Bibcode
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
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
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