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- W3100104003 abstract "Recently, a suspicion arose that the free electrons in planetary nebulae (PNe) and HII regions might have non-thermal energy distributions. In this scenario, a kappa index is introduced to characterize the electron energy distributions, with smaller kappa values indicating larger deviations from Maxwell-Boltzmann distributions. Assuming that this is the case, we determine the kappa values for a sample of PNe and HII regions by comparing the intensities of [OIII] collisionally excited lines and the hydrogen Balmer jump. We find the average kappa indices of PNe and HII regions to be 27 and 32, respectively. Correlations between the resultant kappa values and various physical properties of the nebulae are examined to explore the potential origin of non-thermal electrons in photoionized gaseous nebulae. However, no positive result is obtained. Thus the current analysis does not lend to support to the idea that kappa-distributed electrons are present in PNe and HII regions." @default.
- W3100104003 created "2020-11-23" @default.
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- W3100104003 date "2016-01-22" @default.
- W3100104003 modified "2023-10-03" @default.
- W3100104003 title "ON THE NONTHERMAL <i>κ</i>-DISTRIBUTED ELECTRONS IN PLANETARY NEBULAE AND H ii REGIONS: THE <i>κ</i> INDEX AND ITS CORRELATIONS WITH OTHER NEBULAR PROPERTIES" @default.
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- W3100104003 doi "https://doi.org/10.3847/0004-637x/817/1/68" @default.
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