The Transit Timing and Transmission Spectrum of Hot Jupiter WASP-43 b from a Decade of Multiband Transit follow-up Observations
Year: 2026
Type: article
Abstract: We present a new set of 35 transit light curves of the hot Jupiter WASP-43 b, obtained through the SPEARNET network. These datasets were analyzed together with previously published ground-based observations, as well as space-based data from TESS, Hubble Space Telescope (HST), and JWST, to refine the planetary parameters of WASP-43 b. A total of 188 midtransit times, measured with TransitFit , were analyzed for potential timing variations. The transit timing variations do not show any significant evidence of orbital decay. Atmospheric retrievals using HST/WFC3 G141 transmission spectra suggest that higher-temperature solutions are associated with higher water abundances. However, when these data are combined with observations from ground-based telescopes, TESS, and JWST, the increased modeling complexity across the broad wavelength baseline presents significant challenges for atmospheric characterization. These results highlight that high-precision, multi-instrument datasets will be necessary to break existing degeneracies in the atmospheric modeling of this target in the future.
Source: The Astronomical Journal
Authors: Napaporn A-thano, Supachai Awiphan, Eamonn Kerins, Akshay Priyadarshi, Iain McDonald, Ing-Guey Jiang, Yogesh C. Joshi, Fan Yang, Ida Janiak, Patcharawee Munsaket, Yasir Abdul Qadir, Ronnakrit Rattanamala, Orarik Tasuya, Ekburus Boonsoy, Nuanwan Sanguansak, Rattiyakorn Rattanasai, Thammasorn Padjaroen, Siramas Komonjinda, Sawatkamol Pichadee, Ananpol Sudsap, Smanchan Chandaiam, Boonyarit Choonhakit, Suwanit Wutsang, Vik S Dhillon
Institutions: National Astronomical Research Institute of Thailand, University of Manchester, The Open University, National Tsing Hua University, Aryabhatta Research Institute of Observational Sciences, Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, Astrophysique, Instrumentation et Modélisation, Institut de Recherche sur les Lois Fondamentales de l'Univers, Suranaree University of Technology, University of Turku, Nakhon Ratchasima Rajabhat University, Chiang Mai University, National Science and Technology Development Agency, Thailand Science Park, Instituto de Astrofísica de Canarias, University of Sheffield
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
Award: G6253640670
OpenAlex ID: W7160328916