Automatic Shell Detection in CGPS Data
| dc.creator | Mashchenko, Sergey | |
| dc.creator | St-Louis, Nicole | |
| dc.date | 2000-10-06 | |
| dc.date.accessioned | 2026-07-07T01:55:52Z | |
| dc.date.available | 2026-07-07T01:55:52Z | |
| dc.description | A numerical code aiming at the automatic detection of spherical expanding HI shells in radio data-cubes is presented. The following five shell parameters are allowed to vary within a specified range: angular radius, expansion velocity and three center coordinates (galactic coordinates l and b, and systemic radial velocity V). We discuss several factors which can reduce the sensitivity of the shell detection: the presence of noise (both instrumental and "structural"), the fragmentation and asphericity of the shell and the inhomogeneity of the background and/or foreground emission. The code is tested on four objects: two HII regions and two early B stars. We use HI data from the Canadian Galactic Plane Survey. In all four cases the evidence for an expanding HI shell is found. | |
| dc.description | 6 pages, 4 figures; to appear in the proceedings of the conference "Interacting Winds from Massive Stars" (ASP Conference Series), eds. A. F. J. Moffat, and N. St-Louis | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0010140 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0010140 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/1800 | |
| dc.subject | Astrophysics | |
| dc.title | Automatic Shell Detection in CGPS Data | |
| dc.type | text |