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Detection of hydrocarbons in Titan using high-resolution cross-correlation spectroscopy — arXiv:2609.03975

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.03975
License (as archived): CC0-1.0
Archived: 2026-10-17T03:12:44.854Z
SHA-256 of the archived text: 07755c706838b62d658fc7337e82d5a414ee010436328e4d13de32d06288bf8a
Stable URL of this page: https://metraipolis.com/documento/dc_88da586caeef

How to cite

Detection of hydrocarbons in Titan using high-resolution cross-correlation spectroscopy — arXiv:2609.03975 — arXiv (en), https://arxiv.org/abs/2609.03975 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_88da586caeef (Metraipolis archive dc_88da586caeef, sha256 07755c706838b62d658fc7337e82d5a414ee010436328e4d13de32d06288bf8a)

BibTeX

@misc{dc88da586caeef,
  title = {Detection of hydrocarbons in Titan using high-resolution cross-correlation spectroscopy — arXiv:2609.03975},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.03975},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_88da586caeef; sha256 07755c706838b62d658fc7337e82d5a414ee010436328e4d13de32d06288bf8a},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.03975. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

High-resolution cross-correlation spectroscopy (HRCCS) is a powerful technique for detecting molecules whose individual spectral lines are too weak to be identified directly, but its sensitivity is limited by the availability and quality of high-resolution opacity data. Many molecules of atmospheric and astrobiological interest lack complete line lists, restricting traditional template-based searches. In this work, we use Titan as a controlled testbed to develop and validate a new cross-section-based methodology for HRCCS template construction. We analyse K-band CRIRES+ observations of Titan (1.99 - 2.48 {\mu}m), and compute cross-correlation functions using both line-by-line and cross-section-based templates. Our analysis recovers known hydrocarbons such as methane (CH4) and acetylene (C2H2), and yields the first HRCCS detection of ethane (C2H6) with a significance of SNRpeak = 5.17 {\pm} 0.07. The ethane detection was made possible exclusively through cross-section-based templates, as no high-resolution line list currently exists for this molecule. These results demonstrate that cross-section-based template construction is a practical and powerful strategy for extending HRCCS to molecules that currently lack reliable line lists, and establish Titan as a benchmark for calibrating molecular detection techniques that can be applied to both solar system and exoplanet atmospheres. Future applications of this approach to other ground-based high-resolution spectrographs, as well as to JWST's highest-resolution modes and next-generation facilities such as the ELT, could significantly expand the inventory of molecules detectable in planetary atmospheres.

Tema degli esploratori: terra, clima ed energia (retro-catalogo arXiv: annunci del 2026-09-04 in physics.ao-ph).
Categorie arXiv: Earth and Planetary Astrophysics (astro-ph.EP) ; Instrumentation and Methods for Astrophysics (astro-ph.IM); Solar and Stellar Astrophysics (astro-ph.SR); Atmospheric and Oceanic Physics (physics.ao-ph); Space Physics (physics.space-ph).
Pagina del lavoro: https://arxiv.org/abs/2609.03975 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-17T03:02:30.080Z dalla pagina https://arxiv.org/catchup/physics.ao-ph/2026-09-04?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).