Detection of H₂ in the TWA 7 System: A Probable Circumstellar Origin

Using HST–COS far-UV spectra, we have discovered warm molecular hydrogen in the TWA 7 system. 7, a ?9 Myr old M2.5 star, has cold debris disk and previously shown no signs of accretion. Molecular is expected to be extremely rare disk. While can produced starspots or lower chromospheres cool stars such as fluxes from progressions that get pumped by wings Ly? indicate this could circumstellar thus accreting at very low levels may retain reservoir gas near environment.