A terrestrial planet candidate in a temperate orbit around Proxima Centauri

被引：702

作者：

Anglada-Escude, Guillem ^{[1
]}

Amado, Pedro J. ^{[2
]}

Barnes, John ^{[3
]}

Berdinas, Zaira M. ^{[2
]}

Butler, R. Paul ^{[4
]}

Coleman, Gavin A. L. ^{[1
]}

de la Cueva, Ignacio ^{[5
]}

Dreizler, Stefan ^{[6
]}

Endl, Michael ^{[7
]}

Giesers, Benjamin ^{[6
]}

Jeffers, Sandra V. ^{[6
]}

Jenkins, James S. ^{[8
]}

Jones, Hugh R. A. ^{[9
]}

Kiraga, Marcin ^{[10
]}

Kuerster, Martin ^{[11
]}

Lopez-Gonzalez, Maria J. ^{[2
]}

Marvin, Christopher J. ^{[6
]}

Morales, Nicolas ^{[2
]}

Morin, Julien ^{[12
]}

Nelson, Richard P. ^{[1
]}

Ortiz, Jose L. ^{[2
]}

Ofir, Aviv ^{[13
]}

Paardekooper, Sijme-Jan ^{[1
]}

Reiners, Ansgar ^{[6
]}

Rodriguez, Eloy ^{[2
]}

Rodriguez-Lopez, Cristina ^{[2
]}

Sarmiento, Luis F. ^{[6
]}

Strachan, John P. ^{[1
]}

Tsapras, Yiannis ^{[14
]}

Tuomi, Mikko ^{[9
]}

Zechmeister, Mathias ^{[6
]}

机构：

[1] Queen Mary Univ London, Sch Phys & Astron, 327 Mile End Rd, London E1 4NS, England

[2] CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain

[3] Open Univ, Dept Phys Sci, Walton Hall, Milton Keynes MK7 6AA, Bucks, England

[4] Carnegie Inst Sci, Dept Terr Magnetism, 5241 Broad Branch Rd NW, Washington, DC 20015 USA

[5] Astroimagen, C Abad & Lasierra 58 Bis,6-2, Ibiza 07800, Spain

[6] Univ Gottingen, Inst Astrophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany

[7] Univ Texas Austin, McDonald Observ, 2515 Speedway,C1400, Austin, TX 78712 USA

[8] Univ Chile, Dept Astron, Camino El Observ 1515, Santiago, Chile

[9] Univ Hertfordshire, Sci & Technol Res Inst, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England

[10] Univ Warsaw Observ, Aleje Ujazdowskie 4, Warsaw, Poland

[11] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[12] Univ Montpellier, Lab Univers & Particules Montpellier, Pl E Bataillon CC 72, F-34095 Montpellier 05, France

[13] Weizmann Inst Sci, Dept Earth & Planetary Sci, 234 Herzl St, IL-76100 Rehovot, Israel

[14] Astron Rech Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany

来源：

NATURE | 2016年 / 536卷 / 7617期

基金：

美国国家科学基金会;

关键词：

TIME-SERIES ANALYSIS; MAIN-SEQUENCE STARS; RADIAL-VELOCITY; HABITABLE ZONE; SOUTHERN STARS; SUPER-EARTH; SPACED DATA; NO PLANET; GJ; 221; SEARCH;

D O I：

10.1038/nature19106

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

At a distance of 1.295 parsecs(1), the red dwarf Proxima Centauri (a Centauri C, GL 551, HIP 70890 or simply Proxima) is the Sun's closest stellar neighbour and one of the best-studied low-mass stars. It has an effective temperature of only around 3,050 kelvin, a luminosity of 0.15 per cent of that of the Sun, a measured radius of 14 per cent of the radius of the Sun2 and a mass of about 12 per cent of the mass of the Sun. Although Proxima is considered a moderately active star, its rotation period is about 83 days (ref. 3) and its quiescent activity levels and X-ray luminosity(4) are comparable to those of the Sun. Here we report observations that reveal the presence of a small planet with a minimum mass of about 1.3 Earth masses orbiting Proxima with a period of approximately 11.2 days at a semi-major-axis distance of around 0.05 astronomical units. Its equilibrium temperature is within the range where water could be liquid on its surface(5).

引用

页码：437 / +

页数：18

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