Study of Butterfly-Shaped Coronal Hole Evolution Across the Solar Disk

We studied the evolution of a butterfly-shaped coronal hole (CH) observed from 2025 September 8 to 14 using SDO/AIA 193 Å images and SDO/HMI line-of-sight magnetograms. The CH boundary was identified using a fixed 100 DN intensity threshold, and its area, mean EUV intensity, and total unsigned magnetic flux were tracked across the solar disk. As the CH approached the central meridian, its area increased from approximately 7.70 times10 16 to 1.63 times10 17 m squared and its unsigned magnetic flux from 8.68 times10 21 to 1.91 times10 22 Mx, while the mean 193 Å intensity decreased from about 61 to 45 DN. The area and unsigned flux showed similar temporal trends, whereas the intensity varied oppositely. Near central-meridian passage, these quantities remained relatively stable for several days. A high-speed solar-wind stream was detected at 1 AU about 2--4 days later, reaching 600--750 km s-1, consistent with the CH being its likely solar source. These results link the morphological, radiative, and magnetic evolution of the CH with the subsequent high-speed solar-wind stream.