Increasing solar chromosphere line intensities with solar activity
Conference
·
· Adv. Space Res.; (United States)
OSTI ID:5546205
Solar activity is characterized either by sunspots or by plages. Sunspots are detected in the continuum visible as dark features. Plages are defined in chromospheric lines such as CaII H and K or HI H-alpha by brightness enhancements. Chromospheric activity is an important parameter for the knowledge of the equilibrium input and output energy of the outer solar atmosphere. The OSO-8/L.P.S.P.-multichannel experiment has recorded simultaneous chromospheric profiles in H and K CaII, h and k MgII, L-alpha and L-beta HI lines. Those lines are formed from the temperature minimum (4200 K) to the higher part of the chromosphere (30000 K). A data set recorded over a quiet sun, plage, penumbra, and filament is presented hereafter. The observations, data reduction, and calibration are described. Then a comparison between line intensities is made and results are discussed.
- Research Organization:
- Laboratoire de Physique Stellaire et Planetaire, Verrieres-le-Buisson, Essonne, France
- OSTI ID:
- 5546205
- Report Number(s):
- CONF-8406167-
- Conference Information:
- Journal Name: Adv. Space Res.; (United States) Journal Volume: 4
- Country of Publication:
- United States
- Language:
- English
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