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Distant Milky Manner-like galaxy is older than we thought potential

November 9, 2023
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Distant Milky Manner-like galaxy is older than we thought potential
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Artistic representation of how the Milky Way-like galaxy ceers-2112 would look from Earth

Creative illustration of how the Milky Manner-like galaxy ceers-2112 would look from Earth

Luca Costantin (CAB/CSIC-INTA)

Astronomers have noticed the earliest barred spiral galaxy but. It’s the identical kind of galaxy as our Milky Manner, however it dates again to when the universe was simply 2 billion years outdated, sooner than was thought potential.

Such galaxies have a particular bar-shaped construction of their centre manufactured from stars, from which spiral arms stretch out.

About two-thirds of all spiral galaxies, together with the Milky Manner, have a distinguished stellar bar full of toddler stars. Cosmic formation fashions have advised that these galaxies solely began forming some 4 billion years after the massive bang. Now, Luca Costantin on the Spanish Astrobiology Centre and his colleagues have discovered a fair older one.

The researchers noticed the oddity in information from the James Webb House Telescope’s Cosmic Evolution Early Launch Science (CEERS) survey, which has captured new photographs of hundreds of very distant galaxies.

“It appeared a bit bizarre to me,” says Costantin. “We weren’t capable of classify its form at first.”

By cross-referencing with information from the Hubble House Telescope, the researchers recognized it as a barred spiral galaxy, which they named ceers-2112.

The galaxy’s gentle has been travelling since 2 billion years after the massive bang, which occurred about 13.7 billion years in the past. That makes ceers-2112 probably the most distant barred spiral galaxy ever found.

Simulations additionally counsel that the galaxy would have grown to the scale of the Milky Manner by 4 billion years after the massive bang. “If we return in time, the Milky Manner might have appeared like ceers-2112,” says Costantin, who says these observations might assist us enhance galaxy formation fashions and perceive how the Milky Manner and different barred spiral galaxies advanced within the early universe.

“Understanding and discovering galaxies just like the one we discovered is essential,” says Costantin. “It’s a solution to look again in time the story of our galaxy and finally our origins.”

Matters:

  • milky manner/
  • James Webb area telescope



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