The GTC exoplanet transit spectroscopy survey IX. Detection of haze, Na, K, and Li in the super-Neptune WASP-127b
文献类型：期刊论文
| 作者 | 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 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2018-08-29 |
| 卷号 | 616页码:14 |
| 关键词 | planetary systems planets and satellites: individual: WASP-127b planets and satellites: atmospheres techniques: spectroscopic |
| ISSN号 | 1432-0746 |
| DOI | 10.1051/0004-6361/201833033 |
| 通讯作者 | Chen, G.(gchen@iac.es) |
| 英文摘要 | Exoplanets 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. |
| WOS关键词 | LITHIUM DEPLETION ; HOT-JUPITER ; SPECTRA ; ATMOSPHERES ; WATER ; RETRIEVAL ; CHEMISTRY ; ABUNDANCE ; CLOUDS ; STARS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000442982500001 |
| 出版者 | EDP SCIENCES S A |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/21479]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Chen, G. |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
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来源：紫金山天文台
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