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Issue
A&A
Volume 367, Number 3, March I 2001
Page(s) 949 - 958
Section Diffuse matter in space
DOI http://dx.doi.org/10.1051/0004-6361:20000435


A&A 367, 949-958 (2001)
DOI: 10.1051/0004-6361:20000435

The ISO-SWS spectrum of planetary nebula NGC 7027

J. Bernard Salas1, 2, S. R. Pottasch2, D. A. Beintema1 and P. R. Wesselius1

1  SRON Laboratory for Space Research, PO Box 800, 9700 AV Groningen, The Netherlands
2  Kapteyn Astronomical Institute, PO Box 800, 9700 AV Groningen, The Netherlands

(Received 19 July 2000 / Accepted 27 November 2000)

Abstract
We present the infrared spectrum of the planetary nebula NGC 7027 observed with the Short Wavelength Spectrometer (SWS), on board the Infrared Space Observatory (ISO). These data allow us to derive the electron density and, together with the IUE and optical spectra, the electron temperature for several ions. The nebular composition has been determined, the evolutionary status of the central star is discussed and the element depletion in the nebula is given. We conclude that the progenitor was a C-rich star with a mass between 3 and 4 $M_{\odot}$.


Key words: ISM: abundances -- planetary nebulae: individual: NGC 7027 -- infrared: ISM: lines and bands

Offprint request: J. Bernard Salas, J.Bernard@sron.rug.nl

SIMBAD Objects in preparation



© ESO 2001