Hα intensity map of the Orion-Eridanus superbubble based on VTSS, SHASSA, and WHAM data. The dashed line traces the contour of the analysed region. The white labels on the left-hand side show the key Hα features towards Orion. In the analysed region, the black contours delineate the main H I shells we identify in Sect. 3: the north rim (N), south loop (S), east shell (E), and west rim (W). The line of constant Galactic latitude b = −8° in the upperleft corner indicates the orientation of the Galactic plane.
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