A bimodal distribution of haze in Pluto's atmosphere
arXiv:2201.04392 · doi:10.1038/s41467-021-27811-6
Abstract
Pluto, Titan, and Triton make up a unique class of solar system bodies, with icy surfaces and chemically reducing atmospheres rich in organic photochemistry and haze formation. Hazes play important roles in these atmospheres, with physical and chemical processes highly dependent on particle sizes, but the haze size distribution in reducing atmospheres is currently poorly understood. Here we report observational evidence that Pluto's haze particles are bimodally distributed, which successfully reproduces the full phase scattering observations from New Horizons. Combined with previous simulations of Titan's haze, this result suggests that haze particles in reducing atmospheres undergo rapid shape change near pressure levels ~0.5Pa and favors a photochemical rather than a dynamical origin for the formation of Titan's detached haze. It also demonstrates that both oxidizing and reducing atmospheres can produce multi-modal hazes, and encourages reanalysis of observations of hazes on Titan and Triton.
arXiv commentPublished in Nature Communications, 26 pages, 12 figures
References in corpus (20)
- emcee: The MCMC Hammer
- HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
- A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
- The Pluto system: Initial results from its exploration by New Horizons
- The Atmosphere of Pluto as Observed by New Horizons
- Ralph: A Visible/Infrared Imager for the New Horizons Pluto/Kuiper Belt Mission
- Long-Range Reconnaissance Imager on New Horizons
- Detection of CO and HCN in Pluto's atmosphere with ALMA
- ALICE: The Ultraviolet Imaging Spectrograph aboard the New Horizons Pluto-Kuiper Belt Mission
- Mean radius and shape of Pluto and Charon from New Horizons images
- Structure and Composition of Pluto's atmosphere from the New Horizons Solar Ultraviolet Occultation
- The Mid-Infrared Instrument for the James Webb Space Telescope, IX: Predicted Sensitivity
- Bimodal Distribution of Sulfuric Acid Aerosols in the Upper Haze of Venus
- Haze in Pluto's Atmosphere
- Constraints on the Microphysics of Pluto's Photochemical Haze from New Horizons Observations
- The nitrogen cycles on Pluto over seasonal and astronomical timescales
- Pluto's Haze as a Surface Material
- The seasonal cycle of Titan's detached haze
- Modeling Pluto's Minimum Pressure: Implications for Haze Production
- Haze Formation on Triton