AU Scale Structures in Extra-planar Gas
| dc.creator | Richter, Philipp | |
| dc.date | 2004-09-15 | |
| dc.date.accessioned | 2026-07-25T12:17:30Z | |
| dc.description | Recent spectroscopic observations of intermediate- and high-velocity clouds (IVCs and HVCs) in the Milky Way halo have unveiled the presence of diffuse interstellar molecular hydrogen (H_2) several kpc away from the Galactic disk. Most of this H_2 gas appears to reside in relatively small (~0.1 pc), dense (n_H~30 cm^-3) gaseous filaments that probably are part of the cold neutral medium (CNM) in IVCs and HVCs. Also much smaller structures at AU scale and very high densities (n_H~800 cm^-3) have been observed, suggesting the presence of tiny-scale atomic structures (TSAS) in the Milky Way's extra-planar gas. It is not yet understood how such objects can form and exist in the Milky Way halo, but the high detection rate of H_2 absorption in IVCs implies that the CNM represents a gas phase that is characteristic for neutral clouds in the lower halo. | |
| dc.description | 8 pages, 3 figures; to appear in the conference proceedings of the "Extra-planar Gas" conference, Dwingeloo, June 7-11, 2004 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0409359 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0409359 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/9042 | |
| dc.subject | Astrophysics | |
| dc.title | AU Scale Structures in Extra-planar Gas | |
| dc.type | text |