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Misaligned protoplanetary disks in a young binary star system

机译：年轻的双星系统中原行星盘未对准

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摘要

Many extrasolar planets follow orbits that differ from the nearly coplanar and circular orbits found in our Solar System; their orbits may be eccentric or inclined with respect to the host star's equator, and the population of giant planets orbiting close to their host stars suggests appreciable orbital migration. There is at present no consensus on what produces such orbits. Theoretical explanations often invoke interactions with a binary companion star in an orbit that is inclined relative to the planet's orbital plane. Such mechanisms require significant mutual inclinations between the planetary and binary star orbital planes. The protoplanetary disks in a few young binaries are misaligned, but often the measurements of these misalignments are sensitive only to a small portion of the inner disk, and the three-dimensional misalignment of the bulk of the planet-forming disk mass has hitherto not been determined. Here we report that the protoplanetary disks in the young binary system HK Tauri are misaligned by 60 to 68 degrees, such that one or both of the disks are significantly inclined to the binary orbital plane. Our results demonstrate that the necessary conditions exist for misalignment-driven mechanisms to modify planetary orbits, and that these conditions are present at the time of planet formation, apparently because of the binary formation process.
机译：许多太阳系外行星遵循的轨道不同于我们太阳系中几乎共面和圆形的轨道；它们的轨道相对于主恒星的赤道可能是偏心的或倾斜的，并且靠近其主恒星运行的巨型行星的总数表明轨道的迁移是可观的。目前，关于产生这种轨道的原因尚无共识。理论上的解释通常会引起与相对于行星轨道平面倾斜的轨道中的双星伴星的相互作用。这样的机构需要行星和双星轨道平面之间的显着相互倾斜。几个年轻的双星中的原行星盘未对准，但是对这些未对准的测量通常仅对内盘的一小部分敏感，并且迄今为止，尚未对形成行星的盘质量的大部分进行三维对准。决心。在这里，我们报告说，年轻的二元系统HK Tauri中的原行星盘未对准60至68度，因此其中一个或两个盘都显着倾斜于二元轨道平面。我们的结果表明存在由失准驱动机制修改行星轨道的必要条件，并且这些条件存在于行星形成时，这显然是由于二元形成过程。

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  • 来源
    《Nature》 |2014年第7511期|567-569|共3页
  • 作者

    Eric L. N. Jensen; Rachel Akeson;

  • 作者单位

    Department of Physics and Astronomy, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, USA;

    NASA Exoplanet Science Institute, IPAC/Caltech, Pasadena, California 91125, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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