Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b
Nortmann, Lisa1,2; Palle, Enric1,2; Salz, Michael3; Sanz-Forcada, Jorge4; Nagel, Evangelos3; Alonso-Floriano, F. Javier5; Czesla, Stefan3; Yan, Fei6; Chen, Guo1,2,7; Snellen, Ignas A. G.5; Zechmeister, Mathias8; Schmitt, Juergen H. M. M.3; Lopez-Puertas, Manuel9; Casasayas-Barris, Nuria1,2; Bauer, Florian F.8,9; Amado, Pedro J.9; Caballero, Jose A.4; Dreizler, Stefan8; Henning, Thomas6; Lampon, Manuel9; Montes, David10; Molaverdikhani, Karan6; Quirrenbach, Andreas11; Reiners, Ansgar8; Ribas, Ignasi12,13; Sanchez-Lopez, Alejandro9; Schneider, P. Christian3; Zapatero Osorio, Maria R.14
Source PublicationSCIENCE
Corresponding AuthorNortmann, Lisa(
AbstractHot 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.
Indexed BySCI
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000453845000055
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Document Type期刊论文
Corresponding AuthorNortmann, Lisa
Affiliation1.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
11.Heidelberg Univ, Zentrum Astron, Landessternwarte, Konigstuhl 12, D-69117 Heidelberg, Germany
12.Campus Univ Autonoma Barcelona, CSIC, Inst Ciencies Espai, C Can Magrans S-N, Barcelona 08193, Spain
13.Inst Estudis Espacials Catalunya, Barcelona 08034, Spain
14.CSIC, INTA, Ctr Astrobiol, Crta Ajalvir Km 4, E-28850 Madrid, Spain
Recommended Citation
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-+.
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