Helium abundances in inner Galaxy planetary nebulae
2009 ◽
Vol 5
(S268)
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pp. 171-172
Keyword(s):
AbstractNew helium abundances of planetary nebulae located towards the bulge of the Galaxy were derived, based on observations made at OPD (Brazil). We present accurate helium abundances for 56 PNe located towards the galactic bulge. The data show good agreement with other results in the literature, in the sense that the distribution of the abundances is similar to previous works. Furthermore, the radial helium gradient is extended towards the galactic center. The results show that no trend can be identified when comparing the internal gradient (R ≤ 4 kpc) to the whole galactic disk.
2009 ◽
Vol 5
(S265)
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pp. 354-355
Keyword(s):
1998 ◽
Vol 184
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pp. 193-194
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Keyword(s):
Keyword(s):
1993 ◽
Vol 155
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pp. 581-581
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1996 ◽
Vol 173
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pp. 175-176
Keyword(s):
2009 ◽
Vol 5
(S266)
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pp. 482-482
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1995 ◽
Vol 148
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pp. 276-279
Keyword(s):
The UV and optical reddening law to the Galactic Bulge and CNO abundances in Bulge planetary nebulae
1993 ◽
Vol 153
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pp. 337-338
Keyword(s):
The Mean
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2011 ◽
Vol 7
(S283)
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pp. 406-407
Keyword(s):
1989 ◽
Vol 136
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pp. 129-133
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Keyword(s):