Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b

doi:10.1126/science.aat5348

	Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b
	Nortmann, Lisa 1,2; Palle, Enric 1,2; Salz, Michael 3; Sanz-Forcada, Jorge 4; Nagel, Evangelos 3; Alonso-Floriano, F. Javier 5; Czesla, Stefan 3; Yan, Fei 6; Chen, Guo 1,2,7; Snellen, Ignas A. G.5
刊名	SCIENCE
	2018-12-21
卷号	362 期号:6421 页码:1388-+
ISSN号	0036-8075
DOI	10.1126/science.aat5348
通讯作者	Nortmann, Lisa(nortman.astro@gmail.com)
英文摘要	Hot gas giant exoplanets can lose part of their atmosphere due to strong stellar irradiation, and these losses can affect their physical and chemical evolution. Studies of atmospheric escape from exoplanets have mostly relied on space-based observations of the hydrogen Lyman-alpha line in the far ultraviolet region, which is strongly affected by interstellar absorption. Using ground-based high-resolution spectroscopy, we detected excess absorption in the helium triplet at 1083 nanometers during the transit of the Saturn-mass exoplanet WASP-69b, at a signal-to-noise ratio of 18. We measured line blueshifts of several kilometers per second and posttransit absorption, which we interpret as the escape of part of the atmosphere trailing behind the planet in comet-like form.
WOS关键词	BRIGHT K-STAR ; ORBITAL MOTION ; GIANT PLANET ; HOT ; TRANSITS ; ANGSTROM ; WATER ; LINE ; SPIN
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	AMER ASSOC ADVANCEMENT SCIENCE
WOS记录号	WOS:000453845000055
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/20585]
专题	中国科学院紫金山天文台
通讯作者	Nortmann, Lisa
作者单位	1.Inst Astrofis Canarias, Via Lactea S-N, Tenerife 38205, Spain 2.Univ La Laguna, Dept Astrofis, Tenerife 38206, Spain 3.Univ Hamburg, Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany 4.CSIC, European Space Astron Ctr Campus, INTA, Ctr Astrobiol, Camino Castillo S-N, Madrid 28692, Spain 5.Leiden Univ, Leiden Observ, Postbus 9513, NL-2300 RA Leiden, Netherlands 6.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany 7.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing 210008, Jiangsu, Peoples R China 8.Georg August Univ, Inst Astrophys, D-37077 Gottingen, Germany 9.CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain 10.Univ Complutense Madrid, Dept Astrofis & Ciencias Atmosfera, Fac Ciencias Fis, E-28040 Madrid, Spain
推荐引用方式 GB/T 7714	Nortmann, Lisa,Palle, Enric,Salz, Michael,et al. Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b[J]. SCIENCE,2018,362(6421):1388-+.
APA	Nortmann, Lisa.,Palle, Enric.,Salz, Michael.,Sanz-Forcada, Jorge.,Nagel, Evangelos.,...&Zapatero Osorio, Maria R..(2018).Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b.SCIENCE,362(6421),1388-+.
MLA	Nortmann, Lisa,et al."Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b".SCIENCE 362.6421(2018):1388-+.