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March 7, 2026Monthly Notices of the Royal Astronomical SocietyOpen Access

Detection of C3 in Titan with VLT-ESPRESSO

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Authors

RRRafael Rianço-SilvaUniversity of LisbonPMPedro MachadoUniversity of LisbonPRPatrice RannouUniversité Grenoble Alpes

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Implication

Optical spectroscopy detects C3 in Titan's atmosphere, indicating complex chemistry in its mesosphere.

Key Points

  • The aim is to confirm the presence of C3 in Titan's atmosphere and analyze its abundance using high-resolution spectroscopy.
  • Conducted ultra-high-resolution optical spectroscopy with VLT-ESPRESSO.
  • Compared observed spectra with model spectra at varying C3 abundances.
  • Utilized χ2 curve analysis for spectral feature assessment.
  • Employed Bayesian Monte-Carlo-Markov-Chain (MCMC) fitting for abundance estimation.
  • Achieved an 8σ detection of C3 at 4050Å in Titan's atmosphere.
  • Estimated C3 column density at N = (1.47 ± 0.30) × 10^13 cm−2.
  • Findings are consistent with previously predicted C3 abundances, supporting complex atmospheric chemistry.

Cite This Study

Rianço-Silva et al. (2026) studied this question.

synapsesocial.com/papers/69abc2725af8044f7a4ec05bhttps://doi.org/10.1093/mnras/stag447
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