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.
Referencia bibliográfica

Astronomy and Astrophysics, Volume 530, id.A107

Fecha de publicación:
6
2011
Revista
Astronomy and Astrophysics
Número de autores
14
Número de autores del IAC
4
Número de citas
13
Número de citas referidas
12
Descripción
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.
Proyectos relacionados
Nebulosa Planetaria "Necklace"
Nebulosas Bipolares

Nuestro proyecto persigue tres objetivos principales: 1) Determinar las condiciones físico-químicas de las nebulosas planetarias con geometría bipolar y de las nebulosas alrededor de estrellas simbióticas. El fin es entender el origen de la bipolaridad y poner a prueba los modelos teóricos que intentan explicar la morfología y la cinemática nebular

Antonio
Mampaso Recio
Cerrado
Tipo
Con árbitro
Física estelar e interestelar (FEEI)

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