Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 50805.0, MPI für Astronomie / Publikationen_mpia
Detection of Carbonates in Dust Shells around Evolved Stars
Authors:Kemper, F.; Jäger, C.; Waters, L. B. F. M.; Henning, Th.; Molster, F. J.; Barlow, M. J.; Lim, T.; de Koter, A.
Date of Publication (YYYY-MM-DD):2002
Title of Journal:Nature
Volume:415
Start Page:295
End Page:297
Review Status:not specified
Audience:Not Specified
Abstract / Description:Carbonates on large Solar System bodies like Earth and Mars (the latter represented by the meteorite ALH84001) form through the weathering of silicates in a watery (CO3)2- solution. The presence of carbonates in interplanetary dust particles and asteroids (again, represented by meteorites) is not completely understood, but has been attributed to aqueous alteration on a large parent body, which was subsequently shattered into smaller pieces. Despite efforts, the presence of carbonates outside the Solar System has hitherto not been established. Here we report the discovery of the carbonates calcite and dolomite in the dust shells of evolved stars, where the conditions are too primitive for the formation of large parent bodies with liquid water. These carbonates, therefore, are not formed by aqueous alteration, but perhaps through processes on the surfaces of dust or ice grains or gas phase condensation. The presence of carbonates which did not form by aqueous alteration suggests that some of the carbonates found in Solar System bodies no longer provide direct evidence that liquid water was present on large parent bodies early in the history of the Solar System.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands), AB(Astronomical Institute ``Anton Pannekoek'', University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands), AC(University of Jena, Astrophysical Institute and University Observatory (AIU), Schillergässchen 3, D-07745 Jena, Germany), AD(University of Jena, Astrophysical Institute and University Observatory (AIU), Schillergässchen 3, D-07745 Jena, Germany), AE(Astronomical Institute ``Anton Pannekoek'', University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands), AF(Astronomical Institute ``Anton Pannekoek'', University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands), AG(Astronomical Institute ``Anton Pannekoek'', University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands), AH(University of Jena, Astrophysical Institute and University Observatory (AIU), Schillergässchen 3, D-07745 Jena, Germany)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.