SIMBAD references

2003A&A...404..969D - Astronomy and Astrophysics, volume 404, 969-974 (2003/6-4)

Determination of temperature of the ionizing stars of HII regions.


Abstract (from CDS):

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 R=log([OII]λλ3726+3729/[OIII]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.

Abstract Copyright:

Journal keyword(s): ISM: HII regions - stars: fundamental parameters - stars: early-type

Simbad objects: 47

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