Solar Limb Effect of the Spectral Lines in a Prominence Observed at the Total Eclipse in 1941

1950 ◽  
Vol 5 (2) ◽  
pp. 95-101
Author(s):  
Tutomu Tanaka ◽  
Zyun Koana
Keyword(s):  
Solar Limb ◽  
Spectral Lines ◽  
Total Eclipse ◽  
Limb Effect

Theoretical explanation of the solar limb effect

1971 ◽  
Vol 19 (6) ◽  
pp. 659-667 ◽  
Author(s):  
Cs. Ferencz ◽  
Gy. Tarcsai
Keyword(s):  
Solar Limb ◽  
Theoretical Explanation ◽  
Limb Effect

Measurement of the solar limb brightness profile at 3 millimeters during the total eclipse of 1991 July 11

1992 ◽  
Vol 400 ◽  
pp. 692 ◽  
Author(s):  
L. Belkora ◽  
G. J. Hurford ◽  
Dale E. Gary ◽  
D. P. Woody
Keyword(s):  
Solar Limb ◽  
Total Eclipse

scholarly journals Structure of sunspot light bridges in the chromosphere and transition region

2018 ◽  
Vol 609 ◽  
pp. A73 ◽  
Author(s):  
R. Rezaei
Keyword(s):  
Transition Region ◽  
Line Width ◽  
Solar Limb ◽  
Solar Radius ◽  
Spectral Lines ◽  
Quiet Sun ◽  
Hot Plasma ◽  
Emission Enhancement ◽  
Energy And Momentum ◽  
Far Ultraviolet

Context. Light bridges (LBs) are elongated structures with enhanced intensity embedded in sunspot umbra and pores. Aims. We studied the properties of a sample of 60 LBs observed with the Interface Region Imaging Spectrograph (IRIS). Methods. Using IRIS near- and far-ultraviolet spectra, we measured the line intensity, width, and Doppler shift; followed traces of LBs in the chromosphere and transition region (TR); and compared LB parameters with umbra and quiet Sun. Results. There is a systematic emission enhancement in LBs compared to nearby umbra from the photosphere up to the TR. Light bridges are systematically displaced toward the solar limb at higher layers: the amount of the displacement at one solar radius compares well with the typical height of the chromosphere and TR. The intensity of the LB sample compared to the umbra sample peaks at the middle/upper chromosphere where they are almost permanently bright. Spectral lines emerging from the LBs are broader than the nearby umbra. The systematic redshift of the Si iv line in the LB sample is reduced compared to the quiet Sun sample. We found a significant correlation between the line width of ions arising at temperatures from 3 × 104 to 1.5 × 105 K as there is also a strong spatial correlation among the line and continuum intensities. In addition, the intensity−line width relation holds for all spectral lines in this study. The correlations indicate that the cool and hot plasma in LBs are coupled. Conclusions. Light bridges comprise multi-temperature and multi-disciplinary structures extending up to the TR. Diverse heating sources supply the energy and momentum to different layers, resulting in distinct dynamics in the photosphere, chromosphere, and TR.

Use of the solar limb effect to test photon decay and cosmological redshift theories

Nature ◽  
1979 ◽  
Vol 280 (5719) ◽  
pp. 255-256 ◽  
Author(s):  
JACQUES M. BECKERS ◽  
LAWRENCE E. CRAM
Keyword(s):  
Solar Limb ◽  
Cosmological Redshift ◽  
Photon Decay ◽  
Limb Effect

Pressure Broadening and Solar Limb Effect

1985 ◽  
pp. 373-380 ◽  
Author(s):  
Ištvan Vince ◽  
Milan S. Dimitrijević ◽  
Vladimir Kršljanin
Keyword(s):  
Solar Limb ◽  
Pressure Broadening ◽  
Limb Effect

scholarly journals The Solar Limb Effect: Observations of Line Contours and Line Shifts

1976 ◽  
Vol 177 (3) ◽  
pp. 687-708 ◽  
Author(s):  
M. G. Adam ◽  
P. A. Ibbetson ◽  
A. D. Petford
Keyword(s):  
Solar Limb ◽  
Limb Effect
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