Community targets for JWST's early release science program: evaluation of WASP-63b

Autor: Nikku Madhusudhan, Nikole K. Lewis, Jeff A. Valenti, Ryan J. MacDonald, Jasmina Blecic, Jessica Krick, Giovanni Bruno, Caroline V. Morley, Michael R. Line, Charles Beichman, Brian Kilpatrick, Avi Mandell, Drake Deming, Kevin B. Stevenson, Kevin Heng, Patricio Cubillos, Ingo Waldmann, Jacob L. Bean, Joshua D. Lothringer, Gregory S. Tucker, Jonathan Fraine, Adam Burrows, Hannah R. Wakeford, Vivien Parmentier
Přispěvatelé: Kilpatrick, BM [0000-0003-4220-600X], Cubillos, PE [0000-0002-1347-2600], Stevenson, KB [0000-0002-7352-7941], Lewis, NK [0000-0002-8507-1304], Wakeford, HR [0000-0003-4328-3867], Macdonald, RJ [0000-0003-4816-3469], Madhusudhan, N [0000-0002-4869-000X], Blecic, J [0000-0002-0769-9614], Burrows, A [0000-0002-3099-5024], Heng, K [0000-0003-1907-5910], Line, MR [0000-0002-2338-476X], Morley, CV [0000-0002-4404-0456], Parmentier, V [0000-0001-9521-6258], Tucker, GS [0000-0002-6954-6947], Waldmann, IP [0000-0002-4205-5267], Bean, JL [0000-0003-4733-6532], Lothringer, JD [0000-0003-3667-8633], Mandell, AM [0000-0002-8119-3355], Apollo - University of Cambridge Repository
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Kilpatrick, Brian M.; Cubillos, Patricio E.; Stevenson, Kevin B.; Lewis, Nikole K.; Wakeford, Hannah R.; MacDonald, Ryan J.; Madhusudhan, Nikku; Blecic, Jasmina; Bruno, Giovanni; Burrows, Adam; Deming, Drake; Heng, Kevin; Line, Michael R.; Morley, Caroline V.; Parmentier, Vivien; Tucker, Gregory S.; Valenti, Jeff A.; Waldmann, Ingo P.; Bean, Jacob L.; Beichman, Charles; ... (2018). Community Targets of JWST ’s Early Release Science Program: Evaluation of WASP-63b. The astronomical journal, 156(3), p. 103. American Astronomical Society 10.3847/1538-3881/aacea7
The Astronomical Journal
ISSN: 0004-637X
0067-0049
1538-3881
1538-3873
Popis: We present observations of WASP-63b by the Hubble Space Telescope (HST) as part of "A Preparatory Program to Identify the Single Best Transiting Exoplanet for JWST Early Release Science". WASP-63b is one of the community targets under consideration for the James Webb Space Telescope (JWST) Early Release Science (ERS) program. We present a spectrum derived from a single observation by HST Wide Field Camera 3 in the near infrared. We engaged groups across the transiting exoplanet community to participate in the analysis of the data and present results from each. There is general agreement amongst all results that we find an H2O absorption feature with 3.5-4.0 sigma significance. However, the feature is muted in comparison to a clear atmosphere at solar composition. Although the detection of the water feature is robust, the reasons for the muting of this feature are ambiguous due to a degeneracy between clouds and composition. The data does not yield robust detections of any molecular species other than H2O. The group was motivated to perform an additional set of retrieval exercises to investigate an apparent bump in the spectrum at ~ 1.55 um. We explore possible disequilibrium chemistry and find this feature is consistent with super-solar HCN abundance but it is questionable if the required mixing ratio of HCN is chemically and physically plausible. The ultimate goal of this study is to vet WASP-63b as a potential community target to best demonstrate the capabilities and systematics of JWST instruments for transiting exoplanet science. In the case of WASP-63b, the presence of a detectable water feature indicates that WASP-63b remains a plausible target for ERS observations.
repaired broken citations
Databáze: OpenAIRE
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