气候变化领域集成服务门户(CCPortal): A measurement of the wind speed on a brown dwarf

CCPortal

DOI	10.1126/science.aaz2856
	A measurement of the wind speed on a brown dwarf
	Allers K.N.; Vos J.M.; Biller B.A.; Williams P.K.G.
发表日期	2020
ISSN	0036-8075
起始页码	169
结束页码	172
卷号	368 期号:6487
英文摘要	Zonal (latitudinal) winds dominate the bulk flow of planetary atmospheres. For gas giant planets such as Jupiter, the motion of clouds can be compared with radio emissions from the magnetosphere, which is connected to the planet's interior, to determine the wind speed. In principle, this technique can be applied to brown dwarfs and/or directly imaged exoplanets if periods can be determined for both the infrared and radio emissions. We apply this method to measure the wind speeds on the brown dwarf 2MASS J10475385+2124234. The difference between the radio period of 1.751 to 1.765 hours and infrared period of 1.741 ± 0.007 hours implies a strong wind (+650 ± 310 meters per second) proceeding eastward. This could be due to atmospheric jet streams and/or low frictional drag at the bottom of the atmosphere. © 2020 The Authors.
关键词	detection method emission Jupiter measurement method numerical method planetary atmosphere wind velocity zonal wind article astronomy atmosphere infrared radiation motion wind speed
语种	英语
来源机构	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133581
推荐引用方式 GB/T 7714	Allers K.N.,Vos J.M.,Biller B.A.,et al. A measurement of the wind speed on a brown dwarf[J]. Science,2020,368(6487).
APA	Allers K.N.,Vos J.M.,Biller B.A.,&Williams P.K.G..(2020).A measurement of the wind speed on a brown dwarf.,368(6487).
MLA	Allers K.N.,et al."A measurement of the wind speed on a brown dwarf".368.6487(2020).