As much as half of the gas mass in our Galaxy's dark matter halo may reside not in the galaxy itself, but in the surrounding volume, the circumgalactic medium (CGM). The vast gas content of the CGM, loosely defined as the volume immediately outside the galaxy but inside the dark...
The study of the translucent interstellar medium (ISM) is important for understanding the behavior of the ISM as it transitions from hot, tenuous gas to dense, star-forming regions. This regime is know to be associated with the initial formation of persistent molecular material, and thus represents the first stages of...
Two unique structures make up the nucleus of our Galaxy on different scale sizes. On a broad scale of a few hundreds of parsecs, there is the well-known central molecular zone which comprises a substantial component of the gas in the Galaxy. The other, known as the mini-spiral, is streamers...