Local Group Galaxies: Abundances in NGC 3109

Bibcode
2005AIPC..804..265L
DOI
10.1063/1.2146291
Leisy, P.; Magrini, L.; Corradi, R.; Mampaso, A.
Bibliographical reference

PLANETARY NEBULAE AS ASTRONOMICAL TOOLS: International Conference on Planetary Nebulae as Astronomical Tools. AIP Conference Proceedings, Volume 804, pp. 265-268 (2005).

Advertised on:
11
2005
Number of authors
4
IAC number of authors
2
Citations
6
Refereed citations
3
Description
We present preliminary results of VLT spectroscopy follow-up of Planetary Nebulae (PNe) and HII regions in the dwarf Irregular galaxy NGC 3109. In total we have observed 15 PNe (of a total of 18) and about 50 HII: at least for 10 PNe and 10 HII regions the very faint [O III]4363 line is observed allowing to derive accurate abundances. The comparison of the abundances with several other galaxies in the Local Group helps to trace general trends: these dwarf galaxies have low initial metallicities, but also He and N are less enriched compared to what it is observed in our Galaxy, M 33 or in the Magellanic Clouds. As already suspected in the LMC and the SMC, but now also seen at lower metallicities the abundances of O and Ne seems to be affected by nucleosynthesis during the life of the PN progenitor.
Type
Non-refereed
Galaxies
Planetary nebulae
H II regions
Planetary nebulae

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