A new planetary nebula in the outer reaches of the Galaxy

Bibcode
2011A&A...530A.107V
DOI
10.1051/0004-6361/201014897
Viironen, K.; Mampaso, A.; Corradi, R. L. M.; Drew, J. E.; Frew, D. J.; Giammanco, C.; Greimel, R.; Liimets, T.; Lindberg, J. E.; Rodríguez, M.; Sabin, L.; Sale, S. E.; Wilson, P. A.; Zijlstra, A.
Bibliographical reference

Astronomy and Astrophysics, Volume 530, id.A107

Advertised on:
6
2011
Journal
Astronomy and Astrophysics
Number of authors
14
IAC number of authors
4
Citations
13
Refereed citations
12
Description
Aims: A proper determination of the abundance gradient in the Milky Way requires the observation of objects at large galactiocentric distances. With this aim, we are exploring the planetary nebula population towards the Galactic anticentre. In this article, the discovery and physico-chemical study of a new planetary nebula towards the anticentre direction, IPHASX J052531.19+281945.1 (PNG 178.1-04.0), is presented. Methods: The planetary nebula was discovered from the IPHAS survey. Long-slit follow-up spectroscopy was carried out to confirm its planetary nebula nature and to calculate its physical and chemical characteristics. Results: The newly discovered planetary nebula turned out to be located at a very large galactocentric distance (DGC = 20.8 ± 3.8 kpc), larger than any previously known planetary nebula with measured abundances. Its relatively high oxygen abundance (12+log(O/H) = 8.36 ± 0.03) supports a flattening of the Galactic abundance gradient at large galactocentric distances rather than a linearly decreasing gradient.
Related projects
Planetary Nebula "The Necklace"
Bipolar Nebulae
This project has three major objectives: 1) To determine the physico-chemical characteristics of bipolar planetary nebulae and symbiotic nebulae, to help understanding the origin of bipolarity and to test theoretical models, mainly models with binary central stars, aimed at explaining the observed morphology and kinematics. 2) To study the low
Antonio
Mampaso Recio
Closed
Type
Refereed
Stellar & Interstellar Physics (FEEI)

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