Near-Sun observations of an F-corona decrease and K-corona fine structure

@article{Howard2019NearSunOO,
  title={Near-Sun observations of an F-corona decrease and K-corona fine structure},
  author={Russell A. Howard and Angelos Vourlidas and V. Bothmer and R. C. Colaninno and Craig E. DeForest and Brendan Gallagher and J R Hall and Phillip C. Hess and Aleida K. Higginson and Clarence M. Korendyke and A. Kouloumvakos and Philippe Lamy and Paulette C. Liewer and Jon A. Linker and M. G. Linton and Paulo Fernando Penteado and Simon P. Plunkett and Nicolas Poirier and Noureddine Raouafi and Nathan Rich and Pierre P. Rochus and Alexis P. Rouillard and Dennis George Socker and Guillermo Stenborg and Arnaud F. R. Thernisien and Nicholeen, Mary Viall},
  journal={Nature},
  year={2019},
  pages={1-5}
}
Remote observations of the solar photospheric light scattered by electrons (the K-corona) and dust (the F-corona or zodiacal light) have been made from the ground during eclipses1 and from space at distances as small as 0.3 astronomical units2–5 to the Sun. Previous observations6–8 of dust scattering have not confirmed the existence of the theoretically predicted dust-free zone near the Sun9–11. The transient nature of the corona has been well characterized for large events, but questions still… 
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References

SHOWING 1-10 OF 86 REFERENCES
No Evidence of a Circumsolar Dust Ring from Infrared Observations of the 1991 Solar Eclipse
TLDR
Results are reported from an experiment conducted on Mauna Kea with a HgCdTe-array detector sensitive to wavelengths between 1 and 2.5 micrometers, using broad-band J, H, and K filters, which clearly show the inhomogeneous structure in the K-corona and the elliptical flattening of the F- Corona, but no evidence of a circumsolar, local dust component out to 15 solar radii.
Dust Near The Sun
We review the current knowledge and understanding of dust in the inner solar system. The major sources of the dust population in the inner solar system are comets and asteroids, but the relative
The outer solar corona as observed from Skylab - Preliminary results
The white-light coronagraph experiment has made frequent, periodic observations of the solar corona from 1.5 to 6.0 solar radii during the Skylab mission, and these observations will permit the
Multi-Spacecraft Observations of Solar Flare Particles in the Inner Heliosphere
For a number of impulsive solar particle events we examine variations of maximum intensities and times to maximum intensity as a function of longitude, using observations from the two Helios
A study of the background corona near solar minimum
The white light coronagraph data from Skylab is used to investigate the equatorial and polarK andF coronal components during the declining phase of the solar cycle near solar minimum. Measurements of
A solar storm observed from the Sun to Venus using the STEREO, Venus Express, and MESSENGER spacecraft
The suite of SECCHI optical imaging instruments on the STEREO-A spacecraft is used to track a solar storm, consisting of several coronal mass ejections (CMEs) and other coronal loops, as it
A Heuristic Approach to Remove the Background Intensity on White-light Solar Images. I. STEREO/HI-1 Heliospheric Images
White-light coronal and heliospheric imagers observe scattering of photospheric light from both dust particles (the F-Corona) and free electrons in the corona (the K-corona). The separation of the
Alfvénic velocity spikes and rotational flows in the near-Sun solar wind
TLDR
Observations of solar-wind plasma at heliocentric distances of about 35 solar radii reveal an increasing rotational component to the flow velocity of the solar wind around the Sun, peaking at 35 to 50 kilometres per second—considerably above the amplitude of the waves.
The Highly Structured Outer Solar Corona
We report on the observation of fine-scale structure in the outer corona at solar maximum, using deep-exposure campaign data from the Solar Terrestrial Relations Observatory-A (STEREO-A)/COR2
Characterization of the White-light Brightness of the F-corona between 5° and 24° Elongation
The white-light F-corona arises from light scattered by circumsolar dust. Using weekly models of the eastern side of the F-corona between 5° and 24° elongation, we analyzed the elongation and time
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