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Back in focus

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摘要

Last year a conflagration of controversy engulfed the first planet ever claimed around a Sun-like star; now it has suddenly been extinguished, leaving the new world unscathed. The original suggestion that a planet exists around the star 51 Pegasi was based on periodic variations in Doppler shifts of the light from the star—presumably caused by wobbling because of the gravitational pull of the planet. But criticism of this interpretation came from David Gray, who reported spectral-line variations that could be caused only by an undulating, pulsating stellar surface, not an orbiting planet. This interpretation called into question the reality of not just the 51 Peg planet, but also the other five detected extrasolar planets, as highlighted by the cover oiNature (27 February 1997): "Extrasolar planets: Fading from view". But now, three papers (including those on page 153 and page 154 of this issue) report that the spectral evidence of pulsations is absent, after all. The empirical case for oscillations has vanished, leaving planets as the only plausible interpretation.
机译:去年,一场争论的大火吞没了有史以来第一颗围绕太阳般恒星的行星。现在它突然被扑灭,使新世界毫发无损。最初的建议是在恒星51佩加西周围存在一颗行星,这是基于恒星发出的光的多普勒频移的周期性变化而引起的,这大概是由于行星的引力引起的摆动所致。但是,对这种解释的批评来自戴维·格雷(David Gray),他报告了光谱线的变化,这可能仅是由起伏的,脉动的恒星表面而不是绕轨道运行的行星引起的。这种解释使人们不仅质疑51钉行星的现实,而且还质疑其他五个探测到的太阳系外行星的现实,这一点在《自然》杂志封面(1997年2月27日)中突出显示:“太阳系外行星:从视线中消失”。但是现在,三篇论文(包括本期第153页和第154页的论文)报告说,毕竟没有脉动的频谱证据。振荡的经验案例消失了,剩下行星是唯一合理的解释。

著录项

  • 来源
    《Nature》 |1998年第6663期|p.127|共1页
  • 作者

    Geoffrey Marcy;

  • 作者单位
  • 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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