sunset: A database of synthetic atmospheric-escape transmission spectra for nearly every transiting planet
Dion Linssen, Antonija Oklop\v{c}i\'c, Morgan MacLeod

TL;DR
This paper introduces 'sunset', a comprehensive database of synthetic atmospheric-escape transmission spectra for nearly all known transiting exoplanets, aiding target selection and understanding of atmospheric escape processes.
Contribution
The work provides the first extensive publicly available synthetic spectra database for exoplanet atmospheric escape, along with metrics for identifying promising observational targets.
Findings
Spectral line strengths do not strongly correlate with atmospheric mass-loss rates.
Weak correlation between XUV flux and helium line strength.
Synthetic spectra are generally consistent with observed metastable helium spectra.
Abstract
Studying atmospheric escape from exoplanets can provide important clues about the formation and evolution of exoplanets. Observational evidence of atmospheric escape has been obtained through transit spectroscopy in strong spectral lines of various atomic species. In recent years, the number of exoplanets that have been targeted in this way has grown rapidly, mainly by observations of the metastable helium triplet. Even with this larger sample of exoplanets, many aspects of atmospheric escape remain not fully understood, such as the role of the stellar high-energy spectrum and planetary magnetic field, highlighting the need for additional observations. This work aims to identify the best targets for observations in various spectral lines. Using the atmospheric escape code sunbather, we calculate a synthetic transmission spectrum of nearly every transiting exoplanet currently known. This…
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Taxonomy
TopicsAtmospheric Ozone and Climate · Solar and Space Plasma Dynamics
