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astro-ph2007★ 9 cited
Temperature fluctuations in H II regions: t2 for the two-phase model
Y. Zhang, B. Ercolano, X. -W. Liu
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 deri…
astro-ph2005
Helium Recombination Lines as a Probe of Abundance and Temperature Problems
Y. Zhang, R. H. Rubin, X. -W. Liu
The paper presents a simplified formula to determine an electron temperature, Te(He I), for planetary nebulae (PNe) using the He I 7281/6678 line flux ratio. In our previous studie…