Explanipedia

Refining Exoplanet Escape Predictions with Molecular-Kinetic Simulations Open

R. Chatterjee, Shane R. Carberry Mogan, R. E. Johnson · 2025

Following seminal studies such as Muñoz’s 2007 work on HD 209458b, which simulated heavy element escape beyond the Roche lobe, one-dimensional hydrocodes have flourished, routinely solving the Euler equations to model transonic outflows ac…

Spatial and Temporal Variability of Surface Oxidants at Europa and Ganymede Open

A. Oza, R. E. Johnson, Carl Schmidt, W. M. Calvin · 2025

We describe physical processes affecting the formation, trapping, and outgassing of molecular oxygen (O2)at Europa and Ganymede. Following Voyager measurements of their ambient plasmas, laboratory data indicated that the observed ions were…

Four decades of HIV antibody screening in the U.S. military: a review of incidence and demographic trends, 1990-2024. Open

Bulbulgul Aumakhan, Angelia A Eick-Cost, Gi‐Taik Oh, Shauna Stahlman, R. E. Johnson · 2025

Despite significant efforts to further reduce HIV incidence, including the introduction and scaling of pre-exposure prophylaxis (PrEP) in 2012, the repeal of the "Don't Ask, Don't Tell" (DADT) policy in 2011, and test-and-treat initiatives…

Diagnosing the Atmosphere of Jupiter's Volcanic Moon Io Using Energetic Neutral Atoms (ENAs) Open

B. H. Mauk, H. T. Smith, R. E. Johnson, V. Dols, F. Bagenal , et al. · 2025

During a Juno spacecraft encounter with Jupiter's volcanic moon Io (30 December 2023), the Jupiter Energetic Particle Detector Instrument (JEDI) observed Energetic Neutral Atoms (ENAs) of >150 keV oxygen and sulfur (O + S) coming from Io's…

The Plasma Proton Environment Within Saturn's F‐G Ring Gap as Observed by the Cassini Plasma Spectrometer Ion Mass Spectrometer During Saturn Orbit Insertion Open

E. C. Sittler, A. K. Woodson, R. E. Johnson, J. F. Cooper, W. L. Tseng , et al. · 2025

We report on the detection of protons and the potential detection of H 2 + between Saturn's F and G rings based on Cassini Plasma Spectrometer (CAPS) Ion Mass Spectrometer (IMS) time‐of‐flight (TOF) composition measurements acquired during…

Thermally Driven Atmospheric Escape: Transition from Diffusion-limited to Drag-off Escape Open

Jack C. Evans, Shane R. Carberry Mogan, R. E. Johnson, Orenthal J. Tucker · 2025

We examine the transition from diffusion-limited to drag-off escape using a direct simulation Monte Carlo (DSMC) model developed to simulate planetary atmospheres, referred to as Harrah. A 1D spherically symmetric DSMC model is used to sim…

Molecular diagnoses and candidate gene identification in the congenital heart disease cohorts of the 100,000 genomes project Open

Verity Hartill, M. Shahjahan Kabir, Sunayna Best, Wasay Mohiuddin Shaikh Qureshi, Stephanie L. Baross , et al. · 2024

Sealing Europa's vents by vapor deposition: An order of magnitude study Open

Stefano Boccelli, Shane R. Carberry Mogan, R. E. Johnson, Orenthal J. Tucker · 2024

Fractures and vents in the ice crust of Europa, exposing the sub-surface ocean or liquid-water inclusions to the vacuum, might be responsible for the generation of water-vapor plumes. During its passage through the ice, the plume vapor is …

Redshifted Sodium Transient near Exoplanet Transit Open

A. Oza, J. V. Seidel, H. J. Hoeijmakers, Athira Unni, Aurora Y. Kesseli , et al. · 2024

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 both the time-averaged and time-series alkali spectral fl…

