Effects of the X-ray emission from young stars on the ionization level of a fractal star forming cloud
| dc.creator | Lorenzani, Andrea | |
| dc.creator | Palla, Francesco | |
| dc.date | 2000-11-27 | |
| dc.date.accessioned | 2026-07-07T01:56:43Z | |
| dc.date.available | 2026-07-07T01:56:43Z | |
| dc.description | We present the initial results of a study aimed at computing the global effects of the X-ray ionization due to young stars within a molecular cloud that forms stars with a standard IMF at a rate accelerating with time. We model the gas distribution of the cloud as a fractal of dimension 2.3. We introduce the concept of a "Roentgen sphere" as the region around each PMS star where the ionization rate due to stellar X-rays exceeds that due to interstellar cosmic rays. Using values of the X-ray luminosity typical of T Tauri stars, we find that within the Roentgen radius the average ionization rate is increased by a factor 4 to 20 with respect to the value obtained from cosmic-rays. | |
| dc.description | To be published in "Stellar Clusters and Associations", eds. T. Montmerle and P. Andre' (ASP Conf. Ser.), 6 pages, 5 figures, uses newpasp.sty | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0011486 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0011486 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/2102 | |
| dc.subject | Astrophysics | |
| dc.title | Effects of the X-ray emission from young stars on the ionization level of a fractal star forming cloud | |
| dc.type | text |