J/A+A/668/A17 CHEOPS photometry of WASP-43 (Scandariato+, 2022)
Phase curve and geometric albedo of WASP-43b measured with CHEOPS, TESS, and
HST WFC3/UVIS.
Scandariato G., Singh V., Kitzmann D., Lendl M., Brandeker A., Bruno G.,
Bekkelien A., Benz W., Gutermann P., Maxted P.F.L., Bonfanti A., Charnoz S.,
Fridlund M., Heng K., Hoyer S., Pagano I., Persson C.M., Salmon S.,
Van Grootel V., Wilson T.G., Asquier J., Bergomi M., Gambicorti L.,
Hasiba J., Alibert Y., Alonso R., Anglada G., Barczy T.,
Barrado y Navascues D., Barros S.C.C., Baumjohann W., Beck M., Beck T.,
Billot N., Bonfils X., Broeg C., Cabrera J., Collier Cameron A.,
Csizmadia Sz., Davies M.B., Deleuil M., Deline A., Delrez L., Demangeon O.,
Demory B.-O., Erikson A., Fortier A., Fossati L., Gandolfi D., Gillon M.,
Guedel M., Isaak K.G., Kiss L.L., Laskar J., Lecavelier des Etangs A.,
Lovis C., Magrin D., Nascimbeni V., Olofsson G., Ottensamer R., Palle E.,
Parviainen H., Peter G., Piotto G., Pollacco D., Queloz D., Ragazzoni R.,
Rando N., Rauer H., Ribas I., Santos N.C., Segransan D., Serrano L.M.,
Simon A.E., Smith A.M.S., Sousa S.G., Steller M., Szabo Gy.M., Thomas N.,
Udry S., Ulmer B., Walton N.
<Astron. Astrophys. 668, A17 (2022)>
=2022A&A...668A..17S 2022A&A...668A..17S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Stars, late-type ; Exoplanets ;
Photometry ; Optical
Keywords: techniques: photometric - planets and satellites: atmospheres -
planets and satellites: detection -
planets and satellites: gaseous planets -
planets and satellites: individual: WASP-43b
Abstract:
Observations of the phase curves and secondary eclipses of extrasolar
planets provide a window on the composition and thermal structure of
the planetary atmospheres. For example, the photometric observations
of secondary eclipses lead to the measurement of the planetary
geometric albedo A_g, which is an indicator of the presence of clouds
in the atmosphere.We aimed to measure the Ag in the optical domain of
WASP-43b, a moderately irradiated giant planet with an equilibrium
temperature of ∼1400K .To this purpose, we analyzed the secondary
eclipse light curves collected by CHEOPS, together with TESS
observations of the system and the publicly available photometry
obtained with HST WFC3/UVIS. We also analyze the archival infrared
observations of the eclipses and retrieve the thermal emission
spectrum of the planet. By extrapolating the thermal spectrum to the
optical bands, we correct the optical eclipses for thermal emission
and derive the optical Ag. The fit of the optical data led to a
marginal detection of the phase curve signal, characterized by an
amplitude of 160±60ppm and 80+60-50ppm in the CHEOPS and TESS
passband respectively, with an eastward phase shift of ∼50 degree
(1.5σ detection). The analysis of the infrared data suggests a
non-inverted thermal profile and solar-like metallicity. The
combination of optical and infrared analysis allows us to derive an
upper limit for the optical albedo of Ag<0.087 with a confidence of
99.9%. Our analysis of the atmosphere of WASP-43b places this planet
in the sample of irradiated hot Jupiters, with monotonic
temperature-pressure profile and no indication of condensation of
reflective clouds on the planetary dayside.In this table we report the
CHEOPS photometry of WASP-43 extracted by the PIPE pipeline and
detrended as discussed in the paper.
Description:
CHEOPS photometry of WASP-43 extracted by the PIPE photometry and
detrended as described in the paper.
Objects:
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RA (2000) DE Designation(s)
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10 19 38.01 -09 48 22.6 WASP-43 = TIC 36734222
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
lc.dat 101 2478 CHEOPS photometry of WASP-43 extracted by the
PIPE photometry and detrended
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See also:
J/A+A/563/A41 : WASP-43 OSIRIS transmission spectroscopy (Murgas+, 2014)
J/AJ/161/269 : WASP-43 HST WFC3/UVIS normalized light curve (Fraine+, 2021)
J/AJ/162/210 : Transit Time Vartiations (TTVs) of WASP-43 (Davoudi+, 2021)
Byte-by-byte Description of file: lc.dat
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Bytes Format Units Label Explanations
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1 I1 --- ID [1/9] Visit ID
3- 20 F18.10 d BJD Timestamps of the light curve (TDB)
22- 39 F18.10 e- Flux Photometry extracted by the PIPE pipeline
41- 58 F18.13 e- e_Flux Photometric uncertainties on Flux
60- 61 I2 --- Flag [0/24] Quality flag assigned by the pipeline
65- 81 F17.15 --- NFlux ? Light curve after detrending and normalization
85-101 F17.15 --- e_NFlux ? Photometric uncertainties on nFlux
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Acknowledgements:
Gaetano Scandariato, gaetano.scandariato(at)inaf.it
(End) Patricia Vannier [CDS] 09-Sep-2022