The orbital histories (over the past 3 Myr, shown in gray) of all stars hosting Strömgren spheres in Table 3. One white dwarf, WD 0501+527, shares similar directionality in its orbit (shown in cyan) as that of the CLIC (average shown in red). While the high speed of WD 0501+527 (67 km s⁻¹) is inconsistent with a CLIC formation scenario tied solely to this hot white dwarf, the surface of the Strömgren sphere from WD 0501+527 could have interacted with the supernova shock waves from the UCL cluster and aided the CLIC’s formation, as proposed for the largest Strömgren sphere in Section 3.2. An interactive version of this figure showing the full animation is available. A copy is also available online (https://faun.rc.fas.harvard.edu/czucker/Paper_Figures/Stromgren_Tracebacks.html). The interactive figure was created with plotly. In the upper-right corner are the standard plotly commands that allow one to pan, rotate, zoom, and reset the figure. In addition, the user can play the orbital histories of the stars forward and backward in time either through the buttons or by sliding the time slider. Lastly, different orbits can be shown or hidden by clicking the labels in the upper left.

(An interactive version of this figure is available in the online article.)

An interactive version of this figure is available.

An interactive version of this figure is available in the online journal.