Time-resolved flare SEDs and exoplanet photochemistry and habitability; viability of life around flaring M dwarfs

Determine how fully time-resolved spectral energy distributions of stellar flares from optical to near-infrared wavelengths govern photochemical trajectories and long-term habitability in exoplanet atmospheres, and assess whether life can survive or originate within the intense, spectrally complex flare environments of common M-dwarf host stars.

Background

The paper highlights that flare SEDs, including Balmer and Paschen continua and blackbody components, are central to atmospheric chemistry and escape processes, yet remain poorly constrained due to current spectroscopic limitations.

M dwarfs exhibit frequent, energetic flares; establishing whether such environments permit atmospheric stability or even prebiotic synthesis requires high-cadence, multi-wavelength spectroscopy to reconstruct time-resolved SEDs.

References

Here are the major open questions that the next big telescope developed by ESO will address through conducting a decadal spectroscopic survey of young, active exoplanet hosts: How does the full-time-resolved SEDs of stellar flares (homogeneously from the optical to the NIR regime) control the photochemical trajectories and long-term habitability of exoplanet atmospheres? Can life survive or even originate within the intense, spectrally complex flare environment of common M dwarfs?

— Transients as Determinants of Habitability  (2512.12456 - Majidi et al., 13 Dec 2025) in Section 3 (Key Questions)