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M. Juda (SAO), W. T. Sanders, D. McCammon (Univ. of Wisconsin), W. Cui (Purdue U.)
Various models for the evolution of Milky Way interstellar medium place the volume filling fraction of hot gas at values ranging from 10% to 90%. The opacity of the Galaxy to soft X-ray emission makes it difficult to constrain this fraction. X-ray Observations of near-by, face-on galaxies that are similar to the Milky Way should give us a better idea volume of the Galactic disk that is filled with hot gas. We present the results of a search for X-ray emission from regions analogous to the Local Bubble in the near-face-on galaxy NGC 3184 using data from the ACIS on the Chandra X-ray Observatory.