Direct Imaging of Multiple Planets Orbiting the Star HR 8799

被引：1391

作者：

Marois, Christian ^{[1
,2
,3
]}

Macintosh, Bruce ^{[2
]}

Barman, Travis ^{[4
]}

Zuckerman, B. ^{[5
,6
]}

Song, Inseok ^{[7
]}

Patience, Jennifer ^{[8
]}

Lafreniere, David ^{[9
]}

Doyon, Rene ^{[10
,11
]}

机构：

[1] Natl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC V9E 2E7, Canada

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[3] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[4] Lowell Observ, Flagstaff, AZ 86001 USA

[5] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[6] Univ Calif Los Angeles, Ctr Astrobiol, Los Angeles, CA 90095 USA

[7] Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA

[8] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England

[9] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada

[10] Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada

[11] Univ Montreal, Observ Mont Megant, Montreal, PQ H3C 3J7, Canada

来源：

SCIENCE | 2008年 / 322卷 / 5906期

基金：

英国科学技术设施理事会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1126/science.1166585

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：

Direct imaging of exoplanetary systems is a powerful technique that can reveal Jupiter- like planets in wide orbits, can enable detailed characterization of planetary atmospheres, and is a key step toward imaging Earth- like planets. Imaging detections are challenging because of the combined effect of small angular separation and large luminosity contrast between a planet and its host star. High- contrast observations with the Keck and Gemini telescopes have revealed three planets orbiting the star HR 8799, with projected separations of 24, 38, and 68 astronomical units. Multi- epoch data show counter clockwise orbital motion for all three imaged planets. The low luminosity of the companions and the estimated age of the system imply planetary masses between 5 and 13 times that of Jupiter. This system resembles a scaled- up version of the outer portion of our solar system.

引用

页码：1348 / 1352

页数：5

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