Preliminary results from the orbiting solar observatory 8: Persistent velocity fields in the chromosphere and transition region
Journal Article
·
· Astrophys. J., Lett.; (United States)
Velocity images, or tachograms, of the solar chromosphere and chromosphere-corona transition region were made by measuring the Si II 1816.93 A chromospheric line and the Si IV 1393.8 A transition region line with the University of Colorado spectrometer aboard OSO-8. Persistent flows are indicated in both active and quiet regions of the solar atmosphere. In quiet regions, areas of enhanced emission (the chromospheric network) are apparently systematically redshifted with respect to the areas of lower intensity. This correlation does not hold in active regions, where long-lived downflows into sunspots have been observed. (AIP)
- Research Organization:
- Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder
- OSTI ID:
- 7327963
- Journal Information:
- Astrophys. J., Lett.; (United States), Journal Name: Astrophys. J., Lett.; (United States) Vol. 210:2; ISSN AJLEA
- Country of Publication:
- United States
- Language:
- English
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