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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/32558
Title: The Dark World: A Tale of WASP-43b in Reflected Light with HST WFC3/UVIS
Authors: Fraine, Jonathan
Mayorga, L. C.
Stevenson, Kevin B.
Lewis, Nikole K.
Kataria, Tiffany
Bean, Jacob L.
BRUNO, GIOVANNI 
Fortney, Jonathan J.
Kreidberg, Laura
Morley, Caroline V.
Mouawad, Nelly C.
Todorov, Kamen O.
Parmentier, Vivien
Wakeford, Hannah
Feng, Y. Katherina
Kilpatrick, Brian M.
Line, Michael R.
Issue Date: 2021
Journal: THE ASTRONOMICAL JOURNAL 
Number: 161
Issue: 6
First Page: 269
Abstract: Optical reflected light eclipse observations provide a direct probe of exoplanet scattering properties, such as from aerosols. We present here the photometric reflected light observations of WASP-43b using the Hubble Space Telescope (HST) WFC3/UVIS instrument with the F350LP filter (346-822 nm) encompassing the entire optical band. This is the first reflected light photometric eclipse using UVIS in scanning mode; as such, we further detail our scanning extraction and analysis pipeline Arctor. Our HST WFC3/UVIS eclipse light curve for WASP-43b derived a 3σ upper limit of 67 ppm on the eclipse depth, which implies that WASP-43b has a very dark dayside atmosphere. With our atmospheric modeling campaign, we compared our reflected light constraints with predictions from global circulation and cloud models benchmarked with HST and Spitzer observations of WASP-43b. We infer that we do not detect clouds on the dayside within the pressure levels probed by HST WFC3/UVIS with the F350LP filter (P > 1 bar). This is consistent with the general circulation model predictions based on previous WASP-43b observations. Dayside emission spectroscopy results from WASP-43b with HST and Spitzer observations are likely to not be significantly affected by contributions from cloud particles.
URI: http://hdl.handle.net/20.500.12386/32558
URL: https://iopscience.iop.org/article/10.3847/1538-3881/abe8d6
ISSN: 0004-6256
DOI: 10.3847/1538-3881/abe8d6
Bibcode ADS: 2021AJ....161..269F
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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