Hubble monitoring reveals a 7.5-hour rotation period and wavelength-dependent brightness changes in young L7.5 companion HD 203030B, interpreted as cloud sedimentation below the water-opacity level.
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Cloud Atlas: Variability in and out of the Water Band in the Planetary-mass HD 203030B Points to Cloud Sedimentation in Low-gravity L Dwarfs
Hubble monitoring reveals a 7.5-hour rotation period and wavelength-dependent brightness changes in young L7.5 companion HD 203030B, interpreted as cloud sedimentation below the water-opacity level.