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The GTC exoplanet transit spectroscopy survey VI. Detection of sodium in WASP-52b's cloudy atmosphere
Chen, G.1,2,3; Palle, E.1,2; Nortmann, L.1,2; Murgas, F.1,2; Parviainen, H.1,2; Nowak, G.1,2
2017-04-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN1432-0746
Volume600Pages:6
Corresponding AuthorChen, G.(gchen@iac.es)
AbstractWe report the first detection of sodium absorption in the atmosphere of the hot Jupiter WASP-52b. We observed one transit of WASP-52b with the low-resolution Optical System for Imaging and low-Intermediate-Resolution Integrated Spectroscopy (OSIRIS) at the 10.4 m Gran Telescopio Canarias (GTC). The resulting transmission spectrum, covering the wavelength range from 522 nm to 903 nm, is flat and featureless, except for the significant narrow absorption signature at the sodium doublet, which can be explained by an atmosphere in solar composition with clouds at 1 mbar. A cloud-free atmosphere is stringently ruled out. By assessing the absorption depths of sodium in various bin widths, we find that temperature increases towards lower atmospheric pressure levels, with a positive temperature gradient of 0.88 +/- 0.65 K km(-1), possibly indicative of upper atmospheric heating and a temperature inversion.
Keywordplanetary systems planets and satellites: individual: WASP-52b planets and satellites: atmospheres techniques: spectroscopic
DOI10.1051/0004-6361/201730736
WOS KeywordTRANSMISSION SPECTROSCOPY ; HD 189733B ; GIANT PLANETS ; LIGHT CURVES ; HEAVY-ATOMS ; SPECTRA ; ESCAPE ; MODEL ; IONOSPHERE ; AERONOMY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000400754000155
PublisherEDP SCIENCES S A
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23058
Collection中国科学院紫金山天文台
Corresponding AuthorChen, G.
Affiliation1.Inst Astrofis Canarias, Via Lactea S-N, Tenerife 38205, Spain
2.Univ La Laguna, Dept Astrofis, San Cristobal la Laguna, Spain
3.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Chen, G.,Palle, E.,Nortmann, L.,et al. The GTC exoplanet transit spectroscopy survey VI. Detection of sodium in WASP-52b's cloudy atmosphere[J]. ASTRONOMY & ASTROPHYSICS,2017,600:6.
APA Chen, G.,Palle, E.,Nortmann, L.,Murgas, F.,Parviainen, H.,&Nowak, G..(2017).The GTC exoplanet transit spectroscopy survey VI. Detection of sodium in WASP-52b's cloudy atmosphere.ASTRONOMY & ASTROPHYSICS,600,6.
MLA Chen, G.,et al."The GTC exoplanet transit spectroscopy survey VI. Detection of sodium in WASP-52b's cloudy atmosphere".ASTRONOMY & ASTROPHYSICS 600(2017):6.
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