Electron temperature fluctuations in H II regions
نویسندگان
چکیده
منابع مشابه
Temperature fluctuations in H II regions: t2 for the two-phase model
Aims. We investigate temperature fluctuations in H ii regions in terms of a two-phase model, which assumes that the nebular gas consists of a hot and a cold phase. Methods. We derive general formulae for T ([O iii]), the [O iii] forbidden line temperature, and T (H i), the hydrogen Balmer jump temperature, in terms of the temperatures of the hot and cold phases, Th and Tc. Results. For large te...
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We compare the rate of kinetic energy injected by stellar winds into the extragalactic H ii region NGC 2363 to the luminosity needed to feed the observed temperature fluctuations. The kinetic luminosity associated to the winds is estimated by means of two different evolutionary synthesis codes, one of which takes into account the statistical fluctuations expected in the Initial Mass Function. W...
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RESUMEN Discutimos algunos resultados observacionales recientes sobre regiones H II ultracompactas. En particular, discutimos la emisión extendida de algunas regiones H II UC y el descubrimiento de una nueva clase, denominada regiones H II " hipercompactas ". Además, describimos la obtención de la estructura de densidad usando la técnica del análisis deí ındice espectral. ABSTRACT We discuss so...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2006
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20054736