• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nature >A rotating disk of gas and dust around a young counterpart to beta Pictoris
【24h】

A rotating disk of gas and dust around a young counterpart to beta Pictoris

机译：旋转的气体和尘埃旋转盘围绕着Beta Pictoris的年轻部件

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

beta Pictoris is the best known example of a main-sequence star encircled by a tenuous disk. Optical and infrared images of beta Pic suggest that the disk is composed of dust grains which have been interpreted as the debris generated by the disruption of the asteroid-sized remnants of planet-formation processes. The star itself is relatively old, with an age in excess of 100 Myr. Here we present high-resolution millimetre-wave images of continuum and molecular-line emission from dust and gas surrounding a much younger star, MWC480: the stellar properties of MWC480 are similar to those of beta Pic, but its age is just 6Myr. The morphology of the circumstellar material and a comparison with the predictions of kinematic modelling indicate the presence of a rotating disk, gravitationally bound to the star. Moreover, the mass of the disk is greater than the minimum required to form a planetary system like our own. We therefore suggest that the disk around the young star MWC480 could be a progenitor of debris disks of the type associated with older stars such as beta Pic, and so holds much promise for the study of both the origin of debris disks and the early stages of the formation of planetary systems.
机译：beta Pictoris是一个由微弱的圆盘环绕的主序星的最著名例子。 βPic的光学和红外图像表明，该盘由尘埃颗粒组成，这些尘埃颗粒被解释为是由于行星形成过程中小行星大小的残余物破裂而产生的碎片。这颗恒星本身比较古老，年龄超过100迈尔。在这里，我们呈现了一颗更年轻的恒星MWC480周围的尘埃和气体发出的连续体和分子线发射的高分辨率毫米波图像：MWC480的恒星特性类似于beta Pic，但其年龄仅为6Myr。恒星物质的形态以及与运动学模型预测的比较表明存在着引力地与恒星结合的旋转盘。而且，磁盘的质量大于形成像我们这样的行星系统所需的最小质量。因此，我们建议，年轻恒星MWC480周围的盘可能是与诸如Pic等较老恒星相关的类型的碎片盘的祖先，因此对于研究碎片盘的起源和早期阶段都具有广阔的前景。行星系统的形成。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号