The discovery potentially sheds light on the origin of bubbles of hot gas found below the galactic plane.
The Milky Way is home to gas, dust, billions of stars, and a supermassive black hole at its center. Living in this galactic home gives us exclusive insight into its components, but it also hinders our ability to get a zoomed out view of its structure. A recent discovery has the potential to redefine our understanding of the structure of the Milky Way and how it evolved over time.
The study suggests that these structures share a common origin story with the eROSITA bubbles, giant structures made of hot gas that werein the first all-sky survey map produced by the eROSITA X-ray telescope in 2020.
“This work provides the first detailed measurements of the magnetic fields in the Milky Way’s X-ray emitting halo and uncovers new connections between star-forming activities and galactic outflows,” He-Shou Zhang, a researcher at INAF and lead author of the study, said in an emailed statement. “Our findings show that the magnetic ridges we observed are not just coincidental structures but are closely related to the star-forming regions in our galaxy.
“This study marks a significant step forward in our understanding of the Milky Way,” Gabriele Ponti, a researcher at INAF, and one of the authors of the new paper, said in a statement. “What is fascinating to me here is that we see that also the Milky Way, a quiescent galaxy like many others, can eject powerful outflows and, in particular, that the star-forming ring at the end of the Galactic bar contributes significantly to the Galactic outflow.
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