Volume 404, Number 3, June IV 2003
|Page(s)||969 - 974|
|Section||Interstellar and circumstellar matter|
|Published online||06 June 2003|
Determination of temperature of the ionizing stars of H II regions
Laboratório de Análise Numérica e Astrofísica, Departamento de Matemática, Universidade Federal de Santa Maria, 97119-900 Santa Maria, RS, Brazil
Corresponding author: O. Dors Jr., firstname.lastname@example.org
Accepted: 22 April 2003
The determination of temperature (Teff) of the ionizing stars of HII regions was considered. In this work we used photoionization models for HII regions ionized by a single star to show that the index (3726+3729/λ5007) can be used to estimate Teff. The relation R vs. Teff proved to be rather independent of the chemical abundances, but strongly dependent on the ionization parameter of the nebula. In order to check the reliability of using R for temperature determination, we compared the values of Teff obtained via the index R for a sample of HII regions with data available in the literature with independent estimations.
Key words: ISM: HII regions / stars: fundamental parameters / stars: early-type
© ESO, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.