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Protostars and Planets
In recent years, astronomers have begun to discover an increasing number of planets orbiting stars outside our solar system. The characteristics and origins of these planetary bodies are the subjectExpand
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Aluminum‐26 in calcium‐aluminum‐rich inclusions and chondrules from unequilibrated ordinary chondrites
In order to investigate the distribution of ^(26)A1 in chondrites, we measured aluminum-magnesium systematics in four calcium-aluminum-rich inclusions (CAIs) and eleven aluminum-rich chondrules fromExpand
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Modal abundances of CAIs: Implications for bulk chondrite element abundances and fractionations
Modal abundances of Ca,Al-rich inclusions (CAIs) are poorly known and reported data scatter across large ranges. CAIs are Poisson distributed, and if only small areas (<1000 mm2) are studied, theExpand
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Geo- and cosmochemistry of the twin elements yttrium and holmium
We have analyzed the Y/Ho-ratios in bulk chondrites, chondrules and four Ca- and Al-rich inclusions (CAIs) from carbonaceous and unequilibrated ordinary and enstatite chondrites (EC) by laserExpand
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We report high-precision measurements of nitrogen and carbon isotopic compositions of a carbon-bearing titanium-nitride (osbornite) in a calcium-aluminum-rich inclusion (CAI) from the CH/CB-likeExpand
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Protostars and Planets VI
Various papers on the formation of stars and planets are presented. The general topics addressed include: molecular clouds and star formation, young stellar objects and circumstellar disks, chemistryExpand
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The origin of chondritic macromolecular organic matter: a carbon and nitrogen isotope study.
The N and C abundances and isotopic compositions of acid-insoluble carbonaceous material in thirteen primitive chondrites (five unequilibrated ordinary chondrites, three CM chondrites, threeExpand
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Origin and chronology of chondritic components: A review
Abstract Mineralogical observations, chemical and oxygen–isotope compositions, absolute 207Pb–206Pb ages and short-lived isotope systematics (7Be–7Li, 10Be–10B, 26Al–26Mg, 36Cl–36S, 41Ca–41K,Expand
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An isotopic and petrologic study of calcium-aluminum-rich inclusions from CO3 meteorites
We have studied the mineralogy and petrology of 229 calcium-aluminum-rich inclusions (CAIs) from ten CO3 meteorites of petrologic types 3.0–3.7. Subsets of these inclusions were measured by ion probeExpand
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Amoeboid olivine aggregates and related objects in carbonaceous chondrites: records of nebular and asteroid processes
Amoeboid olivine aggregates (AOAs) are the most common type of refractory inclusions in CM, CR, CH, CV, CO, and ungrouped carbonaceous chondrites Acfer 094 and Adelaide; only one AOA was found in theExpand
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