In search for the oldest star forming regions in Holmberg II
| dc.creator | Kerp, J. | |
| dc.creator | Walter, F. | |
| dc.date | 2000-12-12 | |
| dc.date.accessioned | 2026-07-07T01:57:00Z | |
| dc.date.available | 2026-07-07T01:57:00Z | |
| dc.description | We present an X-ray study of the irregular dwarf galaxy Holmberg II based on deep ROSAT PSPC observations. Holmberg II is one of the most famous examples of an irregular dwarf galaxy with a disrupted interstellar medium (ISM): expanding HI holes are present across the entire face of the galaxy. Huge HI cavities of kpc extent are found even outside current starforming regions. We search for faint X-ray sources (stellar end points as well as hot gas), touching the limits of the ROSAT PSPC detector and link the newly detected X-ray sources to features detected in other wavelengths. Using an X-ray hardness ratio color-color diagram we show that it is possible to differentiate between thermal plasma and power-law X-ray spectra, which helps to track down the physical nature of the individual sources. | |
| dc.description | 6 pages. To appear in Proc. "X-ray astronomy 2000" (Palermo, September 2000), Eds. R. Giacconi, L. Stella, S. Serio, ASP Conf. Series | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0012255 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0012255 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/2214 | |
| dc.subject | Astrophysics | |
| dc.title | In search for the oldest star forming regions in Holmberg II | |
| dc.type | text |