Attiyah's Gegenschein

[Attiyah Zahdeh]

Attiyah's Gegenschein

1- The gegenschein is a light produced in the Earth's magnetic tail.

2- The gegenschein is associated with the neutral sheet and current sheet of the Earth's magnetic tail.


3- The gegenschein becomes markedly enhanced when a plasmoid structure is formed.

4- The gegenschein is mainly generated via electric discharges.

5- Only very small ratio of gegenschein is solar light reflected from on the plasma of the neutral sheet, the current sheet, and the plasmoid.

[Tenacious Del]

what is a magnetic tail?

[Attiyah Zahdeh]

what is a magnetic tail?

http://space.rice.edu/IMAGE/livefrom/5_magnetosphere.jpg


http://content.answers.com/main/content/wp/en/thumb/6/60/300px-Plasmoid.jpg

[Radar]

Beautiful sky effect.

Here is my resource -

http://www.allthesky.com/solarsystem/gegenschein.html

Some pics -

http://www.allthesky.com/solarsystem/preview/gegenschein-p.jpg

There is evidence that this caused by scattered dust though.


The two images above, taken about five days apart in August 2004, show the diffuse night sky brightness in the constellation of Capricornus. On the right hand side are the eastern outskirts of the milky way and just left of it some diffuse background structures probably because of remaining integrated star flux. These background structures are more or less identical on both images whereas the diffuse patch close to anthelion shifts about five degrees, just the amount the sun, and so the anthelion, shifts along the ecliptic in five days. It is not quite clear if the diffuse component between Milkyway and Gegenschein might belong to the Light-bridge. The plane of the ecliptic might favour this, however, the patterns seem to be fixed in the five day intervall. It is probably both: Light-bridge and integrated star flux superposed.

A more close inspection of the gegenschein's central position shows a considerable deviation of about 1 or 1.5 degrees from the anthelion to the south. The longitude along the ecliptic matches quite well with the anthelion (within an accuracy of roughly 0.5 degrees).


Notice in the photo how the light patterns change shape, this is consistent with changing clouds of dust particles, and not a changing in the Earth's magnetosphere (as far as I can tell). Unless the magnetosphere changes shape?

Ray

[Attiyah Zahdeh]

Beautiful sky effect.

Here is my resource -

http://www.allthesky.com/solarsystem/gegenschein.html

Some pics -

http://www.allthesky.com/solarsystem/preview/gegenschein-p.jpg

There is evidence that this caused by scattered dust though.



Notice in the photo how the light patterns change shape, this is consistent with changing clouds of dust particles, and not a changing in the Earth's magnetosphere (as far as I can tell). Unless the magnetosphere changes shape?

Ray

Hello Ray,

Why do you neglect that the geomagnetic tail is rich in plasma dust (dusty plasma)?
Without doubt, you can remember that the size of the particles of the dusty plasma of the geomagnetic tail is as large as that estimated for the interplanetary dust which some people supposed its presence to explain the zodiacal light and gegenschein.

However, the plasma sheet and the tail plasmoids are rich in "clouds" of dusty plasma. As well as, the magnetotail changes shape.

[Radar]

Why do you neglect that the geomagnetic tail is rich in plasma dust (dusty plasma)?

Okay, but where is the proof or observational data that the geomagnetic tail is rich in plasma dust?

And if so, how far from Earth (us) is this plasma dust? What's it's altitude?

Ray