Perhaps you're confusing the Cosmic version of
Intracloud Lightning with the Cosmic version of Clound-to-Ground lightning. On Earth, Intracloud lightning is by far actually the most common form of lighting. Not to be confused with cloud-to-ground lightning.
In this case,the LIC cloud column density towards the star Sirius led to the conclusion that the Sun has entered the LIC cloud within the last 2,000-8,000 years, and that the Sun is about ~0.1 pc from the surface in the downwind direction (Frisch, 1994) When the upper limits of the Ca II column density towards Aql (Vallergra et al., 1993) and the LIC Fe II column density towards Cen (Lallement et al., 1995) are included, then
we are forced to conclude that the Sun is located in a filament of difuse interstellar gas with a total thickness <0.7 pc. This filament is illustrated in Figure 4. -
LISM STRUCTURE-FRAGMENTED SUPERBUBBLE SHELL?
The text for reference you posted is telling you where they think filament is located. The filaments appear to be in the "wall" of The Loop I Superbubble in the first cartoon graphic of your link. There it lay via P. Firsch above - with a question mark - as to whether the filament that the Sun “APPEARS” to be “embedded” within is, or isn’t, a part of the Loop I Superbubble Shell:
Also:
During the past few million years, wispy filaments of interstellar gas have drifted into the Local Bubble. Our solar system is immersed in one of those filaments--the "local fluff," a relatively cool (7000 K) cloud containing 0.1 atoms per cubic centimeter. By galactic standards, the local fluff is not very substantial. It has little effect on Earth because the solar wind and the Sun's magnetic field are able to hold the wispy cloud at bay. – NASA:
Near Earth supernovas
And there it lay again, officially. Make no mistake much effort has been put into trying to assess the nature of our stellar orientation with respect to all of these filaments. One of the interesting things to note and give consideration to is portrayed in this cartoon (
here). Quite a lot of stellar activity occurs in the “walls”, “shells” and “fronts” – not just inside of the bubbles.
You might be interested in Figure 2 of that paper and it's caption:
"Green bars show the filament stars that are located toward the inner ridge of the nearby portion of Loop I." Some of filaments and the stars within them can generally be discerned. To my knowledge, no one has done any work to try and specifically associate them though.
One of the problems with trying to assess one’s location amidst so much filamentation stems from a lack of consideration for the established fact that the “expanding shells” of the Sco-Cen complex, the Local Bubble, our “chimney”, the Loop I Supershell etc are interacting with one another. They are electrically interacting with one another at the edges i.e. “rubbing”, “skimming” as it were. From same, it appears that there have been star forming epochs already.
In likewise fashion is the idea that at larger scales entire strings of galaxies and their stars have the greatest density of cosmic matter occurring at the interacting “walls” of so called “voids”:
One of the helpful features of void regions is that their boundaries are very distinct and defined, with a
cosmic mean density that starts at 10% in the body and quickly rises to 20% at the edge and then to 100% in the walls directly outside the edges. The remaining walls and overlapping void regions are then gridded into respectively distinct and intertwining zones of filaments, clusters, and near-empty voids.
(...)
On a more local scale, galaxies that reside in voids have differing morphological and spectral properties than those that are located in the walls. One feature that has been found is that voids have been shown to contain a significantly higher fraction of starburst galaxies of young, hot stars when compared to samples of galaxies in walls. (
Wiki: VoidFinder Algorithm).
Obviously, we can't see ourselves like the images assessed in "
Characterizing interstellar filaments with Herschel in IC 5146" and nowhere therein is the question being asked "What does it connect to?" The cosmic version of Intracloud Lightning are electric discharges between Cosmic "clouds".
"Our laws of force tend to be applied in the Newtonian sense in that for every action there is an equal reaction, and yet, in the real world, where many-body gravitational effects or electrodynamic actions prevail, we do not have every action paired with an equal reaction." — Harold Aspden
