Eryn Cangi

A coupled-oscillator model for the formation of planetary rings

R. Gong, Theodore Broeren, Eryn Cangi, Daniel M. Abrams

We study the dichotomy between compact satellite and ring formation in proto-planetary disks. Specifically, we examine the behavior of a model system of $N$ identical particles locked into circular, gravitationally-bound orbits around a central body. We treat interactions as dominated by inter-particle …

A coupled-oscillator model for the formation of planetary rings

R. Gong, Theodore Broeren, Eryn Cangi, Daniel M. Abrams

We study the dichotomy between compact satellite and ring formation in proto-planetary disks. Specifically, we examine the behavior of a model system of $N$ identical particles locked into circular, gravitationally-bound orbits around a central body. We treat interactions as dominated by inter-particle …

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Atmospheric Escape Rates from Mars - If it Orbited an Old M-Dwarf Star

David A. Brain, O. Cohen, T. E. Cravens, Kevin France et autres

Atmospheric escape is an important process that influences the evolution of planetary atmospheres. A variety of physical mechanisms can contribute to escape from an atmosphere, including thermal escape, ion escape, photochemical escape, and sputtering. Here we estimate escape rates via each of …

Atmospheric Escape Rates from Mars - If it Orbited an Old M-Dwarf Star

David A. Brain, Ofer Cohen, T. E. Cravens, Kevin France et autres

Atmospheric escape is an important process that influences the evolution of planetary atmospheres. A variety of physical mechanisms can contribute to escape from an atmosphere, including thermal escape, ion escape, photochemical escape, and sputtering. Here we estimate escape rates via each of …

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The history of Martian water during the Hesperian and Amazonian epochs

B. M. Jakosky, Noora Alsaeed, Eryn Cangi, Michael Chaffin et autres

Evidence points to there having been more surface and near-surface Martian water in the late Hesperian and early Amazonian than there is at present: (i) The measured enrichment in the D/H isotopic ratio suggests that the total amount of H 2 O …

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Constrained estimates of water loss from the martian atmosphere in a coupled TGO/MRO assimilation

James Holmes, Eryn Cangi, Michael Chaffin, Juan José Gómez Alday et autres

The evolution of water on Mars is a major scientific topic that can in part be advanced through the provision of bounded constraints on the rates of water loss. The Mars Atmosphere and Volatile EvolutioN Imaging Ultraviolet Spectrograph instrument continues to monitor …

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The Vulcan Mission to Io: Lessons Learned during the 2022 JPL Planetary Science Summer School

K. G. Hanley, Quincy McKown, Eryn Cangi, Cassandra Sands et autres

Abstract A mission to Jupiter's moon Io, the most volcanically active body in the solar system, was suggested as a priority for the New Frontiers program in the 2013 Planetary Science Decadal Survey. We present a New Frontiers–class mission concept, Vulcan, that …

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Venus water loss is dominated by HCO+ dissociative recombination

Michael Chaffin, Eryn Cangi, B. S. Gregory, R. Yelle et autres

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Venus is losing water faster than previously thought – here’s what that could mean for the early planet’s habitability

Eryn Cangi

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Chapter 3: The Origins and Evolution of Planetary Systems

Micah J. Schaible, Zoe R. Todd, Eryn Cangi, Chester E. Harman et autres

The materials that form the diverse chemicals and structures on Earth-from mountains to oceans and biological organisms-all originated in a universe dominated by hydrogen and helium. Over billions of years, the composition and structure of the galaxies and stars evolved, and the …

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Chapter 1: The Astrobiology Primer 3.0

Micah J. Schaible, Nadia Szeinbaum, G. Ozan Bozdag, Luoth Chou et autres

The Astrobiology Primer 3.0 (ABP3.0) is a concise introduction to the field of astrobiology for students and others who are new to the field of astrobiology. It provides an entry into the broader materials in this supplementary issue of Astrobiology and an …

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Seasonal Enhancement in Upper Atmospheric D/H at Mars Driven by Both Thermospheric Temperature and Mesospheric Water

Eryn Cangi, Michael Chaffin, R. V. Yelle, B. S. Gregory et autres

Abstract The D/H ratio in water on Mars, R water , is 4–6× the Earth ratio, signifying past water loss to space. Recently, measurements have revealed high values of the D/H ratio in hydrogen, R atomic , in the thermosphere during southern …

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