Chondrulelike Objects in Short-Period Comet 81P/Wild 2-Reference-Cited by-同舟云学术

Chondrulelike Objects in Short-Period Comet 81P/Wild 2

Published:2008-09-19 Issue:5896 Volume:321 Page:1664-1667
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Nakamura Tomoki¹²³⁴⁵,Noguchi Takaaki¹²³⁴⁵,Tsuchiyama Akira¹²³⁴⁵,Ushikubo Takayuki¹²³⁴⁵,Kita Noriko T.¹²³⁴⁵,Valley John W.¹²³⁴⁵,Zolensky Michael E.¹²³⁴⁵,Kakazu Yuki¹²³⁴⁵,Sakamoto Kanako¹²³⁴⁵,Mashio Etsuko¹²³⁴⁵,Uesugi Kentaro¹²³⁴⁵,Nakano Tsukasa¹²³⁴⁵

Affiliation:

1. Department of Earth and Planetary Science, Faculty of Science, Kyushu University, Hakozaki, Fukuoka 812-8581, Japan.

2. College of Science, Ibaraki University, 2-1-1 Bunkyo, Mito 310-8512, Japan.

3. Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka 560-0043, Japan.

4. Department of Geology and Geophysics, University of Wisconsin-Madison, Madison, WI 53706–1692, USA.

5. Astromaterials Research and Exploration Science, NASA Johnson Space Center, Houston, TX 77058, USA.

Abstract

The Stardust spacecraft returned cometary samples that contain crystalline material, but the origin of the material is not yet well understood. We found four crystalline particles from comet 81P/Wild 2 that were apparently formed by flash-melting at a high temperature and are texturally, mineralogically, and compositionally similar to chondrules. Chondrules are submillimeter particles that dominate chondrites and are believed to have formed in the inner solar nebula. The comet particles show oxygen isotope compositions similar to chondrules in carbonaceous chondrites that compose the middle-to-outer asteroid belt. The presence of the chondrulelike objects in the comet suggests that chondrules have been transported out to the cold outer solar nebula and spread widely over the early solar system.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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