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Feature-rich transmission spectrum for WASP-127b Cloud-free skies for the puffiest known super-Neptune?
Palle, E.1,2; Chen, G.1,2,3; Prieto-Arranz, J.1,2; Nowak, G.1,2; Murgas, F.1,2; Nortmann, L.1,2; Pollacco, D.4; Lam, K.4; Montanes-Rodriguez, P.1,2; Parviainen, H.1,2; Casasayas-Barris, N.1,2
2017-06-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN1432-0746
Volume602Pages:5
Corresponding AuthorPalle, E.(epalle@iac.es)
AbstractContext. WASP-127b is a planet with one of the lowest densities discovered to date. With a sub-Saturn mass (M-p = 0.18 +/- 0.02 M-J) and super-Jupiter radius (R-p = 1.37 +/- 0.04 R-J), it orbits a bright G5 star that is about to leave the main-sequence. Aims. We aim to explore the atmosphere of WASP-127b in order to retrieve its main atmospheric components, and to find hints for its intriguing inflation and evolutionary history. Methods. We used the ALFOSC spectrograph at the NOT telescope to observe a low-resolution (R similar to 330, seeing limited) long-slit spectroscopic time series during a planetary transit, and present here the first transmission spectrum for WASP-127b. Results. We find a strong Rayleigh slope at blue wavelengths and a hint of Na absorption, although the quality of the data does not allow us to claim a detection. At redder wavelengths the absorption features of TiO and VO are the best explanation to fit the data. Conclusions. Although observations with a higher signal-to-noise ratio are needed to conclusively confirm the absorption features, WASP-127b seems to posses a cloud-free atmosphere and is one of the best targets on which to perform further characterization studies in the near future.
Keywordplanetary systems planets and satellites: individual: WASP-127b planets and satellites: atmospheres techniques: spectroscopic
DOI10.1051/0004-6361/201731018
WOS KeywordHOT JUPITERS ; GIANT PLANETS ; LIGHT CURVES ; HD 209458B ; SPECTROSCOPY ; ATMOSPHERES ; EXOPLANETS ; MODEL ; MASS ; WINDS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000404648300134
PublisherEDP SCIENCES S A
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22662
Collection中国科学院紫金山天文台
Corresponding AuthorPalle, E.
Affiliation1.Inst Astrofis Canarias, Via Lactea S-N, Tenerife 38205, Spain
2.Univ La Laguna, Dept Astrofis, San Cristobal De La Lagu 38200, Spain
3.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing 210008, Jiangsu, Peoples R China
4.Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
Recommended Citation
GB/T 7714
Palle, E.,Chen, G.,Prieto-Arranz, J.,et al. Feature-rich transmission spectrum for WASP-127b Cloud-free skies for the puffiest known super-Neptune?[J]. ASTRONOMY & ASTROPHYSICS,2017,602:5.
APA Palle, E..,Chen, G..,Prieto-Arranz, J..,Nowak, G..,Murgas, F..,...&Casasayas-Barris, N..(2017).Feature-rich transmission spectrum for WASP-127b Cloud-free skies for the puffiest known super-Neptune?.ASTRONOMY & ASTROPHYSICS,602,5.
MLA Palle, E.,et al."Feature-rich transmission spectrum for WASP-127b Cloud-free skies for the puffiest known super-Neptune?".ASTRONOMY & ASTROPHYSICS 602(2017):5.
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