We present observations of the 1.35+/-0.07 Earth-radius planet L 98-59 c using Wide Field Camera~3 on the Hubble Space Telescope. L 98-59 is a nearby (10.6 pc), bright (H=7.4 mag), […]
Atmospheres, Climate, Weather
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
YunMa: Enabling Spectral Retrievals of Exoplanetary Clouds
In this paper, we present YunMa, a model which enables the study of cloud microphysics and radiative properties in exoplanetary atmospheres.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
A JWST NIRSpec Phase Curve for WASP-121b: Dayside Emission Strongest Eastward of the Substellar Point and Nightside Conditions Conducive to Cloud Formation
We present the first exoplanet phase curve measurement made with the JWST NIRSpec instrument, highlighting the exceptional stability of this newly-commissioned observatory for exoplanet climate studies.
Posted inAstrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Habitable Zones, Press Release
Earth’s Geological Thermostat: How Temperature-dependent Silicate Weathering Helps Steer The Planet’s Climate
The process of minerals in rocks being chemically broken down, or weathered – which plays a crucial role in controlling Earth’s climate – removes less carbon dioxide (CO2) if temperatures […]
Posted inAtmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Neptune, Status Report
Atmospheric Chemistry of Secondary and Hybrid Atmospheres of Super Earths and Sub-Neptunes
The atmospheres of small exoplanets likely derive from a combination of geochemical outgassing and primordial gases left over from formation.
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Press Release
Climate And Atmospheric Models Of Rocky Planets: Habitability And Observational Properties
The quest for atmospheric spectral signatures that may witness biological activity in exoplanets is focused on rocky planets.
Posted inAtmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Effect Of Multiple Scattering On The Transmission Spectra And The Polarization Phase Curves For Earth-like Exoplanets
It is the most appropriate time to characterize the Earth-like exoplanets in order to detect biosignature beyond the Earth because such exoplanets will be the prime targets of big-budget missions […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Neural Posterior Estimation For Exoplanetary Atmospheric Retrieval
Retrieving the physical parameters from spectroscopic observations of exoplanets is key to understanding their atmospheric properties.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Characterization Of A Set Of Small Planets With TESS And CHEOPS And An Analysis Of Photometric Performance
The radius valley carries implications for how the atmospheres of small planets form and evolve, but this feature is only visible with highly-precise characterizations of many small planets.
Posted inAtmospheres, Climate, Weather, Habitable Zones, Space Weather & Heliophysics, Status Report
Periodicities Of Solar Activity And Solar Radiation Derived From Observations And Their Links With The Terrestrial Environment
Solar magnetic activity is expressed via variations of sunspots and active regions varying on different timescales. The most accepted is an 11-year period supposedly induced by the electromagnetic solar dynamo […]