Study explores how “Little Red Dots” may host early organic chemistry

The James Webb Space Telescope has revealed mysterious tiny red objects in images of the early universe, using its ability to look back in time. These red objects, called LRDs, are tiny proto-galaxies that existed when the universe was very young. They are extremely small, only a few hundred light-years wide, and appear as small reddish specks in images.

Astonishingly, many LRDs contain huge black holes, possibly millions of times the mass of the Sun. This is surprising because the galaxies themselves are tiny and the central black hole is only a small fraction of the galaxy’s total mass. An example is the Sagittarius A*, which contains a black hole with 4 million solar masses.

These proto-galaxies are expected to be energetic due to their large black holes, which usually produce strong X-rays, powerful jets, and intense radiation. Surprisingly, they show weak high radiation, and have a calm, dust-rich environment. This is very similar to the center of the Milky Way, where Sagittarius A-star lies.

A region called the Central Molecular Zone (CMZ) surrounds the galactic center. It contains dense clouds of gas, large amounts of cosmic dust, and cold molecular material. This makes it a favorable place for chemical reactions due to low radiation. Complex organic molecules such as nitriles have also been detected in the G+0.693-0.027 cloud.

Scientists believe many organic molecules in our solar system originally formed in interstellar clouds, and LDRs may host similar chemistry. This makes their surroundings an ideal environment for the formation of complex organic molecules.