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Transiting circumbinary planets Kepler-34 b and Kepler-35 b

机译：过境行星开普勒34 b和开普勒35 b

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摘要

Most Sun-like stars in the Galaxy reside in gravitationally bound pairs of stars~(1,2) (binaries). Although long anticipated~(3,8), the existence of a 'circumbinary planet' orbiting such a pair of normal stars was not definitively established until the discovery~9 of the planet transiting (that is, passing in front of) Kepler-16. Questions remained, however, about the prevalence of circumbinary planets and their range of orbital and physical properties. Here we report two additional transiting circumbinary planets: Kepler-34 (AB)b and Kepler-35 (AB)b, referred to here as Kepler-34 b and Kepler-35 b, respectively. Each is a low-density gas-giant planet on an orbit closely aligned with that of its parent stars. Kepler-34 b orbits two Sun-like stars every 289 days, whereas Kepler-35 b orbits a pair of smaller stars (89% and 81% of the Sun's mass) every 131 days. The planets experience large multi-periodic variations in incident stellar radiation arising from the orbital motion of the stars. The observed rate of circumbinary planets in our sample implies that more than ~1% of close binary stars have giant planets in nearly coplanar orbits, yielding a Galactic population of at least several million.
机译：银河系中大多数类似太阳的恒星都位于由引力束缚的一对恒星中，〜（1,2）（双星）。尽管早已预料到（3,8），但直到这样的发现〜9行星经过开普勒16（即在开普勒16之前经过）时，才确定存在围绕这样一对正常恒星运行的“外行星”的存在。 。然而，关于外行星的流行及其轨道和物理性质的范围仍然存在疑问。在这里，我们报告了另外两个过境行星：开普勒34（AB）b和开普勒35（AB）b，在此分别称为开普勒34 b和开普勒35 b。每个行星都是一个低密度的巨型气体行星，位于与其母星紧密对准的轨道上。开普勒34 b每289天绕两颗类似太阳的恒星旋转，而开普勒35 b每131天绕一对较小的恒星绕轨道运行（分别占太阳质量的89％和81％）。行星由于恒星的轨道运动而在入射恒星辐射中经历大的多周期变化。在我们的样本中观察到的环绕行星比率表明，约有1％以上的近距离双星在接近共面的轨道上有巨型行星，产生的银河系人口至少为几百万。

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  • 来源
    《Nature》 |2012年第7382期|p.475-479|共5页
  • 作者

    William F. Welsh; Jerome A. Orosz; Joshua A. Carter; Daniel C. Fabrycky; Eric B. Ford; etal;

  • 作者单位

    Astronomy Department, San Diego State University, 5500 Campanile Drive, San Diego, California 92182, USA.;

    Astronomy Department, San Diego State University, 5500 Campanile Drive, San Diego, California 92182, USA.;

    Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge,Massachusetts 02138, USA.;

    UC0/Lick Observatory, University of California, Santa Cruz, California 95064, USA.;

    University of Florida, 211 Bryant Space Science Center, Gainesville, Florida 32611-2055,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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