Space and astronomy news
This image is a Hubble image of the inner regions in the Orion Nebula, with a JWST image of a protoplanetary disk named d203-506. The disk is close enough to the massive Trapezium Cluster stars that their UV radiation is shaping the planet-forming process in the disk. Image Credit: NASA/STSCI/RICE UNIV./C.O'DELL ET AL / O. BERNÉ, I. SCHROTTER, PDRS4ALL
New research examines how the powerful UV radiation from massive stars affects planet formation in disks. The research article is “” It’s published in the journal Science, and the lead author is Olivier Berne from the Institute for Research in Astrophysics and Planetology, University of Toulouse, France.
“Most low-mass stars form in stellar clusters that also contain massive stars, which are sources of far ultraviolet radiation,” the researchers explain. “Theoretical models predict that this FUV radiation produces photodissociation regions on the surfaces of protoplanetary disks around low-mass stars, which affects planet formation within the disks.” The PDRs can span several hundred astronomical units .
The disk in the image, d203-506, is being bombarded by intense FUV radiation from the massive Trapezium stars. The FUV radiation is dispersing matter in the disk, inhibiting planet formation. According to the research, it’s impossible for a Jupiter-mass planet to form in this disk because the radiation is stripping matter away.
The powerful FUV radiation dissociates molecular hydrogen into atomic hydrogen. The PDR marks the transition between molecular and atomic hydrogen. As the hydrogen is converted into atomic hydrogen, it becomes warmer, and the heating helps drive the photoevaporation of the hydrogen.
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