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Journal of Physical Studies 17(1), Article 1902 [10 pages] (2013)
DOI: https://doi.org/10.30970/jps.17.1902 MASS OF IONIZED GAS IN GALACTICAL PLANETARY NEBULAE ENVELOPESV. V. Holovatyy, A. V. Demchyna
Department for
Astrophysics, Ivan Franko National University of Lviv, |
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The masses of the ionized gas $M_{\rm neb}$ in the envelopes of 151 planetary nebulae (PNe) are determined. The presence of ${\rm H}$ and ${\rm He}$ atoms is taken into account. The recombination as well as collisional contributions to emission of ${\rm H}_{β}$ and HeI lines, were is considered as well. It is shown that these collisional effects have not a strong influence on the determination of the PNe envelopes masses. Collisional contribution may be effective only in the task of precisional determination of the chemical composition of the PNe envelopes.
The obtained values of $M_{\rm neb}$ are compared with the corresponding data from other authors. It is shown that most of nebulae have mass of the ionized gas $M_{\rm neb} \simeq 0.1 M_{☉}$. It is mainly young objects with ages $t_{\rm age}\leq 5000$. The dependence of the ionized gas mass on PNe volume is obtained: ${\rm log}\,M_{\rm neb}=0.37\,{\rm log}\,V_{\rm neb}-20.5$.
PACS number(s): 98.38.Ly, 98.58.Li, 98.58.Ay, 98.38.Bn, 97.20.Rp