Redshifted Sodium Transient near Exoplanet Transit Open

A. Oza, J. V. Seidel, H. J. Hoeijmakers, Athira Unni, Aurora Y. Kesseli , et al. · 2024

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 both the time-averaged and time-series alkali spectral flu…

The Composition of Saturn’s Rings Open

Kelly E. Miller, G. Filacchione, Jeffrey N. Cuzzi, P. D. Nicholson, Matthew M. Hedman , et al. · 2024

Radar for Europa Assessment and Sounding: Ocean to Near-Surface (REASON) Open

Donald D. Blankenship, Alina Moussessian, Elaine Chapin, D. A. Young, G. W. Patterson , et al. · 2024

Magnetospheric‐Ionospheric‐Atmospheric Implications From the Juno Flyby of Ganymede Open

J. H. Waite, T. K. Greathouse, Shane R. Carberry Mogan, A. H. Sulaiman, P. W. Valek , et al. · 2024

Juno flew over the northern mid‐latitudes of Ganymede during orbit 34 of the Juno mission, reaching an altitude of 1,053 km (16:56:07.972 UTC) at a sub spacecraft latitude/longitude of 33.66N, 57.5W degrees on 7 June 2021. Between 16:43 an…

Import Constraints Open

Diego Comín, R. E. Johnson, Callum Jones · 2024

During the recovery from the COVID-19 pandemic, international shipping and logistics capacity was strained, limiting the quantity of imports.We investigate the impact of an import constraint on inflation, following an increase in domestic …

The composition of Saturn's rings Open

Kelly E. Miller, G. Filacchione, Jeffrey N. Cuzzi, P. D. Nicholson, Matthew M. Hedman , et al. · 2023

The origin and evolution of Saturn's rings is critical to understanding the Saturnian system as a whole. Here, we discuss the physical and chemical composition of the rings, as a foundation for evolutionary models described in subsequent c…

S49 Hepatocyte growth factor and epidermal growth factor signalling crosstalk is involved in tunneling nanotube formation in A549 human lung adenocarcinoma cells Open

Souvik Banerjee, Griselda Awanis, R. E. Johnson, Stefan Bidula, Derek Warren , et al. · 2023

Non-small cell lung cancer(NSCLC) accounts for 85% of all lung cancer cases and is often associated with mutations in hepatocyte growth factor(HGF) and epidermal growth factor(EGF) expression. Tunneling nanotubes(TNTs) are thin cytoplasmi…

World War II and the Tavurvur Eruptions of 1941–43 Open

R. E. Johnson, Neville Threlfall · 2023

World War II and the TavurvurEruptions of 1941-43 5.1.Monitoring the Volcanoes Dr Stehn's proposal that a volcanological observatory capable of providing early warnings of volcanic eruptions should be established at Rabaul began to take ef…

Callisto's Atmosphere: The Oxygen Enigma Open

Shane R. Carberry Mogan, Lucas Liuzzo, A. R. Poppe, Sven Simon, J. R. Szalay , et al. · 2023

Observations of Callisto's atmosphere have indicated an O 2 component should exist, but the evolution from its initial source to its inferred steady‐state abundance is not well understood. Herein we constrain the production of O 2 via radi…

Data for "Callisto's Atmosphere: The Oxygen Enigma" by Carberry Mogan, et al., 2023 Open

Shane R. Carberry Mogan, Lucas Liuzzo, A. R. Poppe, Sven Simon, J. R. Szalay , et al. · 2023

Data files corresponding to the publication "Callisto’s atmosphere: The oxygen enigma" by Carberry Mogan, et al., 2023. See also doi:10.5281/zenodo.6784734 for additional files and further information.

Data for "Callisto's Atmosphere: The Oxygen Enigma" by Carberry Mogan, et al., 2023 Open

Shane R. Carberry Mogan, Lucas Liuzzo, A. R. Poppe, Sven Simon, J. R. Szalay , et al. · 2023

Data files corresponding to the publication "Callisto’s atmosphere: The oxygen enigma" by Carberry Mogan, et al., 2023. See also doi:10.5281/zenodo.6784734 for additional files and further information.

