Image Details
Caption: Figure 6.
Left: median perpendicular profiles, similar to the lower panels of Figure 5, but as a function of distance from the nebula center. The presence of the nebula background is clearer here and can be seen to reach the level of the sky background at around 90″ from the nebula center. Right: similar to the left panel, but for [O III].
© 2026. The Author(s). Published by the American Astronomical Society.