Extreme nitrogen enrichment in the asymmetrical planetary nebulae M1-75

Bibcode
1995ApJ...444L..49G
DOI
10.1086/187857
Guerrero, Martin A.; Stranghellini, Letizia; Manchado, A.
Bibliographical reference

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 444, no. 1, p. L49-L52

Advertised on:
5
1995
Journal
Astrophysical Journal
Number of authors
3
IAC number of authors
2
Citations
20
Refereed citations
16
Description
In the framework of the morphological survey of northern sky planetary nebulae, in progress at the IAC we investigate in detail those nebulae that show peculiarities or that have not been studied before. By means of narrowband imaging and accurate two-dimensional spectroscopy we analyzed the peculiar nebula M1-75. Its morphology is very complex, consisting of two contiguous shells, surrounded by two previously undetected fainter lobes. Detailed plasma analysis showed an extreme nitrogen enrichment in the outmost shell (N/O = 2.85), as well as high helium abundance (He/H = 0.18), making this object a good candidate for peculiar stellar evolutionary paths. The detected abundances for heavy elements are among the highest ever detected in a galactic planetary nebulae.
Type
Refereed
Planetary nebulae
Stellar evolution
Extinction

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