NDLI: Latitudinal and Solar-Cycle Variations of the White-Light Corona from SOHO/LASCO Observations

Content Provider	Springer Nature Link
Author	Fainshtein, V. G. Tsivileva, D. M. Kashapova, L. K.
Copyright Year	2010
Abstract	SOHO/LASCO data were used to obtain the latitudinal and radial distributions of the brightness of the K- and F-corona in the period of 1996 – 2007, and their solar-cycle variations were studied. Then an inversion method was employed to obtain the radial distributions of the electron density N $_{e}$(R,θ) for various latitude values on the coronal images. Our values of N $_{e}$(R,θ) are in good agreement with the findings of other authors. We found that in an edge-on streamer belt the electron density, like the K-corona brightness, varies with distance more slowly in the near-equatorial rays than in near-polar regions. We have developed a method for assessing the maximum values of the electron density at the center of the face-on streamer belt in its bright rays and depressions between them. Not all bright rays observed in the face-on streamer belt are found to be associated with an increased electron density in them. Mechanisms for forming such rays have been suggested.
Starting Page	203
Ending Page	216
Page Count	14
File Format	PDF
ISSN	00380938
Journal	Solar Physics
Volume Number	267
Issue Number	1
e-ISSN	1573093X
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-10-21
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Electron density K- and F-corona White-light corona Extraterrestrial Physics, Space Sciences Meteorology/Climatology Astrophysics and Astroparticles
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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Latitudinal and Solar-Cycle Variations of the White-Light Corona from SOHO/LASCO Observations

Three-Dimensional Electron Density from Tomographic Analysis of LASCO-C2 Images of the K-Corona Total Brightness

White-Light Observations and Polarimetric Analysis of the Solar Corona During the Eclipse of 1 August 2008

Mid-Term Quasi-Periodicities and Solar Cycle Variation of the White-Light Corona from 18.5 Years (1996.0 – 2014.5) of LASCO Observations

Intercomparison of the LASCO-C2, SECCHI-COR1, SECCHI-COR2, and Mk4 Coronagraphs

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The Extended Solar Cycle Tracked High into the Corona

The Impact of Geometry on Observations of CME Brightness and Propagation

Evaluating the Uncertainties in the Electron Temperature and Radial Speed Measurements Using White Light Corona Eclipse Observations

Latitudinal and Solar-Cycle Variations of the White-Light Corona from SOHO/LASCO Observations

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