对“富含难熔包体的古老小行星”的评论

Comment on "ancient asteroids enriched in refractory inclusions".

作者信息

Hezel Dominik C, Russell Sara S

机构信息

Impacts and Astromaterials Research Centre (IARC), Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, UK.

出版信息

Science. 2008 Nov 14;322(5904):1050; author reply 1050. doi: 10.1126/science.322.5904.1050c.

DOI:10.1126/science.322.5904.1050c

PMID:19008430

Abstract

Sunshine et al. (Reports, 25 April 2008, p. 514) reported that certain asteroids contain 30 +/- 10 volume percent calcium- and aluminum-rich inclusions (CAIs). We contend that the amount of CAIs in CV chondrites is two to three times as low as the 10 volume percent assumed by the authors; thus, we question whether the CAI-rich bodies they studied are indeed older than known asteroids or formed before the injection of (26)Al into the solar nebula.

摘要

阳光等人（《报告》，2008年4月25日，第514页）报告称，某些小行星含有体积比为30±10%的富钙铝包体（CAIs）。我们认为，碳质球粒陨石中的CAIs含量比作者假设的10%体积比低两到三倍；因此，我们质疑他们研究的富含CAI的天体是否真的比已知小行星更古老，或者是否在（26）铝注入太阳星云之前就已形成。