• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nature Astronomy >A three-dimensional map of the hot Local Bubble using diffuse interstellar bands
【24h】

A three-dimensional map of the hot Local Bubble using diffuse interstellar bands

机译：使用漫射星际带的热局部气泡的三维图

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

The Solar System is located within a low-density cavity known as the Local Bubble, which appears to be filled with an X-rayemitting gas at a temperature of 10~6 K (ref.). Such conditions are too harsh for typical interstellar atoms and molecules to survive. The diffuse interstellar bands (DIBs), the carriers of which remain largely unidentified, often appear as absorption features in stellar spectra and can be used to trace interstellar gas. Here we report the three-dimensional (3D) structure of the Local Bubble using two different DIB tracers (λ5,780 and λ5,797), which reveals that DIB carriers are present within the Bubble. The 3D map shows low values of λ5,797/λ5,780 inside the Bubble compared with the outside. This finding proves that the carrier of the λ5,780 DIB can withstand X-ray photodissociation and sputtering by fast ions, whereas the carrier of the λ5,797 DIB succumbs. This implies that DIB carriers are more stable than hitherto thought, and that the carrier of the λ5,780 DIB must be larger than that of the λ5,797 DIB. Alternatively, small-scale denser (and cooler) structures that shield some of the DIB carriers must be prevalent within the Bubble, suggesting that such structures may be an intrinsic feature of supernova-driven bubbles.
机译：太阳系位于一个称为局部气泡的低密度腔内，该气泡似乎充满了温度为10〜6 K（参考）的X射线气体。这样的条件对于典型的星际原子和分子来说很难生存。弥散的星际带（DIB）的载波在很大程度上尚未确定，通常在恒星光谱中表现为吸收特征，可用于追踪星际气体。在这里，我们使用两个不同的DIB示踪剂（λ5,780和λ5,797）报告了局部气泡的三维（3D）结构，这揭示了气泡中存在DIB载流子。 3D贴图显示气泡内部的λ5,797/λ5,780的值低于外部。这一发现证明，λ5,780DIB的载体可以承受X射线光解离和快速离子的溅射，而λ5,797DIB的载体却可以承受。这意味着DIB载波比迄今为止认为的更稳定，并且λ5,780DIB的载波必须大于λ5,797DIB的载波。另外，在气泡中必须普遍存在屏蔽某些DIB载流子的小规模密集（较冷）结构，这表明这种结构可能是超新星驱动的气泡的固有特征。

著录项

  • 来源
    《Nature Astronomy》 |2019年第10期|922-927|共6页
  • 作者

    Amin Farhang; Jacco Th. van Loon; Habib G. Khosroshahi; Atefeh Javadi; Mandy Bailey;

  • 作者单位

    School of Astronomy Institute for Research in Fundamental Sciences Tehran Iran Department of Physics and Astronomy The University of Western Ontario London Ontario Canada;

    Lennard-Jones Laboratories Keele University Keele UK;

    School of Astronomy Institute for Research in Fundamental Sciences Tehran Iran;

    The Open University Associate Lecturer Services (STEM) Manchester UK;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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