Supplementary Figures S1-S3 from Generation of a Transgenic Mouse for Colorectal Cancer Research with Intestinal Cre Expression Limited to the Large Intestine Open

Yingben Xue, R. E. Johnson, Marsha DeSmet, Paul W. Snyder, James C. Fleet · 2023

Supplementary Figures S1-S3.

Data from Generation of a Transgenic Mouse for Colorectal Cancer Research with Intestinal Cre Expression Limited to the Large Intestine Open

Yingben Xue, R. E. Johnson, Marsha DeSmet, Paul W. Snyder, James C. Fleet · 2023

Genetically modified mice have been used for colon cancer research, but findings from these models are confounded by expression of cancer in multiple organs. We sought to create a transgenic mouse with Cre recombinase (Cre) expression limi…

Supplementary Figures S1-S3 from Generation of a Transgenic Mouse for Colorectal Cancer Research with Intestinal Cre Expression Limited to the Large Intestine Open

Yingben Xue, R. E. Johnson, Marsha DeSmet, Paul W. Snyder, James C. Fleet · 2023

Supplementary Figures S1-S3.

Supply Chain Constraints and Inflation Open

Diego Comín, R. E. Johnson, Callum Jones · 2023

We develop a multisector, open economy, New Keynesian framework to evaluate how potentially binding capacity constraints, and shocks to them, shape inflation.We show that binding constraints for domestic and foreign producers shift domesti…

Determining the Sputtered Secondary Ion Densities at Phobos and Deimos: A combined computational and experimental study Open

Micah J. Schaible, Liam S. Morrissey, M. Sarantos, R. E. Johnson · 2023

Introduction: Space weathering by ion irradiation is ubiquitous on the surfaces of airless bodies in the Solar System. Sputtering occurs when solar wind (SW) or magnetosphere ions (MI) impact the suraces of bodies in space. Asteroids and m…

How the Juno Ganymede Flyby Has Changed our Understanding of its Aurora and Atmosphere Open

J. H. Waite, T. K. Greathouse, Shane R. Carberry Mogan, R. W. Ebert, J. E. P. Connerney , et al. · 2023

Juno flew within 1053 km of the surface of Ganymede on June 7, 2021. A unique data set of the interaction of its magnetosphere with the magnetosphere of Jupiter was obtained during the flyby. Auroral imaging was carried out by the UVS expe…

Molecular Kinetic Simulations of Transient and Steady Wave Propagation into a Planet’s Exosphere Open

Lucia Tian, R. E. Johnson, Orenthal J. Tucker, A. K. Woodson, Hayley Williamson , et al. · 2023

The vertical propagation of wave energy into a planet’s exosphere, a process that affects atmospheric evolution, is calculated here using 1D molecular kinetic simulations. Effects sensitive to molecular interactions are examined by compari…

Inner southern magnetosphere observation of Mercury via SERENA ion sensors in BepiColombo mission Open

S. Orsini, Anna Milillo, Herbert Lichtenegger, Ali Varsani, S. Barabash , et al. · 2022

Callisto's Atmosphere: First Evidence for H<sub>2</sub> and Constraints on H<sub>2</sub>O Open

Shane R. Carberry Mogan, Orenthal J. Tucker, R. E. Johnson, Lorenz Roth, Juan Alday , et al. · 2022

We explore the parameter space for the contribution to Callisto's H corona observed by the Hubble Space Telescope from sublimated H 2 O and radiolytically produced H 2 using the Direct Simulation Monte Carlo method. The spatial morphology …

Three-sided pyramid wavefront sensor. II. Preliminary demonstration on the new CACTI testbed Open

Lauren Schatz, Johanan L. Codona, Joseph D. Long, Jared R. Males, Weslin Pullen , et al. · 2022

The next generation of giant ground and space telescopes will have the light-collecting power to detect and characterize potentially habitable terrestrial exoplanets using high-contrast imaging for the first time. This will only be achieva…

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