The Open UniversitySkip to content
 

Mid-infrared spectra of differentiated meteorites(achondrites): comparison with astronomical observations of dust in protoplanetary and debris disks

Morlok, Andreas; Koike, Chiyoe; Tomeoka, Kazushige; Mason, Andrew; Lisse, Carey; Anand, Mahesh and Grady, Monica (2012). Mid-infrared spectra of differentiated meteorites(achondrites): comparison with astronomical observations of dust in protoplanetary and debris disks. Icarus, 219(1) pp. 48–56.

Full text available as:
Full text not publicly available
Due to copyright restrictions, this file is not available for public download
Click here to request a copy from the OU Author.
URL: http://www.sciencedirect.com/science/article/pii/S...
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/j.icarus.2012.02.018
Google Scholar: Look up in Google Scholar

Abstract

Mid-infrared (5–25 μm) transmission/absorption spectra of differentiated meteorites (achondrites) were measured to permit comparison with astronomical observations of dust in different stages of evolution of young stellar objects. In contrast to primitive chondrites, achondrites underwent heavy metamorphism and/or extensive melting and represent more advanced stages of planetesimal evolution. Spectra were obtained from primitive achondrites (acapulcoite, winonaite, ureilite, and brachinite) and differentiated achondrites (eucrite, diogenite, aubrite, and mesosiderite silicates). The ureilite and brachinite show spectra dominated by olivine features, and the diogenite and aubrite by pyroxene features. The acapulcoite, winonaite, eucrite, and mesosiderite silicates exhibit more complex spectra, reflecting their multi-phase bulk mineralogy.

Mixtures of spectra of the primitive achondrites and differentiated achondrites in various proportions show good similarities to the spectra of the few Myr old protoplanetary disks HD104237A and V410 Anon 13. A spectrum of the differentiated mesosiderite silicates is similar to the spectra of the mature debris disks HD172555 and HD165014. A mixture of spectra of the primitive ureilite and brachinite is similar to the spectrum of the debris disk HD113766. The results raise the possibility that materials produced in the early stage of planetesimal differentiation occur in the protoplanetary and debris disks.

Item Type: Journal Article
Copyright Holders: 2012 Elsevier Inc.
ISSN: 0019-1035
Keywords: infrared observations; planetary formation; debris disks; spectroscopy
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 33871
Depositing User: Monica Grady
Date Deposited: 20 Jun 2012 13:32
Last Modified: 23 Nov 2012 11:59
URI: http://oro.open.ac.uk/id/eprint/33871
Share this page:

Actions (login may be required)

View Item
Report issue / request change

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340   general-enquiries@open.ac.uk