The space telescope James Webb ha observed with a extraordinary detail two distant giant planets in orbit Around a young star similar to the suncall Yses-1: one of them has the Atuner charge Silicati cloudsWhile the other Still in formation And surrounded by a disc of material from which new ones could be born lune. Understand how this planetary system formed has been formedwhich has only 16.7 million yearswill offer information useful on the origin of our solar system and gods planets similar to Jupiteras indicated by the study published in the magazine Nature by a wide international collaboration in which the University of Rome Tor Vergata participates.
The two exoplanets, observed by the telescope of the space agencies of the USA, Europe and Canada, are several times bigger than Jupiter and they orbit far from their star mother: YSES-1 B it is the most internalWhile Yses-1 It is the planet more external and more small.
“When we observed the smallest and most distant partner, YSES 1-Cwe found the signature revealing of the Silicati clouds in the medium infrared, essentially composed of Sand similar particles: it is the sign the absorption of silicates stronger observed so far in a exoplanet“says Evert Nasadkin of the Dublin Trinity College.
“We believe this is linked to the relative youth of the planets: the younger planets have a slightly greater radius and this extended atmosphere could allow the cloud of absorb a greater quantity of light emitted by the planet. Using detailed modeling, we were able to identify there chemical composition of these clouds, as well as details on form and the size from the particles that make them up. “According to the estimates, the particles are large up to 0.1 thousandths of a millimeter and contain iron which could pour on the planet.
The researchers also report the first observation of a Silicati disc around YSES-1 Ba record that feeds the formation of the planet and that could generate lune similar to those observed around Jupiter. So far only three other records of this type have been identified, all around significantly younger objects than YSES-1B: this raises further questions about how this disc can be so long.
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