New research on PDS 70b, a forming exoplanet locate approximately 400 light-years away in the constellation Centaurus, suggests that prevailing models of planet formation may require revision.
As per study publish in Astrophysical Journal Letters, astronomers find a mismatch between the chemical composition of the planet’s atmosphere and the surrounding protoplanetary disk from which it emerge.
The discovery has led researchers to reconsider establish theories regarding how planets accumulate their mass and elements during formation.
The planet, part of a two-planet system, is nearly three times the size of Jupiter and orbits its host star at a distance comparable to Uranus’ position in the solar system.
Researchers believe PDS 70b has gathering material for around 5 million years and may be nearing the end of its formation phase.
Using the Keck II telescope in Hawaii, scientists examine its atmosphere for carbon monoxide and water, which provide insights into its carbon and oxygen levels, key indicators of planetary origins.
Findings reveal that the planet’s atmosphere contains significantly less carbon and oxygen than expect.
According to Dr Chih-Chun Hsu, postdoctoral researcher at Northwestern University and lead author of the study, in a statement, this discrepancy highlights potential oversimplifications in the widely accept models of planetary formation.
The researchers propose two possible explanations.
One suggests that PDS 70b incorporate most of its carbon and oxygen from solid materials such as ice and dust, which release these elements during evaporation before being integrated into the planet.
Dr Jason Wang, assistant professor at Northwestern University and co-author of the study, point out in a statement that this process can significantly alter the carbon-to-oxygen ratio.
Or, the protoplanetary disk might have undergone recent enrichment in carbon, a scenario support by certain formation models.
Future observations of the second planet in the system, PDS 70c, are expect to provide further data to refine understanding of planetary formation processes.
Scientists emphasise the need to study more systems like this to establish broader insights into planet formation mechanisms.
