Lucas Liuzzo

Lucas Liuzzo
University of California, Berkeley | UCB

Doctor of Philosophy
lukeliuzzo.github.io

About

32
Publications
1,080
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
298
Citations
Introduction
Lucas Liuzzo is a Postdoctoral researcher at the Space Sciences Laboratory. Lucas' research focuses on space and plasma physics. He is currently working on a project that studies Callisto's interaction with the Jovian magnetosphere.

Publications

Publications (32)
Article
Full-text available
The magnetosphere of Jupiter harbors the most extreme fluxes of MeV electrons in the solar system and therefore provides a testbed of choice to understand the origin, transport, acceleration, and loss of energetic electrons in planetary magnetospheres. Along this objective, the Pitch Angle Distribution (PAD) of energetic electrons may reveal signat...
Article
Full-text available
The JUpiter ICy moons Explorer (JUICE) of the European Space Agency will investigate Jupiter and its icy moons Europa, Ganymede, and Callisto, with the aim to better understand the origin and evolution of our Solar System and the emergence of habitable worlds around gas giants. The Particle Environment Package (PEP) on board JUICE is designed to me...
Article
Full-text available
Many moons in the solar system are thought to potentially harbor hidden oceans based on the features observed at their surfaces. However, the magnetic induction signatures measured in the vicinity of these moons provide the most compelling evidence for the presence of a subsurface ocean, specifically for the Jovian moons Europa and Callisto. Interp...
Article
Full-text available
For the entire ion energy range observed at Europa, we calculate spatially resolved maps of the surface sputtering rates of H2O, O2, and H2 from impacts by magnetospheric ions. We use the perturbed electromagnetic fields from a hybrid model of Europa’s plasma interaction, along with a particle‐tracing tool, to calculate the trajectories of magnetos...
Article
Full-text available
A prominent feature of the interaction between a planetary moon and its magnetospheric environment is the formation of a wake cavity in the downstream hemisphere, characterized by a significant decrease of the incident plasma density. Using an analytical model of Triton's sub‐Alfvénic interaction with Neptune's magnetosphere, we demonstrate that th...
Article
In this paper we present ab initio 3D Monte-Carlo simulations of Ganymede’s surface sputtered and sublimated H2O exosphere. As inputs, we include surface water content maps and temperature distribution maps based on Galileo and Very Large Telescope (VLT) observations. For plasma precipitation, we use hybrid model results for thermal H+ and O+, ener...
Article
Full-text available
The tilt between Neptune’s magnetic and rotational axes, along with Triton’s orbital obliquity, causes a strong time variability of the moon’s local electromagnetic environment. To constrain Triton’s interaction with the ambient magnetospheric plasma, we apply a hybrid (kinetic ions, fluid electrons) model including the moon’s ionosphere and induce...
Article
Full-text available
Plain Language Summary Since the Moon lacks a thick atmosphere, both external plasmas and interplanetary micrometeoroids directly interact with the lunar surface. Consequently, the lunar surface builds up a static electric potential that balances all electric currents. NASA's Acceleration, Reconnection, Turbulence, and Electrodynamics of the Moon's...
Article
Full-text available
We develop an analytical model of the Alfvén wings generated by the interaction between a moon's ionosphere and its sub‐Alfvénic magnetospheric environment. Our approach takes into account a realistic representation of the ionospheric Pedersen conductance profile that typically reaches a local minimum above the moon's poles and maximizes along the...
Article
Full-text available
Plain Language Summary Earth's Moon is exposed to a wide range of particle and magnetic field environments during its 29.5‐day orbit. When outside of Earth's magnetosphere, the Moon experiences the rapidly flowing, dense solar wind plasma. However, for a few days each month, the terrestrial magnetosphere shields the Moon from the solar wind; instea...
Article
Full-text available
We combine the electromagnetic fields from a hybrid model with a particle‐tracing code to calculate the time‐varying spatial distribution of magnetospheric ion flux onto the surface of Jupiter’s moon Europa. The electromagnetic fields at Europa are perturbed by the sub‐alfvénic interaction of the moon’s ionosphere and induced dipole with the magnet...
Article
From orbit, the visibility of Titan’s surface is limited to a handful of narrow spectral windows in the near-infrared (near-IR), primarily from the absorption of methane gas. This has limited the ability to identify specific compounds on the surface—to date Titan’s bulk surface composition remains unknown. Further, understanding of the surface comp...
Preprint
From orbit, the visibility of Titan's surface is limited to a handful of narrow spectral windows in the near-infrared (near-IR), primarily from the absorption of methane gas. This has limited the ability to identify specific compounds on the surface -- to date Titan's bulk surface composition remains unknown. Further, understanding of the surface c...
Article
Full-text available
We constrain the diagnostic potential of ion energy spectrograms to identify signatures of water vapor plumes in the thermal plasma environment of Jupiter's moon Europa. For this purpose, we apply a hybrid model of Europa's Alfvénic plasma interaction to calculate the perturbations of the flow and the electromagnetic fields near the moon for variou...
Article
Full-text available
This study examines the bombardment of energetic magnetospheric electrons onto Ganymede as a function of Jovian magnetic latitude. We use the output from a three‐dimensional, hybrid model to constrain features of the electromagnetic environment during the G1, G8, and G28 Galileo encounters when Ganymede was located far above, within, or far below J...
Article
Full-text available
The moon Dione orbits Saturn at 6.2 Saturn radii $R_S$ deep in the Kronian magnetosphere. In‐situ studies of the moon‐magnetosphere interaction processes near Dione were possible with the Cassini/Huygens mission which flew by close to Dione five times at distances between 99 km and 516 km. In addition, Cassini crossed Dione’s L‐shell more than 400...
Article
Full-text available
The goal of our study is to present a systematic modeling framework for the identification of water vapor plumes in plasma and magnetic field data from spacecraft flybys of Europa. In particular, we determine the degree to which different plume configurations can be obscured by the interaction of Jupiter's magnetospheric plasma with Europa's induce...
Article
Full-text available
We model the dynamics of energetic magnetospheric ions in the perturbed electromagnetic fields near Jupiter's moon Europa. The inhomogeneities in the fields near Europa are generated by the induced dipole field from the moon's subsurface ocean as well as the Alfvénic plasma interaction with its ionosphere and induced field. Inhomogeneities in Europ...
Article
We examine the dynamics of energetic magnetospheric electrons exposed to the highly perturbed and asymmetric plasma environment of Jupiter’s moon Callisto. The interaction of the (nearly) corotating magnetospheric plasma with Callisto’s ionosphere and induced dipole locally generates intense electromagnetic pileup and draping signatures which vary...
Article
Full-text available
Plain Language Summary Observations by the Hubble Space Telescope have revealed the presence of water vapor plumes at Jupiter's icy moon Europa. However, in contrast to the Enceladus plume, the occurrence of plumes at Europa seems to be a transient phenomenon. The mechanism governing the times and locations of these emissions is still unknown. In a...
Article
Using hybrid simulations and analytical calculations, we investigate the observable magnetic perturbations during the 12 planned Callisto flybys of the JUpiter ICy moons Explorer mission. During four of these encounters, Callisto will be embedded within Jupiter's magnetospheric current sheet. In these cases, Callisto's Alfvén wings and ramside magn...
Article
We examine the dynamics of energetic magnetospheric ions in the highly perturbed and asymmetric electromagnetic environment of the Jovian moon Callisto. The Alfvénic interaction of the (nearly) corotating magnetospheric plasma with Callisto's ionosphere and induced dipole generates electromagnetic field perturbations near the moon, the structure of...
Article
Mercury is the closest orbiting planet around the sun and is therefore embedded in an intensive and highly varying solar wind. In-situ data from the MESSENGER spacecraft of the plasma environment near Mercury indicates that a coronal mass ejection (CME) passed the planet on 23 November 2011 over the span of the 12 h MESSENGER orbit. Slavin et al. (...
Article
We apply a hybrid (kinetic ions, fluid electrons) simulation model to study Pluto's plasma environment during the New Horizons encounter on 14 July 2015. We show that Pluto's plasma interaction is dominated by significant north-south asymmetries, driven by large pickup ion gyroradii on the order of 200 Pluto radii. The transition region from the am...
Article
We apply a combination of analytical modeling, hybrid simulations, and data analysis techniques to provide a comprehensive study of magnetometer data from four Galileo flybys of Callisto (C21, C22, C23, C30) that have never been discussed in the literature before. Callisto's distance to the center of Jupiter's magnetospheric current sheet varied co...
Article
We apply a combination of data analysis and hybrid modeling to study Callisto's interaction with Jupiter's magnetosphere during the Galileo C10 flyby on 17 September 1997. This encounter took place while Callisto was located near the center of Jupiter's current sheet. Therefore, induction in Callisto's subsurface ocean and magnetospheric field line...
Article
The interaction between Callisto's atmosphere and ionosphere with the surrounding magnetospheric environment is analyzed by applying a hybrid simulation code, in which the ions are treated as particles and the electrons are treated as a fluid. Callisto is unique among the Galilean satellites in its interaction with the ambient magnetospheric plasma...
Article
This study investigates the processes that lead to the detection of split signatures in ion density during several crossings of the Cassini spacecraft through Titan's mid-range plasma tail (T9, T63, and T75). During each of these flybys, the Cassini Plasma Spectrometer detected Titan's ionospheric ion population twice; i.e., the spacecraft passed t...
Article
Winds in the thermosphere are highly important for transporting mass, momentum, and energy over the globe. In the high latitude region, observations show that ion and neutral motions are strongly coupled when the aurora is present, but the coupling is less evident when there is no aurora. In this study, we investigate the ability of the Global Iono...

