Sasha Cryan

Tracing the Source of Carbon Oxides on the Large Moons of Uranus

Richard J. Cartwright, Sasha Cryan, Rosario Brunetto, Apolline Leclef et autres

Abstract The Uranian moons Ariel, Umbriel, Titania, and Oberon are enriched in CO 2 mixed with CO, but the origin(s) of these carbon oxides, be they primarily native or radiolytic, remain(s) uncertain. Using data collected by NIRSpec on the James Webb Space …

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Tracing the source of carbon oxides on the large moons of Uranus

Richard J. Cartwright, Sasha Cryan, Rosario Brunetto, Apolline Leclef et autres

The Uranian moons Ariel, Umbriel, Titania, and Oberon are enriched in CO2 mixed with CO, but the origin(s) of these carbon oxides, be they primarily native or radiolytic, remains uncertain. Using data collected by NIRSpec on the James Webb Space Telescope (JWST), …

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Detection, Composition and Distribution of Ices on Outer Solar System Planetesimals by JWST

R. Brunetto, N. Pinilla-Alonso, John Stansberry, Sasha Cryan et autres

Trans-Neptunian objects (TNOs), Centaurs, and Neptune Trojans are relatively pristine remnants of the original Solar System planetesimals and therefore can inform us on planetary formation and evolution processes in the cold regions of our protoplanetary disk. Since 2022, using the James Webb …

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Preserved primordial material detected in a Centaur coma 9 au from the Sun

E. Lilly, Charles Schambeau, R. Brunetto, Sasha Cryan et autres

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Spectral Characterization of the Organic- and Methanol-rich Cliff-type Trans-Neptunian Objects

Lucas McClure, Joshua P. Emery, N. Pinilla-Alonso, Rosario Brunetto et autres

Abstract Trans-Neptunian objects (TNOs) harbor pristine materials from the early solar system. The James Webb Space Telescope offers major insights into the spectral classification of these small bodies. Among the three major spectral classes of TNOs, “cliff” types exhibit steep, red slopes …

Nitrogen-bearing Species on Trans-Neptunian Objects Revealed by JWST/DiSCo-TNOs

Sasha Cryan, R. Brunetto, Aurélie Guilbert-Lepoutre, N. Pinilla-Alonso et autres

Abstract C≡N-bearing species are valuable tracers of nitrogen chemistry in the solar system. Ranging from volatile compounds like HCN and CH 3 CN in cometary comae to refractory CN-bearing organics in some micrometeorites and interplanetary dust particles, these species originate in, or …

3D SR ‐ μXCT analysis for lithology detection: Application to Ryugu sample A0159

Léna Jossé, Zélia Dionnet, Alice Aléon‐Toppani, R. Brunetto et autres

Abstract Extraterrestrial breccia samples are formed through impact‐related processes that combine the fragments of distinct lithologies. As such, they are valuable indicators of the complex formation and evolution history of planetesimals in our solar system. Samples from asteroid (162173) Ryugu, returned to …

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A Descriptive Taxonomic Nomenclature for Intermediate-sized Trans-Neptunian Object Spectra

Bryan J. Holler, R. Brunetto, D. P. Cruikshank, Sasha Cryan et autres

Abstract Trans-Neptunian objects (TNOs), icy remnants of planet formation orbiting beyond Neptune, comprise a dynamically and compositionally diverse population of >5000 known members. An extensive body of literature focuses on the dynamical structure of the trans-Neptunian region. Less information is available on …

The spectral diversity of outer icy bodies revealed by JWST and its link to early Solar System processes

R. Brunetto, N. Pinilla-Alonso, John Stansberry, W. M. Grundy et autres

Introduction:Small bodies in the trans-Neptunian region are key to understanding Solar System formation and evolution. Trans-Neptunian objects (TNOs) are relics of planetary formation in the outer protoplanetary disk, but most of them were later affected by the giant planet instability and the …

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Compositional Characterization of Cliff-Type Trans-Neptunian Objects

Lucas McClure, Joshua P. Emery, N. Pinilla-Alonso, R. Brunetto et autres

Introduction: Trans-Neptunian Objects (TNOs) harbor materials from the early solar nebula (e.g., Gladman et al. 2008; Tegler et al. 2016). Observations from the NIRSpec instrument onboard the James Webb Space Telescope (JWST) included >50 TNOs during Cycle 1 for the large program …

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Nitrogen-bearing species at the surface of TNOs revealed by DiSCo-JWST: a chemical reservoir for nitrogen-rich grains in the inner the Solar System.

Sasha Cryan, R. Brunetto, Aurélie Guilbert-Lepoutre, N. Pinilla-Alonso et autres

IntroductionThe C≡N functional group (hereafter CN) can be incorporated into a diverse range of molecular structures, ranging from simpler cyanides like HCN to semi-refractory salts like NH4+OCN– and larger and more complex polymeric refractory material. In astrophysical settings, CN-bearing compounds form and …

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Spectral Diversity of DiSCo’s TNOs Revealed by JWST: Early Sculpting and Late Irradiation

R. Brunetto, Elsa Hénault, Sasha Cryan, N. Pinilla-Alonso et autres

Abstract The spectral diversity of trans-Neptunian objects (TNOs) is crucial for understanding the processes that led to the formation and evolution of planetesimals in the outer solar system. Using near-IR (NIR) spectra obtained by the James Webb Space Telescope (JWST) as part …