...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical Journal. Supplement Series >Structure and evolution of debris disks around F-type stars. I. observations, database, and basic evolutionary aspects
【24h】

Structure and evolution of debris disks around F-type stars. I. observations, database, and basic evolutionary aspects

机译：F型恒星周围的碎片盘的结构和演化。一，观测资料，数据库和基本演化方面

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

Although photometric and spectroscopic surveys with the Spitzer Space Telescope remarkably increased the number of well-studied debris disks around A-type and Sun-like stars, detailed analyses of debris disks around F-type stars remained less frequent. Using the MIPS camera and the Infrared Spectrograph (IRS) spectrograph, we searched for debris dust around 82 F-type stars with Spitzer. We found 27 stars that harbor debris disks, nine of which are new discoveries. The dust distribution around two of our stars, HD50571 and HD170773, was found to be marginally extended on the 70 μm MIPS images. Combining the MIPS and IRS measurements with additional infrared and submillimeter data, we achieved excellent spectral coverage for most of our debris systems. We have modeled the excess emission of 22 debris disks using a single temperature dust ring model and of five debris systems with two-temperature models. The latter systems may contain two dust rings around the star. In accordance with the expected trends, the fractional luminosity of the disks declines with time, exhibiting a decay rate consistent with the range of model predictions. We found the distribution of radial dust distances as a function of age to be consistent with the predictions of both the self-stirred and the planetary-stirred disk evolution models. A more comprehensive investigation of the evolution of debris disks around F-type stars, partly based on the presented data set, will be the subject of an upcoming paper.
机译：尽管使用Spitzer空间望远镜进行的光度学和光谱学调查显着增加了A型恒星和类太阳恒星周围经过充分研究的碎片盘的数量，但对F型恒星周围的碎片盘进行详细分析的频率仍然较低。我们使用MIPS相机和红外光谱仪（IRS）光谱仪，用Spitzer搜索了82颗F型恒星周围的碎屑。我们发现了27个带有碎片盘的恒星，其中9个是新发现。发现在我们的两颗恒星HD50571和HD170773周围的尘埃分布在70μmMIPS图像上略有扩展。将MIPS和IRS测量与其他红外和亚毫米波数据相结合，我们为大多数碎片系统实现了出色的光谱覆盖。我们使用单温度集尘环模型对22个碎片盘的过量排放进行了建模，并使用两个温度模型对了五个碎片系统的过量排放进行了建模。后一个系统可能在恒星周围包含两个尘埃环。根据预期趋势，磁盘的分数光度随时间下降，其衰减率与模型预测范围一致。我们发现径向尘埃距离随年龄的分布与自搅拌和行星搅拌盘演化模型的预测一致。部分基于提出的数据集，对F型恒星周围的碎片盘演化的更全面的研究将成为即将发表论文的主题。

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