干旱区生态环境知识资源中心(Arid): Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) VI. Non-detection of sodium with HARPS on the bloated super-Neptune WASP-127b

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DOI	10.1051/0004-6361/202039058
	Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) VI. Non-detection of sodium with HARPS on the bloated super-Neptune WASP-127b
	Seidel, J. V.; Lendl, M.; Bourrier, V.; Ehrenreich, D.; Allart, R.; Sousa, S. G.; Cegla, H. M.; Bonfils, X.; Conod, U.; Grandjean, A.; Wyttenbach, A.; Astudillo-Defru, N.; Bayliss, D.; Heng, K.; Lavie, B.; Lovis, C.; Melo, C.; Pepe, F.; Segransan, D.; Udry, S.
通讯作者	Seidel, JV
来源期刊	ASTRONOMY & ASTROPHYSICS
ISSN	0004-6361
EISSN	1432-0746
出版年	2020
卷号	643
英文摘要	WASP-127b is one of the puffiest exoplanets found to date, with a mass of only 3.4 Neptune masses, but a radius larger than that of Jupiter. It is located at the border of the Neptune desert, which describes the lack of highly irradiated Neptune-sized planets, and which remains poorly understood. Its large scale height and bright host star make the transiting WASP-127b a valuable target to characterise in transmission spectroscopy. We used combined EulerCam and TESS light curves to recalculate the system parameters. Additionally, we present an in-depth search for sodium in four transit observations of WASP-127b, obtained as part of the Hot Exoplanet Atmosphere Resolved with Transit Spectroscopy (HEARTS) survey with the High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph. Two nights from this dataset were analysed independently by another team. The team claimed a detection of sodium that is incompatible with previous studies of data from both ground and space. We show that this strong sodium detection is due to contamination from telluric sodium emissions and the low signal-to-noise ratio in the core of the deep stellar sodium lines. When these effects are properly accounted for, the previous sodium signal is reduced to an absorption of 0.46 +/- 0.20% (2.3 sigma), which is compatible with analyses of WASP-127b transits carried out with other instruments. We can fit a Gaussian to the D2 line, but the D1 line was not detected. This indicates an unusual line ratio if sodium exists in the atmosphere. Follow-up of WASP-127 at high resolution and with high sensitivity is required to firmly establish the presence of sodium and analyse its line shape.
英文关键词	planets and satellites: atmospheres planets and satellites: individual: WASP-127 b techniques: spectroscopic instrumentation: spectrographs methods: observational techniques: photometric
类型	Article
语种	英语
开放获取类型	Green Published, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000588148800002
WOS关键词	PLANET ; ABSORPTION ; PARAMETERS ; EVOLUTION ; JUPITERS ; SPECTRA ; STAR ; MASS
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327446
作者单位	[Seidel, J. V.; Lendl, M.; Bourrier, V.; Ehrenreich, D.; Cegla, H. M.; Lavie, B.; Lovis, C.; Melo, C.; Pepe, F.; Segransan, D.; Udry, S.] Univ Geneva, Observ Astron, Chemin Maillettes 51, CH-1290 Versoix, Switzerland; [Sousa, S. G.] Univ Porto, CAUP, Inst Astrofis & Ciencias Espaco, Rua Estrelas, P-4150762 Porto, Portugal; [Cegla, H. M.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England; [Bonfils, X.; Grandjean, A.; Wyttenbach, A.] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France; [Conod, U.] Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC, Canada; [Astudillo-Defru, N.] Univ Catolica Santisima Concepcion, Dept Matemat & Fis Aplicadas, Alonso Rivera 2850, Concepcion, Chile; [Heng, K.] Univ Bern, Ctr Space & Habitabil, Gesellschaftsstr 6, CH-3012 Bern, Switzerland; [Melo, C.] European Southern Observ, Alonso Cordova 3107, Vitacura, Region Metropol, Chile
推荐引用方式 GB/T 7714	Seidel, J. V.,Lendl, M.,Bourrier, V.,et al. Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) VI. Non-detection of sodium with HARPS on the bloated super-Neptune WASP-127b[J],2020,643.
APA	Seidel, J. V..,Lendl, M..,Bourrier, V..,Ehrenreich, D..,Allart, R..,...&Udry, S..(2020).Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) VI. Non-detection of sodium with HARPS on the bloated super-Neptune WASP-127b.ASTRONOMY & ASTROPHYSICS,643.
MLA	Seidel, J. V.,et al."Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) VI. Non-detection of sodium with HARPS on the bloated super-Neptune WASP-127b".ASTRONOMY & ASTROPHYSICS 643(2020).