The Local Bubble Debate
This report summarizes the discussions in the Session 1 and Session 3 groups which met to discuss the questions: “What Physical Processes Drive the Multiphase Interstellar Medium in the Local Bubble?”, and “What are the Energy and Pressure Balances in the Local Bubble?” Most of our understanding of the Local Bubble has come from soft X-ray observations, but recent appreciation of the importance of solar wind charge exchange (SWCX) reactions has shown that the heliosphere produces some fraction of the soft X-rays that were previously ascribed to the Local Bubble. Some astronomers suggest that the SWCX X-rays rather than Local Bubble emission could explain most of the locally produced X-rays. Our discussions, therefore, also included a debate concerning the Local Bubble’s existence.
KeywordsGalaxy: Local Bubble Solar System: Solar Wind Galaxy: ISM Observations: Diffuse X-rays Ultraviolet: O vi
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