Feature-rich transmission spectrum for WASP-127b Cloud-free skies for the puffiest known super-Neptune?

doi:10.1051/0004-6361/201731018

	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
刊名	ASTRONOMY & ASTROPHYSICS
	2017-06-01
卷号	602 页码:5
关键词	planetary systems planets and satellites: individual: WASP-127b planets and satellites: atmospheres techniques: spectroscopic
ISSN号	1432-0746
DOI	10.1051/0004-6361/201731018
通讯作者	Palle, E.(epalle@iac.es)
英文摘要	Context. 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.
WOS关键词	HOT JUPITERS ; GIANT PLANETS ; LIGHT CURVES ; HD 209458B ; SPECTROSCOPY ; ATMOSPHERES ; EXOPLANETS ; MODEL ; MASS ; WINDS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000404648300134
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/22661]
专题	中国科学院紫金山天文台
通讯作者	Palle, E.
作者单位	1.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
推荐引用方式 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.