Metallicity and the spectral energy distribution and spectral types of dwarf O-stars
| Jazyk: | angličtina |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
FUNDAMENTAL PARAMETERS
COMBINED STELLAR STRUCTURE UPPER MAIN-SEQUENCE ISM : HII regions HOT STARS stars : atmospheres ISM : planetary nebulae : general stars : abundances H-II REGIONS stars : fundamental parameters COMPACT HII-REGIONS IONIZING FLUXES stars : early-type ISO SPECTROSCOPY B-STARS MASSIVE STARS |
| Zdroj: | Astronomy & astrophysics. 419(1):319-334 |
| ISSN: | 1432-0746 0004-6361 |
| Popis: | We present a systematic study of the effect of metallicity on the stellar spectral energy distribution (SED) of 0 main sequence (dwarf) stars, focussing on the hydrogen and helium ionizing continua, and on the optical and near-IR lines used for spectral classification. The spectra are based on non-LTE line blanketed atmosphere models with stellar winds calculated using the CMFGEN code of Hillier & Miller (1998). We draw the following conclusions. First, we find that the total number of Lyman photons emitted is almost independent of line blanketing effects and metallicity for a given effective temperature. This is because the flux that is blocked by the forest of metal lines at lambda |
| Databáze: | OpenAIRE |
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