1. Spitzer Infrared Spectrograph (IRS) observations of Large Magellanic Cloud planetary nebula SMP 83
- Author
-
Bernard-Salas, J, Houck, [No Value], Morris, PW, Sloan, GC, Pottasch, [No Value], Barry, DJ, and Kapteyn Astronomical Institute
- Subjects
SPECTRUM ,infrared : ISM ,SPECTROSCOPY ,STAR ,Astrophysics::High Energy Astrophysical Phenomena ,Astrophysics::Cosmology and Extragalactic Astrophysics ,planetary nebulae : individual (SMP 83) ,ISM : abundances ,EVOLUTION ,ABUNDANCES ,Magellanic Clouds ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Earth and Planetary Astrophysics ,ISM : lines and bands ,Astrophysics::Galaxy Astrophysics - Abstract
The first observations of the infrared spectrum of the LMC planetary nebula SMP 83 as observed by the recently launched Spitzer Space Telescope are presented. The high-resolution (R similar to 600) spectrum shows strong emission lines but no significant continuum. The infrared fine-structure lines are used, together with published optical spectra, to derive the electron temperature of the ionized gas for several ions. A correlation between the electron temperature and the ionization potential is found. Ionic abundances for the observed infrared ions have been derived, and the total neon and sulfur abundances have been determined. These abundances are compared to average LMC abundances of H II regions in order to better understand the chemical evolution of these elements. The nature of the progenitor star is also discussed.
- Published
- 2004