Science, Space and Technology News 2024
This is an artist’s concept of the exoplanet GJ 9827d, the smallest exoplanet where water vapor has been detected in the atmosphere. The planet could be an example of potential planets with water-rich atmospheres elsewhere in our galaxy. With only about twice Earth’s diameter, the planet orbits the red dwarf star GJ 9827. Two inner planets in the system are on the left. The background stars are plotted as they would be seen to the unaided eye looking back toward our Sun.
. These observations were part of a broader program led by Brande’s adviser, Ian Crossfield, associate professor of physics & astronomy at KU, to observe the atmospheres of Neptune-sized exoplanets. “The goal is to explore the physical explanations behind the distinct appearances of these planets,” Brande said.
According to Brande, when these aerosols are present high in the atmosphere, there’s no clear path for light to filter through. Brande and his co-authors approached their analysis differently than previous efforts by focusing on determining the physical parameters of the small-Neptune atmospheres. In contrast, previous analyses often involved fitting a single model spectrum to observations.
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