PMO OpenIR
The GTC exoplanet transit spectroscopy survey IX. Detection of haze, Na, K, and Li in the super-Neptune WASP-127b
Chen, G.1,2,3; Palle, E.1,2; Welbanks, L.4; Prieto-Arranz, J.1,2; Madhusudhan, N.4; Gandhi, S.4; Casasayas-Barris, N.1,2; Murgas, F.1,2; Nortmann, L.1,2; Crouzet, N.1,2; Parviainen, H.1,2; Gandolfi, D.5
2018-08-29
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN1432-0746
Volume616Pages:14
Corresponding AuthorChen, G.(gchen@iac.es)
AbstractExoplanets with relatively clear atmospheres are prime targets for detailed studies of chemical compositions and abundances in their atmospheres. Alkali metals have long been suggested to exhibit broad wings due to pressure broadening, but most of the alkali detections only show very narrow absorption cores, probably because of the presence of clouds. We report the strong detection of the pressure-broadened spectral profiles of Na, K, and Li absorption in the atmosphere of the super-Neptune WASP-127b, at 4.1 sigma, 5.0 sigma, and 3.4 sigma, respectively. We performed a spectral retrieval modeling on the high-quality optical transmission spectrum newly acquired with the 10.4m Gran Telescopio Canarias (GTC), in combination with the re-analyzed optical transmission spectrum obtained with the 2.5 m Nordic Optical Telescope (NOT). By assuming a patchy cloudy model, we retrieved the abundances of Na, K, and Li, which are super-solar at 3.7 sigma for K and 5.1 sigma for Li (and only 1.8 sigma for Na). We constrained the presence of haze coverage to be around 52%. We also found a hint of water absorption, but cannot constrain it with the global retrieval owing to larger uncertainties in the probed wavelengths. WASP-127b will be extremely valuable for atmospheric characterization in the era of James Webb Space Telescope.
Keywordplanetary systems planets and satellites: individual: WASP-127b planets and satellites: atmospheres techniques: spectroscopic
DOI10.1051/0004-6361/201833033
WOS KeywordLITHIUM DEPLETION ; HOT-JUPITER ; SPECTRA ; ATMOSPHERES ; WATER ; RETRIEVAL ; CHEMISTRY ; ABUNDANCE ; CLOUDS ; STARS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000442982500001
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/21480
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
4.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England
5.Univ Torino, Dipartimento Fis, Via P Giuria 1, I-10125 Turin, Italy
Recommended Citation
GB/T 7714
Chen, G.,Palle, E.,Welbanks, L.,et al. The GTC exoplanet transit spectroscopy survey IX. Detection of haze, Na, K, and Li in the super-Neptune WASP-127b[J]. ASTRONOMY & ASTROPHYSICS,2018,616:14.
APA Chen, G..,Palle, E..,Welbanks, L..,Prieto-Arranz, J..,Madhusudhan, N..,...&Gandolfi, D..(2018).The GTC exoplanet transit spectroscopy survey IX. Detection of haze, Na, K, and Li in the super-Neptune WASP-127b.ASTRONOMY & ASTROPHYSICS,616,14.
MLA Chen, G.,et al."The GTC exoplanet transit spectroscopy survey IX. Detection of haze, Na, K, and Li in the super-Neptune WASP-127b".ASTRONOMY & ASTROPHYSICS 616(2018):14.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Chen, G.]'s Articles
[Palle, E.]'s Articles
[Welbanks, L.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Chen, G.]'s Articles
[Palle, E.]'s Articles
[Welbanks, L.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Chen, G.]'s Articles
[Palle, E.]'s Articles
[Welbanks, L.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.