Spitzer-IRS Sectroscopy of the Prototype Wolf-Rayet star EZ CMa (HD 50896)
| dc.creator | Morris, P W | |
| dc.creator | Crowther, P A | |
| dc.creator | Houck, J R | |
| dc.date | 2004-06-03 | |
| dc.date.accessioned | 2026-07-07T02:13:24Z | |
| dc.date.available | 2026-07-07T02:13:24Z | |
| dc.description | We present mid-infrared Spitzer-IRS spectroscopy of the prototype WN star EZ CMa (HD50896, WN4b). Numerous stellar wind lines of HeII are revealed, plus fine-structure lines of [NeIII] 15.5um and [OIV] 25.9um. We carry out a spectroscopic analysis of HD50896 allowing for line blanketing and clumping, which is compared to the mid-IR observations. We make use of these stellar properties to accurately derive Ne/He=1.2-1.8E-4 and O/He=4.2-4.8E-5 by number, for the first time in an early WN star. In addition, we obtain N/C=40 and N/O=50 by number, values in perfect agreement with current predictions for rotating massive stars at the end of interior hydrogen burning. | |
| dc.description | 5 pages, 3 figures, accepted for Spitzer ApJS volume | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0406074 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0406074 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/7802 | |
| dc.subject | Astrophysics | |
| dc.title | Spitzer-IRS Sectroscopy of the Prototype Wolf-Rayet star EZ CMa (HD 50896) | |
| dc.type | text |