- Abstract:
-
Models of the solar transition region made from lines other than those of helium cannot account for the strength of the helium lines. However, the collisional excitation rates of the helium resonance lines are unusually sensitive to the energy of the exciting electrons. Non-thermal motions in the transition region could drive slowly ionizing helium ions rapidly through the steep temperature gradient, exposing them to excitation by electrons characteristic of higher temperatures than those des...
Expand abstract - Publication status:
- Published
- Publisher copy:
- 10.1046/j.1365-8711.2002.05953.x
-
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- Journal:
- MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
- Volume:
- 337
- Issue:
- 2
- Pages:
- 666-676
- Publication date:
- 2002-12-05
- DOI:
- EISSN:
-
1365-2966
- ISSN:
-
0035-8711
- URN:
-
uuid:5e65fef0-86df-4c6e-b034-99bea3256642
- Source identifiers:
-
27742
- Local pid:
- pubs:27742
- Language:
- English
- Keywords:
- Copyright date:
- 2002
Journal article
Enhancement of the helium resonance lines in the solar atmosphere by suprathermal electron excitation - I. Non-thermal transport of helium ions
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