TITLE:
Model of Hydrogen Deficient Nebulae in H II Regions at High Temperature
AUTHORS:
Belay S. Goshu, Derck P. Smits
KEYWORDS:
H II Regions, Planetary Nebulae, UV, Abundances, Interstellar Medium (ISM)
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.3 No.8,
August
6,
2015
ABSTRACT: In current photoionization models, determination of the ionization structure of the nebulae is a crucial
part of the calculations for non-uniform hydrogen density. We have been tried to compute temperature
fluctuations of electron and electron density by changing hydrogen density by scale factor
of 10 at high temperature of blackbody. We have studied the ionization structure of hydrogen and
helium by means of cloudy C13.01 codes. We find a reasonable close agreement of the computed
value. Moreover, the ionization structure of oxygen at ionization stages of, O I - O IV, in gaseous nebulae
are studied by changing non uniform hydrogen density with power law. Our simulation also
shows that how the change of this density affect temperature fluctuations, electron density and ionization
structures of oxygen, helium and hydrogen with and without grains. The result also shows
the impact of the forbidden lines of [O III] and [O II] to cool down the temperature of electron.