Massive Stellar Content of Giant HII Regions in M 33 and M 101
| dc.creator | Pellerin, Anne | |
| dc.date | 2005-10-24 | |
| dc.date.accessioned | 2026-07-07T11:24:54Z | |
| dc.date.available | 2026-07-07T11:24:54Z | |
| dc.description | Far-ultraviolet (900-1200A) spectral synthesis of nine giant extragalactic HII regions in M 33 and M 101 is performed to study their massive stellar content. Several parameters are quantified, predicted, and compared to the literature: age, stellar mass, IMF slope, number of O-type and Wolf-Rayet stars, Halpha and 5500A continuum fluxes. The results of this particular technique are consistent with other methods and observations. This work shows that a total stellar mass of a few 10^3 Msun is needed to populate the IMF bins well enough at high masses to obtain accurate results from the spectral synthesis technique in the far-ultraviolet. A flat IMF slope seems to characterize better the stellar line profiles of these objects, which is likely the first sign of a small number statistic effect on the IMF. Finally, the HII region NGC 5461 is identified as a good candidate for hosting a second generation of stars, not yet seen at far-ultraviolet wavelengths. | |
| dc.description | 13 pages including figures, accepted for publication in AJ | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0510686 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0510686 | |
| dc.identifier | Astron.J.131:849-858,2006 | |
| dc.identifier | doi:10.1086/499073 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/195346 | |
| dc.subject | Astrophysics | |
| dc.title | Massive Stellar Content of Giant HII Regions in M 33 and M 101 | |
| dc.type | text |