Search Results - "Walsh, K.J"
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Building Terrestrial Planets
Published in Annual review of earth and planetary sciences (01-01-2012)“…This article reviews our current understanding of terrestrial planet formation. The focus is on computer simulations of the dynamical aspects of the accretion…”
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Rotational states and shapes of Ryugu and Bennu: Implications for interior structure and strength
Published in Planetary and space science (01-09-2021)“…Images of asteroids (162173) Ryugu and (101955) Bennu acquired by the Hayabusa2 and OSIRIS-REx missions, respectively, reveal rocky worlds covered in rubble…”
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Portrait of the Polana–Eulalia family complex: Surface homogeneity revealed from near-infrared spectroscopy
Published in Icarus (New York, N.Y. 1962) (01-08-2016)“…•Comprehensive collection of NIR spectra of asteroids in the Polana/Eulalia families.•The 63 spectra are red with an average slope of S′ = 0.68 ± 0.68…”
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Visible spectroscopy of the Polana–Eulalia family complex: Spectral homogeneity
Published in Icarus (New York, N.Y. 1962) (01-03-2016)“…•Visible spectra of 65 asteroids members of Polana and Eulalia primitive families.•Spectral analyses show no significant differences among the…”
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Bennu's Surface Lacks Cohesion
Published in American scientist (01-09-2022)Get full text
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Rotational breakup as the origin of small binary asteroids
Published in Nature (10-07-2008)“…Asteroids with satellites are observed throughout the Solar System, from subkilometre near-Earth asteroid pairs to systems of large and distant bodies in the…”
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Size-based spectrophotometric analysis of the Polana-Eulalia Complex
Published in Icarus (New York, N.Y. 1962) (01-01-2025)“…The Polana-Eulalia Complex (PEC) is an Inner Main Belt, C-complex asteroid population that may be the source of the near-Earth asteroid spacecraft mission…”
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Simulating impact-induced shaking as a triggering mechanism for mass movements on Bennu
Published in Icarus (New York, N.Y. 1962) (01-05-2023)“…Observations of near-Earth asteroid Bennu have revealed a dynamic surface composed of unconsolidated material. The OSIRIS-REx (Origins, Spectral…”
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Regolith migration on asteroid 101955 Bennu inferred from boulder alignment
Published in Planetary and space science (01-05-2023)“…The alignment of elongated-boulder long axes was measured for the surface regolith of asteroid Bennu in order to quantify patterns of regolith fabric that…”
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The geophysical environment of Bennu
Published in Icarus (New York, N.Y. 1962) (01-09-2016)“…•The OSIRIS-REx mission to Asteroid Bennu will achieve an unparalleled investigation of a small, primitive rubble pile asteroid.•The geophysics of these bodies…”
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SPH simulations of high-speed collisions between asteroids and comets
Published in Icarus (New York, N.Y. 1962) (01-09-2022)“…We studied impact processes by means of smoothed-particle hydrodynamics (SPH) simulations. The method was applied to modelling formation of main-belt families…”
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Characterization and implications of a mass movement site in Bennu’s Bralgah Crater
Published in Icarus (New York, N.Y. 1962) (01-06-2024)“…Rubble-pile asteroids such as Bennu and Ryugu have boulder-covered surfaces and latitude-dependent slope distributions, signifying that mass movement of…”
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Internal rubble properties of asteroid (101955) Bennu
Published in Icarus (New York, N.Y. 1962) (01-12-2021)“…Exploration of asteroid (101955) Bennu by the OSIRIS-REx mission has provided an in-depth look at this rubble-pile near-Earth asteroid. In particular, the…”
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Global geologic map of asteroid (101955) Bennu indicates heterogeneous resurfacing in the past 500,000 years
Published in Icarus (New York, N.Y. 1962) (15-07-2022)“…Global geologic maps are useful tools for efficient interpretation of a planetary body, and they provide global context for the diversity and evolution of the…”
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The Morphometry of Impact Craters on Bennu
Published in Geophysical research letters (28-12-2020)“…Bennu is an ~500‐m‐diameter rubble‐pile asteroid that is the target of detailed study by the Origins, Spectral Interpretation, Resource Identification, and…”
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Numerical simulations of granular dynamics: I. Hard-sphere discrete element method and tests
Published in Icarus (New York, N.Y. 1962) (01-03-2011)“…► We present a new numerical method for simulating granular dynamics. ► The technique has application to small-body surface particle motions. ► Our approach is…”
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Numerical simulations of asteroids modelled as gravitational aggregates with cohesion
Published in Planetary and space science (01-02-2009)“…Evidence is mounting that asteroids larger than a few hundred metres in diameter are gravitational aggregates of smaller, cohesive pieces. For example, images…”
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Ridge formation and de-spinning of Iapetus via an impact-generated satellite
Published in Icarus (New York, N.Y. 1962) (01-08-2011)“…We present a scenario for building the equatorial ridge and de-spinning Iapetus through an impact-generated disk and satellite. This impact puts debris into…”
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