Nightside condensation of iron in an ultrahot giant exoplanet

doi:10.1038/s41586-020-2107-1

GSTDTAP > 地球科学

DOI	10.1038/s41586-020-2107-1
	Nightside condensation of iron in an ultrahot giant exoplanet
	Lu, Zhihao 1,2,3; Zou, Jianling 2; Li, Shuang 2; Topper, Michael J.3; Tao, Yong 3; Zhang, Hao 4; Jiao, Xi 2; Xie, Wenbing 3; Kong, Xiangqian 3; Vaz, Michelle 3; Li, Huili 3; Cai, Yi 3; Xia, Limin 3,5; Huang, Peng 3; Rodgers, Kristen 1; Lee, Beverly 1; Riemer, Joanne B.3; Day, Chi-Ping 6; Yen, Ray-Whay Chiu 3; Cui, Ying 3; Wang, Yujiao 2; Wang, Yanni 2; Zhang, Weiqiang 1,7; Easwaran, Hariharan 3; Hulbert, Alicia 1,8; Kim, KiBem 3; Juergens, Rosalyn A.9; Yang, Stephen C.1; Battafarano, Richard J.1; Bush, Errol L.1; Broderick, Stephen R.1; Cattaneo, Stephen M.10; Brahmer, Julie R.3; Rudin, Charles M.11; Wrangle, John 12; Mei, Yuping 1,3; Kim, Young J.13; Zhang, Bin 14,15; Wang, Ken Kang-Hsin 14; Forde, Patrick M.3; Margolick, Joseph B.4; Nelkin, Barry D.3; Zahnow, Cynthia A.3; Pardoll, Drew M.3,16; Housseau, Franck 3,16; Baylin, Stephen B.3; Shen, Lin 3; Brock, Malcolm V.1,3
	2020-02-26
发表期刊	NATURE
ISSN	0028-0836
EISSN	1476-4687
出版年	2020
卷号	580 期号:7805 页码:597-+
文章类型	Article
语种	英语
国家	Switzerland; Spain; Italy; Portugal; Germany; Chile; Austria
英文关键词	Ultrahot giant exoplanets receive thousands of times Earth' s insolation(1,2). Their high-temperature atmospheres (greater than 2,000 kelvin) are ideal laboratories for studying extreme planetary climates and chemistry(3-5). Daysides are predicted to be cloud-free, dominated by atomic species(6) and much hotter than nightsides(5,7,8). Atoms are expected to recombine into molecules over the nightside(9), resulting in different day and night chemistries. Although metallic elements and a large temperature contrast have been observed(10-14), no chemical gradient has been measured across the surface of such an exoplanet. Different atmospheric chemistry between the day-to-night (' evening' ) and night-to-day (' morning' ) terminators could, however, be revealed as an asymmetric absorption signature during transit(4,7,15). Here we report the detection of an asymmetric atmospheric signature in the ultrahot exoplanet WASP-76b. We spectrally and temporally resolve this signature using a combination of high-dispersion spectroscopy with a large photon-collecting area. The absorption signal, attributed to neutral iron, is blueshifted by -11 +/- 0.7 kilometres per second on the trailing limb, which can be explained by a combination of planetary rotation and wind blowing from the hot dayside(16). In contrast, no signal arises from the nightside close to the morning terminator, showing that atomic iron is not absorbing starlight there. We conclude that iron must therefore condense during its journey across the nightside. Absorption lines of iron in the dayside atmosphere of an ultrahot giant exoplanet disappear after travelling across the nightside, showing that the iron has condensed during its travel.
领域	地球科学 ; 气候变化 ; 资源环境
收录类别	SCI-E
WOS记录号	WOS:000526613500001
WOS关键词	HOT JUPITERS ; ATMOSPHERIC CIRCULATION ; EXTRASOLAR PLANET ; STELLAR ROTATION ; HOST STARS ; TRANSIT ; SEARCH ; MASS ; DISSOCIATION ; SIMULATIONS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/281118
专题	地球科学资源环境科学气候变化
作者单位	1.Johns Hopkins Univ, Sch Med, Dept Surg, Baltimore, MD 21205 USA; 2.Peking Univ, Canc Hosp & Inst, Dept Gastrointestinal Oncol, Key Lab Carcinogenesis & Translat Res,Minist Educ, Beijing, Peoples R China; 3.Johns Hopkins Sch Med, Dept Oncol, Sidney Kimmel Comprehens Canc Ctr, Baltimore, MD 21205 USA; 4.Johns Hopkins Bloomberg Sch Publ Hlth, Dept Mol Microbiol & Immunol, Baltimore, MD USA; 5.Air Force Med Univ, State Key Lab Canc Biol, Natl Clin Res Ctr Digest Dis, Xijing Hosp Digest Dis, Xian, Peoples R China; 6.NCI, Lab Canc Biol & Genet, NIH, Bethesda, MD 20892 USA; 7.Peoples Liberat Army Gen Hosp, Dept Thorac Surg, Med Ctr 7, Beijing, Peoples R China; 8.Univ Illinois, Coll Med, Dept Surg, Chicago, IL USA; 9.McMaster Univ, Juravinski Canc Ctr, Div Med Oncol, Hamilton, ON, Canada; 10.Anne Arundel Med Ctr, Dept Surg, Annapolis, MD USA; 11.Mem Sloan Kettering Canc Ctr, Thorac Oncol Serv, 1275 York Ave, New York, NY 10021 USA; 12.Med Univ South Carolina, Div Hematol Oncol, Charleston, SC 29425 USA; 13.Vanderbilt Univ, Dept Otolaryngol Head & Neck Surg, 221 Kirkland Hall, Nashville, TN 37235 USA; 14.Johns Hopkins Univ, Dept Radiat Oncol & Mol Radiat Sci, Baltimore, MD USA; 15.Dalian Univ Technol, Sch Biomed Engn, Dalian, Peoples R China; 16.Johns Hopkins Univ, Sch Med, Bloomberg Kimmel Inst Canc Immunotherapy, Baltimore, MD 21218 USA
推荐引用方式 GB/T 7714	Lu, Zhihao,Zou, Jianling,Li, Shuang,et al. Nightside condensation of iron in an ultrahot giant exoplanet[J]. NATURE,2020,580(7805):597-+.
APA	Lu, Zhihao.,Zou, Jianling.,Li, Shuang.,Topper, Michael J..,Tao, Yong.,...&Brock, Malcolm V..(2020).Nightside condensation of iron in an ultrahot giant exoplanet.NATURE,580(7805),597-+.
MLA	Lu, Zhihao,et al."Nightside condensation of iron in an ultrahot giant exoplanet".NATURE 580.7805(2020):597-+.