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相关概念视频

Kepler's First Law of Planetary Motion01:10

Kepler's First Law of Planetary Motion

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开普勒-47:一个穿越的环双星多行星系统.

Jerome A Orosz1, William F Welsh, Joshua A Carter

  • 1Astronomy Department, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA. orosz@sciences.sdsu.edu

Science (New York, N.Y.)
|August 31, 2012
PubMed
概括
此摘要是机器生成的。

天文学家发现了开普勒-47,这是一个独特的行星系统,有两个行星围绕一颗双星运行. 这一发现表明,行星可以形成并存在于阴影双星系统中.

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科学领域:

  • 外行星科学是外行星的科学.
  • 天文学 天文学
  • 天体物理学 天体物理学

背景情况:

  • 双星系统在银河系中很常见.
  • 围绕双星的行星系统的形成和稳定性带来了独特的挑战.
  • 之前对二进制星系行星的探测是有限的.

研究的目的:

  • 报告探测和描述一个两个行星系统,开普勒-47,绕着一个日食双星运行.
  • 为了研究行星形成的潜力和二进制恒星环境中的可居住性.
  • 为了确定密切的双星可以容纳完整的行星系统.

主要方法:

  • 使用开普勒太空望远镜检测行星过境的过境光度.
  • 分析光线曲线以确定轨道周期,半径和恒星属性.
  • 辐射速度测量 (隐含) 用于质量测定和轨道确认.

主要成果:

  • 探测开普勒-47,一个有两个行星的系统 (开普勒-47b和开普勒-47c) 绕着一个日食双星运行.
  • 内行星 (开普勒-47b) 的半径是地球半径的3.0倍,每49.5天就一次绕地球运行.
  • 外行星 (开普勒-47c) 的半径是地球半径的4.6倍,每303.2天绕地球运行,位于可居住区.

结论:

  • 开普勒-47是第一个验证的系统,有多个行星绕着一个日食双星运行.
  • 开普勒-47的存在表明,完整的行星系统可以在靠近的双星周围形成.
  • 外行星在可居住区中的位置引发了关于这些系统潜在可居住性的问题.