The physical properties of cold gas at high galactic latitudes in the milky way
One of the most important components of the interstellar medium in our Galaxy is the neutral atomic hydrogen (HI). HI is predominantly found in the disk of the Galaxy. However, various processes, such as galactic winds, can expel a significant fraction of the HI above the Galactic plane into the hal...
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| Format: | bachelorThesis |
| Language: | eng |
| Published: |
2025
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| Subjects: | |
| Online Access: | http://repositorio.yachaytech.edu.ec/handle/123456789/930 |
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Add Tag | Summary: | One of the most important components of the interstellar medium in our Galaxy is the neutral atomic hydrogen (HI). HI is predominantly found in the disk of the Galaxy. However, various processes, such as galactic winds, can expel a significant fraction of the HI above the Galactic plane into the halo of the Milky Way. In this work, we show that the new revolutionary technology in observations allows combining HI emission-absorption wide-field surveys to be a powerful tool to map HI spatial distribution, allowing us to study the properties of the cold phase of HI gas at high galactic latitudes. We have analyzed HI emission and absorption spectra in ∼ 300 lines of sight in two different regions above the Galactic Plane Hydra at b ∼ 27◦ and Norma at b ∼-8◦. We calculate column densities using two different methods and find cold gas fractions between 2- 22% in the Norma field and 0- 6% in the Hydra field. |
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