| Issue |
A&A
Volume 423, Number 1, August III 2004
|
|
|---|---|---|
| Page(s) | 199 - 207 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20034539 | |
| Published online | 29 July 2004 | |
Chemical abundances of planetary nebulae towards the Galactic anticenter *,**
Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG), Universidade de São Paulo, Rua do Matão 1226, 05508-900, São Paulo SP, Brazil e-mail: [roberto;monica;maciel]@astro.iag.usp.br
Received:
20
October
2003
Accepted:
24
April
2004
In this paper we report new observations and derive chemical abundances for a sample of 26 planetary nebulae (PN) located in the anticenter direction. Most of these nebulae are far away objects, located at Galactocentric distances greater than about 8 kpc, so that they are particularly useful for the determination of the radial gradients at large distances from the galactic center. A comparison of the present results with previously determined abundances suggests that the radial abundance gradients flatten out at distances larger than about 10 kpc from the center.
Key words: ISM: planetary nebulae: general / Galaxy: disk / ISM: abundances
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.