气候变化领域集成服务门户(CCPortal): Zones, spots, and planetary-scale waves beating in brown dwarf atmospheres

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DOI	10.1126/science.aam9848
	Zones, spots, and planetary-scale waves beating in brown dwarf atmospheres
	Apai D.; Karalidi T.; Marley M.S.; Yang H.; Flateau D.; Metchev S.; Cowan N.B.; Buenzli E.; Burgasser A.J.; Radigan J.; Artigau E.; Lowrance P.
发表日期	2017
ISSN	0036-8075
起始页码	683
结束页码	687
卷号	357 期号:6352
英文摘要	Brown dwarfs are massive analogs of extrasolar giant planets and may host types of atmospheric circulation not seen in the solar system. We analyzed a long-term Spitzer Space Telescope infrared monitoring campaign of brown dwarfs to constrain cloud cover variations over a total of 192 rotations. The infrared brightness evolution is dominated by beat patterns caused by planetary-scale wave pairs and by a small number of bright spots. The beating waves have similar amplitudes but slightly different apparent periods because of differing velocities or directions.The power spectrum of intermediate-temperature brown dwarfs resembles that of Neptune, indicating the presence of zonal temperature and wind speed variations. Our findings explain three previously puzzling behaviors seen in brown dwarf brightness variations. © 2017, American Association for the Advancement of Science. All rights reserved.
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/242881
作者单位	Steward Observatory, The University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, United States; Lunar and Planetary Laboratory, University of Arizona, 1640 E. University Boulevard, Tucson, AZ 85721, United States; NASA Ames Research Center, Moffett Field, CA 94035, United States; Department of Physics, University of Cincinnati, 2600 Clifton Avenue, Cincinnati, OH 45221, United States; Department of Physics and Astronomy and Centre for Planetary Science and Exploration, University of Western Ontario, London, ON N6A 3K7, Canada; Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11795-3800, United States; Department of Earth and Planetary Sciences, McGill University, 3450 Rue University, Montreal, QC H3A 2A7, Canada; McGill Space Institute, 3550 Rue University, Montréal, QC H3A 2A7, Canada; Institut de Recherche sur les Exoplanètes (IREx), Département de Physique, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC H3C 3J7, Canada; Institute for Astr...
推荐引用方式 GB/T 7714	Apai D.,Karalidi T.,Marley M.S.,et al. Zones, spots, and planetary-scale waves beating in brown dwarf atmospheres[J],2017,357(6352).
APA	Apai D..,Karalidi T..,Marley M.S..,Yang H..,Flateau D..,...&Lowrance P..(2017).Zones, spots, and planetary-scale waves beating in brown dwarf atmospheres.Science,357(6352).
MLA	Apai D.,et al."Zones, spots, and planetary-scale waves beating in brown dwarf atmospheres".Science 357.6352(2017).