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An Earth-mass planet orbiting a Centauri B

机译：绕半人马座B绕行的地球质量行星

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摘要

一个具有跟地球差不多质量的太阳系外行星已rn被发现在绕附近恒星α Cerltauri B的轨道上运rn行。该行星不在适于居住的区域，因为它与其rn恒星的距离要比我们与太阳的距离近得多，轨rn道距其恒星只有大约0.04个天文单位(一个天rn文单位是地球与太阳之间的平均距离)。统计rn研究表明，低质量行星优先在多行星体系中形rn成，所以有可能其他行星也在绕α Centauri Brn运行，并且可能是在其适于居住的区域。%Exoplanets down to the size of Earth have been found, but not in the habitable zone-that is, at a distance from the parent star at which water, if present, would be liquid. There are planets in the habitable zone of stars cooler than our Sun, but for reasons such as tidal locking and strong stellar activity, they are unlikely to harbour water-carbon life as we know it. The detection of a habitable Earth-mass planet orbiting a star similar to our Sun is extremely difficult, because such a signal is overwhelmed by stellar perturbations. Here we report the detection of an Earth-mass planet orbiting our neighbour star a Centauri B, a member of the closest stellar system to the Sun. The planet has an orbital period of 3.236 days and is about 0.04 astronomical units from the star (one astronomical unit is the Earth-Sun distance).
机译：一个具有跟地球差不多质量的太阳系外行星已rn被发现在绕附近恒星α Cerltauri B的轨道上运rn行。该行星不在适于居住的区域，因为它与其rn恒星的距离要比我们与太阳的距离近得多，轨rn道距其恒星只有大约0.04个天文单位(一个天rn文单位是地球与太阳之间的平均距离)。统计rn研究表明，低质量行星优先在多行星体系中形rn成，所以有可能其他行星也在绕α Centauri Brn运行，并且可能是在其适于居住的区域。%Exoplanets down to the size of Earth have been found, but not in the habitable zone-that is, at a distance from the parent star at which water, if present, would be liquid. There are planets in the habitable zone of stars cooler than our Sun, but for reasons such as tidal locking and strong stellar activity, they are unlikely to harbour water-carbon life as we know it. The detection of a habitable Earth-mass planet orbiting a star similar to our Sun is extremely difficult, because such a signal is overwhelmed by stellar perturbations. Here we report the detection of an Earth-mass planet orbiting our neighbour star a Centauri B, a member of the closest stellar system to the Sun. The planet has an orbital period of 3.236 days and is about 0.04 astronomical units from the star (one astronomical unit is the Earth-Sun distance).

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  • 来源
    《Nature》 |2012年第7423期|p.207-211A1|共6页
  • 作者

    Xavier Dumusque; Francesco Pepe; Christophe Lovis; Damien Segransan; Johannes Sahlmann; Willy Benz; Francois Bouchy; Michel Mayor; Didier Queloz; Nuno Santos; Stephane Udry;

  • 作者单位

    Observatoirede Geneve, Universitede Geneve, 51 chemindes Maillettes, CH-1290 Sauverny, Switzerland,Centro de Astroftsica da Universidade do Porto, Rua das Estrelas, P-4150-762 Porto, Portugal;

    Observatoirede Geneve, Universitede Geneve, 51 chemindes Maillettes, CH-1290 Sauverny, Switzerland;

    Observatoirede Geneve, Universitede Geneve, 51 chemindes Maillettes, CH-1290 Sauverny, Switzerland;

    Observatoirede Geneve, Universitede Geneve, 51 chemindes Maillettes, CH-1290 Sauverny, Switzerland;

    Observatoirede Geneve, Universitede Geneve, 51 chemindes Maillettes, CH-1290 Sauverny, Switzerland;

    Physikalisches Institut Universitat Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland;

    Observatoirede Geneve, Universitede Geneve, 51 chemindes Maillettes, CH-1290 Sauverny, Switzerland,Institutd'Astrophysique de Paris, UMR7095CNRS, Universite Pierre & Marie Curie, 98bis Boulevard Arago, F-75014 Paris, France;

    Observatoirede Geneve, Universitede Geneve, 51 chemindes Maillettes, CH-1290 Sauverny, Switzerland;

    Observatoirede Geneve, Universitede Geneve, 51 chemindes Maillettes, CH-1290 Sauverny, Switzerland;

    Centro de Astroftsica da Universidade do Porto, Rua das Estrelas, P-4150-762 Porto, Portugal,Departamento de Rsica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Rua do Campo Alegre s, P-4169-007 Porto, Portugal;

    Observatoirede Geneve, Universitede Geneve, 51 chemindes Maillettes, CH-1290 Sauverny, Switzerland;

  • 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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