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A sub-Mercury-sized exoplanet

机译：亚汞大小的系外行星

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摘要

Since the discovery of the first exoplanets, it has been known that other planetary systems can look quite unlike our own3. Until fairly recently, we have been able to probe only the upper range of the planet size distribution and, since last year, to detect planets that are the size of Earth6 or somewhat smaller7. Hitherto, no planets have been found that are smaller than those we see in8 the Solar System. Here we report a planet significantly smaller than Mercury. This tiny planet is the innermost of three that orbit the Sun-like host star, which we have designated Kepler-37. Owing to its extremely small size, similar to that of the Moon, and highly irradiated surface, the planet, Kepler-37b, is probably rocky with no atmosphere or water, similar to Mercury.%当“开普勒”飞船2009年发射时，其使命是搜索我们银河系中太阳类主星周围的石质行星。数百颗已知太阳系外行星中很多都是与其主星距离很近的大“热木星”。去年探测地球大小的太阳系外行星成为可能，而现在又发现了一颗比水星小很多的石质行星。Kepler-37b在一个至少有两颗其他行星的系统中绕太阳类恒星Kepler-37运转。它在大小上与我们的月球相似，并且还可能像水星．石质，没有大气，也没有水。
机译：Since the discovery of the first exoplanets, it has been known that other planetary systems can look quite unlike our own3. Until fairly recently, we have been able to probe only the upper range of the planet size distribution and, since last year, to detect planets that are the size of Earth6 or somewhat smaller7. Hitherto, no planets have been found that are smaller than those we see in8 the Solar System. Here we report a planet significantly smaller than Mercury. This tiny planet is the innermost of three that orbit the Sun-like host star, which we have designated Kepler-37. Owing to its extremely small size, similar to that of the Moon, and highly irradiated surface, the planet, Kepler-37b, is probably rocky with no atmosphere or water, similar to Mercury.%当“开普勒”飞船2009年发射时，其使命是搜索我们银河系中太阳类主星周围的石质行星。数百颗已知太阳系外行星中很多都是与其主星距离很近的大“热木星”。去年探测地球大小的太阳系外行星成为可能，而现在又发现了一颗比水星小很多的石质行星。Kepler-37b在一个至少有两颗其他行星的系统中绕太阳类恒星Kepler-37运转。它在大小上与我们的月球相似，并且还可能像水星．石质，没有大气，也没有水。

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  • 来源
    《Nature》 |2013年第7438期|452-454a3|共4页
  • 作者

    Thomas Barclay; Jason F. Rowe; Jack J. Lissauer; Daniel Huber; Francois Fressinet al;

  • 作者单位

    NASA Ames Research Center, Moffett Field, California 94035, USA,Bay Area Environmental Research Institute, 596 First Street West, Sonoma, California 95476, USA;

    NASA Ames Research Center, Moffett Field, California 94035, USA,SETI Institute, 189 BernardoAvenue, Mountain View, California 94043, USA;

    NASA Ames Research Center, Moffett Field, California 94035, USA;

    NASA Ames Research Center, Moffett Field, California 94035, USA;

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