Search Results - "LILLIS, Robert J."

A New Model of the Crustal Magnetic Field of Mars Using MGS and MAVEN by Langlais, Benoit, Thébault, Erwan, Houliez, Aymeric, Purucker, Michael E., Lillis, Robert J.

“…While devoid of an active magnetic dynamo field today, Mars possesses a remanent magnetic field that may reach several thousand nanoteslas locally. The exact…”
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Nightside electron precipitation at Mars: Geographic variability and dependence on solar wind conditions by Lillis, Robert J., Brain, David A.

“…Electron precipitation is usually the dominant source of energy input to the nightside Martian atmosphere, with consequences for ionospheric densities,…”
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Time history of the Martian dynamo from crater magnetic field analysis by Lillis, Robert J., Robbins, Stuart, Manga, Michael, Halekas, Jasper S., Frey, Herbert V.

“…Large impacts simultaneously reset both the surface age and the magnetization of the entire depth of crust over areas comparable to the final size of the…”
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Photochemical escape of oxygen from Mars: First results from MAVEN in situ data by Lillis, Robert J., Deighan, Justin, Fox, Jane L., Bougher, Stephen W., Lee, Yuni, Combi, Michael R., Cravens, Thomas E., Rahmati, Ali, Mahaffy, Paul R., Benna, Mehdi, Elrod, Meredith K., McFadden, James P., Ergun, Robert. E., Andersson, Laila, Fowler, Christopher M., Jakosky, Bruce M., Thiemann, Ed, Eparvier, Frank, Halekas, Jasper S., Leblanc, François, Chaufray, Jean‐Yves

“…Photochemical escape of atomic oxygen is thought to be one of the dominant channels for Martian atmospheric loss today and played a potentially major role in…”
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Ionizing Electrons on the Martian Nightside: Structure and Variability by Lillis, Robert J., Mitchell, David L., Steckiewicz, Morgane, Brain, David, Xu, Shaosui, Weber, Tristan, Halekas, Jasper, Connerney, Jack, Espley, Jared, Benna, Mehdi, Elrod, Meredith, Thiemann, Edward, Eparvier, Frank

“…The precipitation of suprathermal electrons is the dominant external source of energy deposition and ionization in the Martian nightside upper atmosphere and…”
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Three-dimensional structure of the Martian nightside ionosphere: Predicted rates of impact ionization from Mars Global Surveyor magnetometer and electron reflectometer measurements of precipitating electrons by Lillis, Robert J., Fillingim, Matthew O., Brain, David A.

“…The nightside ionosphere of Mars is known to be highly variable: electron densities are below detection thresholds in certain regions and are almost comparable…”
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Autocorrelation Study of Solar Wind Plasma and IMF Properties as Measured by the MAVEN Spacecraft by Marquette, Melissa L., Lillis, Robert J., Halekas, J. S., Luhmann, J. G., Gruesbeck, J. R., Espley, J. R.

“…It has long been a goal of the heliophysics community to understand solar wind variability at heliocentric distances other than 1 AU, especially at ∼1.5 AU due…”
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Discrete aurora and the nightside ionosphere of Mars: an EMM–MEX conjunction of FUV imaging, ionospheric radar sounding, and suprathermal electron measurements by Harada, Yuki, Fujiwara, Yuka, Lillis, Robert J., Deighan, Justin, Nakagawa, Hiromu, Sánchez-Cano, Beatriz, Lester, Mark, Futaana, Yoshifumi, Holmström, Mats, Frahm, Rudy A.

“…Since 2021, a new surge in discrete aurora detections at Mars has been observed by the Emirates Mars Ultraviolet Spectrometer (EMUS) onboard the Emirates Mars…”
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A serverless computing architecture for Martian aurora detection with the Emirates Mars Mission by Pacios, David, Vázquez-Poletti, José Luis, Dhuri, Dattaraj B., Atri, Dimitra, Moreno-Vozmediano, Rafael, Lillis, Robert J., Schetakis, Nikolaos, Gómez-Sanz, Jorge, Iorio, Alessio Di, Vázquez, Luis

“…Remote sensing technologies are experiencing a surge in adoption for monitoring Earth’s environment, demanding more efficient and scalable methods for image…”
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The MAVEN Solar Energetic Particle Investigation by Larson, Davin E., Lillis, Robert J., Lee, Christina O., Dunn, Patrick A., Hatch, Kenneth, Robinson, Miles, Glaser, David, Chen, Jianxin, Curtis, David, Tiu, Christopher, Lin, Robert P., Luhmann, Janet G., Jakosky, Bruce M.

