GJ 832c: A SUPER-EARTH IN THE HABITABLE ZONE

被引：46

作者：

Wittenmyer, Robert A. ^{[1
,2
,3
]}

Tuomi, Mikko ^{[4
,5
]}

Butler, R. P. ^{[6
]}

Jones, H. R. A. ^{[4
]}

Anglada-Escude, Guillem ^{[7
]}

Horner, Jonathan ^{[1
,2
,3
]}

Tinney, C. G. ^{[1
,2
]}

Marshall, J. P. ^{[1
,2
]}

Carter, B. D. ^{[3
]}

Bailey, J. ^{[1
,2
]}

Salter, G. S. ^{[1
,2
]}

O'Toole, S. J. ^{[8
]}

Wright, D. ^{[1
,2
]}

Crane, J. D. ^{[9
]}

Schectman, S. A. ^{[9
]}

Arriagada, P.

Thompson, I. ^{[9
]}

Minniti, D. ^{[10
,11
,12
]}

Jenkins, J. S. ^{[13
]}

Diaz, M.

机构：

[1] UNSW Australia, Sch Phys, Sydney, NSW 2052, Australia

[2] UNSW Australia, Australian Ctr Astrobiol, Sydney, NSW 2052, Australia

[3] Univ So Queensland, Computat Engn & Sci Res Ctr, Toowoomba, Qld 4350, Australia

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

[5] Univ Turku, Dept Phys & Astron, Tuorla Observ, FI-21500 Piikkio, Finland

[6] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA

[7] Univ London, Sch Math Sci, Astron Unit, London, England

[8] Australian Astron Observ, N Ryde, NSW 1670, Australia

[9] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA

[10] Pontificia Univ Catolica Chile, Inst Astrophys, Santiago 22, Chile

[11] Vatican Observ, Vatican, Italy

[12] Univ Andres Bello, Dept Ciencias Fis, Santiago, Chile

[13] Univ Chile, Dept Astron, Santiago, Chile

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 791卷 / 02期

基金：

澳大利亚研究理事会;

关键词：

astrobiology; planets and satellites: individual (GJ 832); techniques: radial velocities; OBSERVATORY PLANET SEARCH; CIRCLE-PLUS PLANET; SOLAR-TYPE STARS; GIANT PLANET; DEBRIS DISKS; JUPITER/SATURN ANALOG; HARPS SEARCH; M-DWARFS; K-GIANT; EXOPLANET;

D O I：

10.1088/0004-637X/791/2/114

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of GJ 832c, a super-Earth orbiting near the inner edge of the habitable zone of GJ 832, an M dwarf previously known to host a Jupiter analog in a nearly circular 9.4 yr orbit. The combination of precise radial-velocity measurements from three telescopes reveals the presence of a planet with a period of 35.68 +/- 0.03 days and minimum mass (m sin i) of 5.4 +/- 1.0 Earth masses. GJ 832c moves on a low-eccentricity orbit (e = 0.18 +/- 0.13) toward the inner edge of the habitable zone. However, given the large mass of the planet, it seems likely that it would possess a massive atmosphere, which may well render the planet inhospitable. Indeed, it is perhaps more likely that GJ 832c is a "super-Venus," featuring significant greenhouse forcing. With an outer giant planet and an interior, potentially rocky planet, the GJ 832 planetary system can be thought of as a miniature version of our own solar system.

引用

页数：11

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