Non-LTE hydrogen-line formation in moving prominences
- Author
- Rompolt, B.
- Published
- Dec 1, 1986.
- Physical Description
- 1 electronic document
- Additional Creators
- Heinzel, P.
Online Version
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- Restrictions on Access
- Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access - Summary
- The behavior of hydrogen-line brightness variations, depending on the prominence-velocity changes were investigated. By solving the NON-Local thermodynamic equilibrium (LTE) problem for hydrogen researchers determine quantitatively the effect of Doppler brightening and/or Doppler dimming (DBE, DDE) in the lines of Lyman and Balmer series. It is demonstrated that in low-density prominence plasmas, DBE in H alpha and H beta lines can reach a factor of three for velocities around 160 km/sec, while the L alpha line exhibits typical DDE. L beta brightness variations follow from a combined DBE in the H alpha and DDE in L alpha and L beta itself, providing that all relevant multilevel interlocking processes are taken into account.
- Other Subject(s)
- Collection
- NASA Technical Reports Server (NTRS) Collection.
- Note
- Document ID: 19870011462.
Accession ID: 87N20895.
NASA. Goddard Space Flight Center Coronal and Prominence Plasmas; p 163-167. - Terms of Use and Reproduction
- No Copyright.
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