“…The MAVEN Solar Energetic Particle (SEP) instrument is designed to measure the energetic charged particle input to the Martian atmosphere. SEP consists of two…”
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Open Magnetic Fields in the Martian Magnetosphere Revealing Dipole-like Intrinsic Magnetic Fields at Mars by Xu, Shaosui, Luhmann, Janet G., Mitchell, David L., Weber, Tristan, Brain, David A., Ma, Yingjuan, Curry, Shannon M., DiBraccio, Gina A., Halekas, Jasper, Ruhunusiri, Suranga, Mazelle, Christian, Lillis, Robert J., Langlais, Benoit

“…Abstract Mars’s magnetosphere is hybrid, having contributions from both an induced magnetosphere like Venus and the localized crustal magnetic fields. However,…”
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The first in situ electron temperature and density measurements of the Martian nightside ionosphere by Fowler, C. M., Andersson, L., Ergun, R. E., Morooka, M., Delory, G., Andrews, D. J., Lillis, Robert J., McEnulty, T., Weber, T. D., Chamandy, T. M., Eriksson, A. I., Mitchell, D. L., Mazelle, C., Jakosky, B. M.

“…The first in situ nightside electron density and temperature profiles at Mars are presented as functions of altitude and local time (LT) from the Langmuir…”
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Magnetic Topology Response to the 2003 Halloween ICME Event at Mars by Xu, Shaosui, Curry, Shannon M., Mitchell, David L., Luhmann, Janet G., Lillis, Robert J., Dong, Chuanfei

“…Understanding how the Mars plasma environment responds to space weather events provides insights into the early Sun‐Mars interaction and helps constrain the…”
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Nightside ionosphere of Mars: Modeling the effects of crustal magnetic fields and electron pitch angle distributions on electron impact ionization by Lillis, Robert J., Fillingim, Matthew O., Peticolas, Laura M., Brain, David A., Lin, Robert P., Bougher, Stephen W.

“…The night side ionosphere of Mars is known to be highly variable: essentially nonexistent in certain geographic locations, while occasionally nearly as strong…”
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Mercury's surface magnetic field determined from proton-reflection magnetometry by Winslow, Reka M., Johnson, Catherine L., Anderson, Brian J., Gershman, Daniel J., Raines, Jim M., Lillis, Robert J., Korth, Haje, Slavin, James A., Solomon, Sean C., Zurbuchen, Thomas H., Zuber, Maria T.

“…Solar wind protons observed by the MESSENGER spacecraft in orbit about Mercury exhibit signatures of precipitation loss to Mercury's surface. We apply…”
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Electron impact ionization in the Martian atmosphere: Interplay between scattering and crustal magnetic field effects by Lillis, Robert J., Fang, Xiaohua

“…Precipitating electrons are typically the dominant source of energy input into Mars' nighttime upper atmosphere, with consequences for atmospheric and…”
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Constraining the Date of the Martian Dynamo Shutdown by Means of Crater Magnetization Signatures by Vervelidou, Foteini, Lesur, Vincent, Grott, Matthias, Morschhauser, Achim, Lillis, Robert J.

“…Mars is believed to have possessed a dynamo that ceased operating approximately 4 Ga ago, although the exact time is still under debate. The scope of this…”
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Shadowing and anisotropy of solar energetic ions at Mars measured by MAVEN during the March 2015 solar storm by Lillis, Robert J., Lee, Christina O., Larson, Davin, Luhmann, Janet G., Halekas, Jasper S., Connerney, Jack E. P., Jakosky, Bruce M.

“…The Solar Energetic Particle (SEP) Instrument on the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft is meant to characterize the variability of SEP…”
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Electrodynamics of the Martian dynamo region near magnetic cusps and loops by Riousset, Jeremy A., Paty, Carol S., Lillis, Robert J., Fillingim, Matthew O., England, Scott L., Withers, Paul G., Hale, John P. M.

“…Strong and inhomogeneous remanent magnetization on Mars results in a complex pattern of crustal magnetic fields. The geometry and topology of these fields lead…”
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Hot oxygen corona at Mars and the photochemical escape of oxygen: Improved description of the thermosphere, ionosphere, and exosphere by Lee, Yuni, Combi, Michael R., Tenishev, Valeriy, Bougher, Stephen W., Lillis, Robert J.

“…The Mars Adaptive Mesh Particle Simulator model is coupled with the Mars Global Ionosphere Thermosphere Model for the first time to provide an improved…”
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