FUSE Observations of the Planetary Nebulae He2-138 and its Central Star

Details FUSE Observations of the Planetary Nebulae He2-138 and its Central Star FUSE Observations of the Planetary Nebulae He2-138 and its Central Star

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.0621i&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #06.21; Bulletin of the American Astronomical Society, Vol. 31, p.1377

Astronomy and Astrophysics

Astronomy

Scientific paper

High resolution far-UV spectra of the central star of the planetary nebula He2-138 were obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) as part of the FUSE Early Release Observation program. Planetary nebulae represent a critical process by which intermediate mass stars eject appreciable amounts of processed, chemically enriched material. He2-138 is a low excitation planetary nebula (H I, [N II], [O II], and [S II] are detected in optical spectra), but has not been detected in H2 or CO emission. Nevertheless, the FUSE spectra show H2 absorption in the spectrum of He2-138. Using the central star as a background probe, we analyse the absorption spectrum of molecular hydrogen and a range of atomic species in the ISM and the planetary nebula envelope and the star's mass loss properties. This work is supported by NASA contract NAS5-32985.

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