229 citations · 794 across the 40 of their papers we have counts for
36 papers · 1 filter
Callisto from JWST: CO2-rich terrain on the leading hemisphere and global patterns of H2O ice
Maria Camarca, Katherine de Kleer, Richard J. Cartwright +5
We present maps of H2O, CO2, and a 4.57 um spectral feature across Callisto's surface observed using the James Webb Space Telescope (JWST). H2O ice was mapped by measuring band par…
Revealing Io's Surface using JWST-NIRISS Aperture Masking Interferometry and Neural Network Deconvolution
J. Sanchez-Bermudez, I. dePater, A. Conrad +6
Io is one of Jupiter's largest moons and the most volcanically active body in the Solar System. Its very active surface has hot spots produced by volcanic eruptions popping up at s…
Detection of New Auroral Emissions at Io and Implications for Its Interaction with the Plasma Torus
Zachariah Milby, Katherine de Kleer, Carl Schmidt
We observed Io's optical aurora in eclipse on six nights between 2022 and 2024 using Keck I/HIRES. Spectra revealed 13 new auroral emissions not identified previously, tripling the…
The Atmosphere of Titan in Late Northern Summer from JWST and Keck Observations
Conor A. Nixon, Bruno Bézard, Thomas Cornet +42
Saturn's moon Titan undergoes a long annual cycle of 29.45 Earth years. Titan's northern winter and spring were investigated in detail by the Cassini-Huygens spacecraft (2004-2017)…
Io's SO2 and NaCl Wind Fields From ALMA
Alexander E. Thelen, Katherine de Kleer, Martin A. Cordiner +3
We present spatially resolved measurements of SO and NaCl winds on Io at several unique points in its orbit: before and after eclipse, and at maximum eastern and western elonga…
The Thermal Structure and Composition of Jupiter's Great Red Spot From JWST/MIRI
Jake Harkett, Leigh N. Fletcher, Oliver R. T. King +15
Jupiter's Great Red Spot (GRS) was mapped by the James Webb Space Telescope (JWST)/Mid-Infrared Instrument (4.9-27.9 micron) in July and August 2022. These observations took place…
Redshifted Sodium Transient near Exoplanet Transit
Apurva V. Oza, Julia V. Seidel, H. Jens Hoeijmakers +21
Neutral sodium (Na I) is an alkali metal with a favorable absorption cross section such that tenuous gases are easily illuminated at select transiting exoplanet systems. We examine…
Short-Timescale Spatial Variability of Ganymede's Optical Aurora
Zachariah Milby, Katherine de Kleer, Carl Schmidt +1
Ganymede's aurora are the product of complex interactions between its intrinsic magnetosphere and the surrounding Jovian plasma environment and can be used to derive both atmospher…
Europa's HO: Temperature Insensitivity and a Correlation with CO
Peiyu Wu, Samantha K. Trumbo, Michael E. Brown +1
HO is part of Europa's water-ice radiolytic cycle and a potential source of oxidants to Europa's subsurface ocean. However, factors controlling the concentration of this cr…
LBT SHARK-VIS Observes a Major Resurfacing Event on Io
Al Conrad, Fernando Pedichini, Gianluca Li Causi +18
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes on Io's surface have been monitored from both spacecraft and ground-based telescopes. Here,…
Isotopic evidence of long-lived volcanism on Io
Katherine de Kleer, Ery C. Hughes, Francis Nimmo +4
Jupiter's moon Io hosts extensive volcanism driven by tidal heating. The isotopic composition of Io's inventory of volatile elements, including sulfur and chlorine, reflects its ou…
Detection of a 2.85 micrometer Feature on 5 Spinel-rich Asteroids from JWST
Jonathan Gomez Barrientos, Katherine de Kleer, Bethany L. Ehlmann +2
Ground-based observations of `Barbarian' L-type asteroids at 1 to 2.5-m indicate that their near-infrared spectra are dominated by the mineral spinel, which has been attributed…
Observations of Titan's Stratosphere During Northern Summer: Temperatures, CH3CN and CH3D Abundances
Alexander E. Thelen, Conor A. Nixon, Martin A. Cordiner +11
Titan's atmospheric composition and dynamical state have previously been studied over numerous epochs by both ground- and space-based facilities. However, stratospheric measurement…
Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Planetary and Cometary Atmospheres
Martin A. Cordiner, Alexander E. Thelen, Thibault Cavalié +26
The study of planets and small bodies within our Solar System is fundamental for understanding the formation and evolution the Earth and other planets. Compositional and meteorolog…
Mass supply from Io to Jupiter's magnetosphere
L. Roth, A. Blöcker, K. de Kleer +24
Since the Voyager mission flybys in 1979, we have known the moon Io to be both volcanically active and the main source of plasma in the vast magnetosphere of Jupiter. Material lost…
Subsurface Thermophysical Properties of Europa's Leading and Trailing Hemispheres as Revealed by ALM
A. E. Thelen, K. de Kleer, M. Camarca +4
We present best-fit values of porosity -- and the corresponding effective thermal inertiae -- determined from three different depths in Europa's near-subsurface (~1-20 cm). The por…
Revealing Callisto's carbon-rich surface and CO2 atmosphere with JWST
Richard J. Cartwright, Geronimo L. Villanueva, Bryan J. Holler +18
We analyzed spectral cubes of Callisto's leading and trailing hemispheres, collected with the NIRSpec Integrated Field Unit (G395H) on the James Webb Space Telescope. These spatial…
Composition and thermal properties of Ganymede's surface from JWST/NIRSpec and MIRI observations
D. Bockelee-Morvan, E. Lellouch, O. Poch +21
JWST NIRSpec IFU (2.9-5.3 mu) and MIRI MRS (4.9-28.5 mu) observations were performed on both the leading and trailing hemispheres of Ganymede with a spectral resolution of ~2700. R…
Thermal properties of the leading hemisphere of Callisto inferred from ALMA observations
Maria Camarca, Katherine de Kleer, Bryan Butler +5
We present a thermal observation of Callisto's leading hemisphere obtained using the Atacama Large Millimeter/submillimeter Array (ALMA) at 0.87 mm (343 GHz). The angular resolutio…
Evolution of Neptune at Near-Infrared Wavelengths from 1994 through 2022
Erandi Chavez, Imke de Pater, Erin Redwing +15
Using archival near-infrared observations from the Keck and Lick Observatories and the Hubble Space Telescope, we document the evolution of Neptune's cloud activity from 1994 to 20…
Drift Rates of Major Neptunian Features between 2018 and 2021
Erandi Chavez, Erin Redwing, Imke de Pater +13
Using near-infrared observations of Neptune from the Keck and Lick Observatories, and the Hubble Space Telescope in combination with amateur datasets, we calculated the drift rates…
The two rings of (50000) Quaoar
C. L. Pereira, B. Sicardy, B. E. Morgado +66
Quaoar is a classical Trans-Neptunian Object (TNO) with an area equivalent diameter of 1,100 km and an orbital semi-major axis of 43.3 astronomical units. Based on stellar occultat…
Io's Optical Aurorae in Jupiter's Shadow
Carl Schmidt, Mikhail Sharov, Katherine de Kleer +13
Decline and recovery timescales surrounding eclipse are indicative of the controlling physical processes in Io's atmosphere. Recent studies have established that the majority of Io…
The Optical Aurorae of Europa, Ganymede and Callisto
Katherine de Kleer, Zachariah Milby, Carl Schmidt +2
The tenuous atmospheres of the Galilean satellites are sourced from their surfaces and produced by a combination of plasma-surface interactions and thermal processes. Though thin,…