for the first time we have been able to show direct evidence that very ancient, low mass stars do exist, and could survive until the present day without destroying themselves,” Casey said.

Keplar, NASA
According to co-author Andrew Casey, it was previously believed that the first stars that formed in the universe could not possibly still exist today. VOA

The metallicity of stars increases as they are born and die, in a cycle which results in the creation of more and more heavy metals, with the Earth’s sun being around 100,000 generations down that line and holding a metal content roughly equal to 14 Jupiters.

Stars created at the beginning of the universe, however, would have consisted entirely of elements like hydrogen, helium and small amounts of lithium – meaning the extremely low metallicity of the newly discovered star, about the same as the planet Mercury.

This suggests that it could be as little as one generation removed from the beginning of the universe, the researchers noted.

Also Read- Artificial Intelligence Will Match Humans By 2062: Experts

Up until around 1990, scientists believed that only massive stars could have formed in the early stages of the universe, and could never be observed because they burn through their fuel so quickly and die.

However, the new study has shown that it is possible for low mass stars to last as long as the 13 billion years since the Big Bang — Red Dwarf stars for instance, which have a fraction of the mass of the sun, are thought to live for trillions of years. (IANS)

Next Story

Astronomers Use Massive Cluster of Galaxies as X-Ray Magnifying Glass to Spot Tiny Dwarf Galaxy

What they detected appears to be a blue speck of an infant galaxy, about 1/10,000 the size of our Milky Way, in the midst of churning out

0
Astronomers, Galaxies, X-Ray
While galaxy clusters have been used to magnify objects at optical wavelengths, this is the first time scientists have leveraged these massive gravitational giants to zoom in on extreme, distant, X-ray-emitting phenomena. Pixabay

Using a massive cluster of galaxies as an X-ray magnifying glass, astronomers have spotted a tiny dwarf galaxy in the first, super-energetic stages of star formation.

The new lens technique allowed the astronomers to peer back in time, to nearly 9.4 billion years ago.

While galaxy clusters have been used to magnify objects at optical wavelengths, this is the first time scientists have leveraged these massive gravitational giants to zoom in on extreme, distant, X-ray-emitting phenomena.

What they detected appears to be a blue speck of an infant galaxy, about 1/10,000 the size of our Milky Way, in the midst of churning out its first stars — supermassive, cosmically short-lived objects that emit high-energy X-rays, which the researchers detected in the form of a bright blue arc.

Astronomers, Galaxies, X-Ray
The new lens technique allowed the astronomers to peer back in time, to nearly 9.4 billion years ago. Pixabay

“It’s this little blue smudge, meaning it’s a very small galaxy that contains a lot of super-hot, very massive young stars that formed recently,” said Matthew Bayliss, a research scientist in Massachusetts Institute of Technology’s Kavli Institute for Astrophysics and Space Research.

“This galaxy is similar to the very first galaxies that formed in the universe … the kind of which no one has ever seen in X-ray in the distant universe before.”

The detection of this single, distant galaxy is proof that scientists can use galaxy clusters as natural X-ray magnifiers, to pick out extreme, highly energetic phenomena in the universe’s early history, Bayliss said.

“With this technique, we could, in the future, zoom in on a distant galaxy and age-date different parts of it — to say, this part has stars that formed 200 million years ago, versus another part that formed 50 million years ago, and pick them apart in a way you cannot otherwise do,” said Bayliss.

Also Read- Air India becomes First Airline in World to Use “TaxiBot” on Airbus A320 Aircraft Operating Commercial Flight

The findings have been published in the journal Nature Astronomy. (IANS)