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Dawn and the vesta-hed connection
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Beck, A. W. Raymond, C. A. McCoy, T. Ammannito, E. Russell, C. T. Mittlefehldt, D. W. McSween, H. Y. Marchi, S. DeSanctis, M. C. |
| Copyright Year | 2012 |
| Description | Although it is difficult to explain exactly how eucrites and diogenites are related through simple magmatic processes, their shared oxygen isotopic compositions and the common occurrence of clasts of both lithologies in howardite breccias support derivation from a common parent body. For decades, HED meteorites have been linked to asteroid 4 Vesta, based on spectral similarities [1] and the discovery of a dynamical family (Vestoids) that provides a bridge between Vesta and nearby resonance escape hatches [2]. Although recently derived constraints on the rapidity of HED parent body differentiation, based on measurements of Al-26 in diogenites, have been used to argue against the Vesta-HED connection [3], new thermal evolution models [e.g., 4] appear to be heated and melted fast enough to account for this constraint. Data from the Dawn orbiter strengthen the Vesta - HED linkage and provide new insights into petrogenetic interpretations of these meteorites. |
| File Size | 631947 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120001949 |
| Archival Resource Key | ark:/13960/t1tf4sn30 |
| Language | English |
| Publisher Date | 2012-01-02 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Temperature Distribution Vesta Asteroid Meteorites Lithology Asteroids Meteoritic Composition Hatches Spectra Aluminum Isotopes Breccia Achondrites Isotopic Labeling Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
