James Webb spots water vapor in rocky planet-forming disk
on the James Webb Space Telescope sniffed water vapor within PDS 70's inner protoplanetary disk at distances less than 99 million miles from the star.The next step is trying to figure out the source of the water vapor and what form it is in. The academics believe water molecules could be coalescing directly from atoms combining in the disk or that icy grains from the colder outer edge moved past the gap and made their way toward the hot inner region, where they sublimated to form a gas.
"We find a relatively high amount of small dust grains. Combined with our detection of water vapor, the inner disk is a very exciting place," said the aptly named Rens Waters, co-author of this month's study, and an astrophysics professor at Radboud University in the Netherlands. The academics also want to understand how water vapor can survive at distances so close to the star when its ultraviolet radiation should break the molecules apart. One possibility is that they are shrouded in a cloud of dust, and boffins will study the system in more detail with Webb's
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