Published 2026 | Version 1
Poster Open

The NUV as a Fulcrum for Understanding Ultraviolet and P2021 Optical Stellar Flares

Authors/Creators

  • 1. ROR icon Space Telescope Science Institute
  • 2. ROR icon Johns Hopkins University
  • 3. Department of Astrophysical and Planetary Sciences, University of Colorado Boulder, Boulder CO USA
  • 4. Laboratory for Atmospheric and Planetary Sciences, University of Colorado Boulder, Boulder CO USA
  • 5. National Solar Observatory, University of Colorado Boulder, Boulder CO USA
  • 6. Rice Space Institute, Rice University, Houston TX USA
  • 7. ROR icon Lowell Observatory
  • 8. ROR icon National Astronomical Observatory of Japan
  • 9. Heliophysics Division, NASA Goddard Space Flight Center, Greenbelt, MD USA
  • 10. The Catholic University of America, Washington DC USA
  • 11. The Hakubi Center for Advanced Research,
  • 12. ROR icon University of California, Santa Cruz

Description

The NUV spectral range provides a unique view into the lower chromosphere of stars. In spectral studies of variable magnetic reconnection flares, this is a crucial region connecting the optical and far-ultraviolet spectral regions and plays a crucial role in driving chemical reactions in planetary atmospheres. Despite its importance, it has been understudied relative to its neighbors on the electromagnetic spectrum. We report on outcomes obtained from a large Treasury HST Project, and the wide range of accompanying multi-wavelength data (TESS, NICER, SwiM, ground-based optical). Spanning two days of exposure time, this is the largest sensitive investigation of time-resolved spectroscopic NUV data on stellar flares to date, with a total of 79 flares detected. Using this unique wavelength coverage, we challenge previous physical assumptions about stellar flares and explore their astrobiological impacts.

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Additional details

Related works

Is described by
Other: https://sandbox.posters.science/discover/26732 (URL)

Dates

Submitted
2026-08-17
Submitted to Zenodo through Posters.science