Network

Cited By

Projects

Projects (3)
Project
Within the BepiColombo simulation group, multiple simulation codes are used to research the interaction of the solar wind with Mercury's magnetosphere. The different numerical approaches to the solar wind interaction with the magnetosphere of Mercury, MHD, hybrid, and Particle-in-Cell also focus on specialized applications. This study will be the first approach to benchmark multiple simulation codes of the solar wind interaction with Mercury to hereby pre-defined 'standard simulation parameters' to understand the specialized applications for each simulation code. This work is done in the frame of the Young Scientist Working Group of the BepiColombo (ESA/JAXA) mission. Simulations in Hybrid and Other TheorieS (SHOTS).
Project
Study Callisto's interaction with Jupiter's magnetosphere. Constrain properties of Callisto's subsurface ocean. Disentangle signatures of plasma interaction and induction in magnetometer data.
Project
Mercury, is often the first object in our solar system that encounters the effect of Coronal Mass Ejections (CME), with enormous plasma densities, varying magnetic field strength and solar wind velocity as MESSENGER data implies. Our plasma hybrid simulation code A.I.K.E.F. (Adaptive Ion Kinetic Electron Fluid) and our model of Mercury has been already tested thoroughly and found explanations for Mercury's double magnetopause and multiple core layer model in the process. Our goals are: - Further improving our existing models for Mercury - Use multiple parameter sets (derived from MESSENGER data and SUSANOO Solar Wind simulations) to consistently explain CME events and compare hybrid simulation output to MESSENGER data - Understanding the 1D-data of MESSENGER with a self consistent overview of the 3D-situation of Mercury's magnetosphere - Finding the origin of "cusp filaments"