Detection of local H 2 O exposed at the surface of Ceres

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Hydrogen bonding in solids correlation of spectroscopic and crystallographic data

A. Novak (1974)

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The temperature-dependent near-infrared absorption spectrum of hexagonal H2O ice

W. M. Grundy, B. Schmitt (1998)

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Differentiation of the asteroid Ceres as revealed by its shape.

P Thomas, J Parker, L A McFadden … (2005)

The accretion of bodies in the asteroid belt was halted nearly 4.6 billion years ago by the gravitational influence of the newly formed giant planet Jupiter. The asteroid belt therefore preserves a record of both this earliest epoch of Solar System formation and variation of conditions within the solar nebula. Spectral features in reflected sunlight indicate that some asteroids have experienced sufficient thermal evolution to differentiate into layered structures. The second most massive asteroid--4 Vesta--has differentiated to a crust, mantle and core. 1 Ceres, the largest and most massive asteroid, has in contrast been presumed to be homogeneous, in part because of its low density, low albedo and relatively featureless visible reflectance spectrum, similar to carbonaceous meteorites that have suffered minimal thermal processing. Here we show that Ceres has a shape and smoothness indicative of a gravitationally relaxed object. Its shape is significantly less flattened than that expected for a homogeneous object, but is consistent with a central mass concentration indicative of differentiation. Possible interior configurations include water-ice-rich mantles over a rocky core.

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Author and article information

Journal

Title: Science

Abbreviated Title: Science

Publisher: American Association for the Advancement of Science (AAAS)

ISSN (Print): 0036-8075

ISSN (Electronic): 1095-9203

Publication date Created: September 01 2016

Publication date (Print): September 02 2016

Volume: 353

Issue: 6303

Page: aaf3010

Article

DOI: 10.1126/science.aaf3010

PubMed ID: 27701085

SO-VID: 89896e95-6d90-485e-bd86-6a4886392533

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