Modeling hydrogen-deficient Planetary Nebulae
1997 ◽
Vol 180
◽
pp. 235-235
Hydrogen-deficient planetary nebulae have central regions devoid of hydrogen. (See Harrington 1996 for a review of these nebulae.) They are characterized by exceptionally strong collisionally excited lines of [O III] and [Ne III], but relatively weak or undetected recombination lines of He or other elements. Such nebulae cannot be modeled successfully unless we include some source of heating in addition to photoionization by the central star.
1989 ◽
Vol 131
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pp. 189-189
Keyword(s):
2016 ◽
Vol 12
(S323)
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pp. 352-353
Keyword(s):
2011 ◽
Vol 7
(S283)
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pp. 442-443
Keyword(s):
1989 ◽
Vol 131
◽
pp. 355-355
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Keyword(s):
1980 ◽
Vol 58
◽
pp. 467-472
Keyword(s):
2003 ◽
Vol 209
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pp. 41-41
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