Acquisition Dates: 3, 12, 17, 27 August, 2022
Frames -- All gain 100, -5°C, bin 1x1:
Ha: 73x300" (6h 5')
OIII: 68x300" (5h 40')
SII: 79x300" (6h 35')
R: 55x60" (55')
G: 43x60" (43')
B: 36x60" (36')
Integration: 20h 34'
Bortle Dark-Sky Scale: 4
This is a reprocessing of the data from my
recent image of the Western Veil Nebula Complex. Changes made:
- replaced the narrowband stars with RGB star data
- applied a bit more noise reduction and sharpening
- changed the color palette of the narrowband nebula color to HSO
- rotated the image 180 degrees to make it compatible and comparable with my image of the Eastern Veil Nebula Complex published a week ago
PixInsight was used for all processing. The field of view is the same size as (and slightly overlaps) my
earlier Eastern Veil Complex. (Mosaic opportunity!)
The reprocessing was to showcase the shock front at the leading edge of the expanding supernova remnant (along the top in red) in the same way as the very-prominent shock front in the Eastern Veil image. The Veil Nebula debris is expanding at a velocity of about 1.5 million kilometers per hour. The fast-moving debris plows into the surrounding gas and creates shock fronts, heating the gas to millions of degrees. The subsequent cooling of this gas produces the brilliant glowing color. The more diffuse character of the shock front in this image probably corresponds to a more face-on view of it. The sharper, more prominent filaments in the earlier Eastern Veil image probably correspond to a more edge-on view of the shock front.
The dynamics of the shock wave are described in more detail in this article:
https://phys.org/news/2015-09-revisiting-veil-nebula.html
Comments