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Main Authors: A-thano, Napaporn, Awiphan, Supachai, Kerins, Eamonn, Priyadarshi, Akshay, McDonald, Iain, Jiang, Ing-Guey, Joshi, Yogesh C., Yang, Fan, Janiak, Ida, Munsaket, Patcharawee, Qadir, Yasir Abdul, Rattanamala, Ronnakrit, Tasuya, Orarik, Boonsoy, Ekburus, Sanguansak, Nuanwan, Rattanasai, Rattiyakorn, Padjaroen, Thammasorn, Komonjinda, Siramas, Pichadee, Sawatkamol, Sudsap, Ananpol, Chandaiam, Smanchan, Choonhakit, Boonyarit, Wutsang, Suwanit, Dhillon, Vik S
Format: Preprint
Published: 2026
Subjects:
Earth and Planetary Astrophysics
Online Access:https://arxiv.org/abs/2604.05907
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Table of Contents:
  • 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 \emph{TESS}, \emph{HST}, and \emph{JWST}, to refine the planetary parameters of WASP-43~b. A total of 188 mid-transit times, measured with \texttt{TransitFit}, were analyzed for potential timing variations. The transit timing variations do not show any significant evidence of orbital decay. Atmospheric retrievals using \emph{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, \emph{TESS}, and \emph{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.

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