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- W3211645066 endingPage "26" @default.
- W3211645066 startingPage "26" @default.
- W3211645066 abstract "Brown dwarfs are essential targets for understanding planetary and sub-stellar atmospheres across a wide range of thermal and chemical conditions. As surveys continue to probe ever deeper, and as observing capabilities continue to improve, the number of known Y dwarfs -- the coldest class of sub-stellar objects, with effective temperatures below about 600 K -- is rapidly growing. Critically, this class of ultra-cool objects has atmospheric conditions that overlap with Solar System worlds and, as a result, tools and ideas developed from studying Earth, Jupiter, Saturn and other nearby worlds are well-suited for application to sub-stellar atmospheres. To that end, we developed a one-dimensional (vertical) atmospheric structure model for ultra-cool objects that includes moist adiabatic convection, as this is an important process for many Solar System planets. Application of this model across a range of effective temperatures (350, 300, 250, 200 K), metallicities ([M/H] of 0.0, 0.5, 0.7, 1.5), and gravities (log $g$ of 4.0, 4.5, 4.7, 5.0) demonstrates strong impacts of water latent heat release on simulated temperature-pressure profiles. At the highest metallicities, water vapor mixing ratios reach an Earth-like 3%, with associated major alterations to the thermal structure in the atmospheric regions where water condenses. Spectroscopic and photometric signatures of metallicity and moist convection should be readily detectable at near- and mid-infrared wavelengths, especially with James Webb Space Telescope observations, and can help indicate the formation history of an object." @default.
- W3211645066 created "2021-11-22" @default.
- W3211645066 creator A5002280175 @default.
- W3211645066 creator A5014928125 @default.
- W3211645066 creator A5030655687 @default.
- W3211645066 creator A5050551935 @default.
- W3211645066 creator A5051408424 @default.
- W3211645066 creator A5075668364 @default.
- W3211645066 date "2021-11-01" @default.
- W3211645066 modified "2023-10-01" @default.
- W3211645066 title "Impact of Water-latent Heat on the Thermal Structure of Ultra-cool Objects: Brown Dwarfs and Free-floating Planets" @default.
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- W3211645066 doi "https://doi.org/10.3847/1538-4357/ac1e90" @default.
- W3211645066 hasPublicationYear "2021" @default.