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A distance of 133-137 parsecs to the Pleiades star cluster

机译:距the宿星团133-137秒差距

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摘要

Nearby 'open' clusters of stars (those that are not gravitationally bound) have played a crucial role in the development of stellar astronomy because, as a consequence of the stars having a common age, they provide excellent natural laboratories to test theoretical stellar models. Clusters also play a fundamental part in determining distance scales. The satellite Hipparcos1 surprisingly found that an extensively studied open cluster―the Pleiades (also known as the Seven Sisters)―had a distance of D = 118 +-4pc (refs 2, 3), about ten per cent smaller than the accepted value. The discrepancy generated a spirited debate because the implication was that either current stellar models were incorrect by a surprising amount or Hipparcos was giving incorrect distances. Here we report the orbital parameters of the bright double star Atlas in the Pleiades, using long-baseline optical/infrared interferometry. From the data we derive a firm lower bound of D > 127 pc, with the most likely range being 133 < D < 137 pc. Our result reaffirms the fidelity of current stellar models.
机译:邻近的“开放”星团(不受重力约束)在恒星天文学的发展中起着至关重要的作用,因为由于恒星具有共同的年龄,它们提供了出色的自然实验室来测试理论恒星模型。聚类在确定距离尺度中也起着基本作用。令人惊讶的是,Hipparcos1卫星发现,一个经过广泛研究的开放星团-le宿星团(也称为七姐妹星)具有D = 118 + -4pc(参考文献2、3)的距离,比公认值小约百分之十。这种差异引起了激烈的争论,因为这意味着当前的恒星模型是不正确的,其数量惊人,或者Hipparcos给出的距离是不正确的。在这里,我们使用长基线光学/红外干涉仪报告了le宿星中明亮的双星图谱的轨道参数。从数据中我们得出D> 127 pc的确定的下限,最可能的范围是133

著录项

  • 来源
    《Nature》 |2004年第6972期|p.326-328|共3页
  • 作者单位

    Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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