Monday , August 2 2021

SIC News | Astrophysicists identify the galaxies of the early universe



The results of the discovery, published in the scientific journal Astronomy & Astrophysics, were revealed in a statement by the Institute of Astrophysics and Space Sciences (IA), where scientist Coordinator Fernando Buitragão works.

Researchers have discovered a new set of 29 "massive and ultra-compact" galaxies at a distance of two to five billion light-years from the Earth. Seven of these galaxies are primary, "which have remained intact without interacting with others since their creation more than ten billion years ago," a statement said.

The universe was born about 14 billion years ago. How these "galactic relics" remain intact for a long time cosmically remains a mystery for scholars.

However, stressed researcher Fernando Buitrau Lousa, "are real windows of how the universe is at the beginning." To identify "galactic relics," his team explores "a very large part of the sky," equivalent to 360 times the size of the full moon, and calibrates all galaxies by the number of stars and their size.

Ultimately, astrophysicists retained 29 ultra-competent galaxies and concluded that seven would be compatible with very old galaxies. For Fernando Buitraggo, quoted in an EA statement, if one "understands the properties" of more massive galaxies, "it will be possible" to understand the possible fate of all other galaxies, including the Milky Way itself. "

Ultra compact galaxies have more stars than the Milky Way, equivalent to more than 80 billion stars like the Sun and are therefore very bright.

But the stars that form these galaxies are "packed in a much smaller size" than the Milky Way, notes the note of the Institute of Astrophysics and Space Sciences.

To try to understand how the seven ancient galaxies have remained intact for twice the time of Earth's formation without interacting with other galaxies, Fernando Buitraggo's research group proposes to study its chemical composition by decomposing the light they emit and the galaxies which are close to them.

Lusa


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