Recent chaqnges in the IUE spectrum of the very young planetary nebula He 3-1357 (=SAO 244567)

Details Recent chaqnges in the IUE spectrum of the very young planetary nebula He 3-1357 (=SAO 244567) Recent chaqnges in the IUE spectrum of the very young planetary nebula He 3-1357 (=SAO 244567)

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...443..245f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 443, no. 1, p. 245-248

Astronomy and Astrophysics

Astronomy

11

Carbon, Electron Density (Concentration), Iron, Line Spectra, Planetary Nebulae, Ultraviolet Spectra, Absorption Spectra, Data Processing, High Dispersion Spectrographs, Ultraviolet Astronomy

Scientific paper

We obtained the first high-dispersion IUE spectrum, and an additional low-dispersion spectrum of the very young planetary nebula He 3-1357 and its central star SDAO 244567. In 1988, it showed a very strong C IV lambda-1549 P Cygni profile which diminished and has disappeared by 1994, but C IV absorptions are seen in a high-resolution spectrum. The electron density from the C III F(lambda 1907)/F(lambda 1909) emission ratio is log Ne = 4.1/cc. The older IUE data were reprocessed, and emission-line fluxes vary greatly for the period 1988-1994. The high-dispersion data show a rich Fe V and Fe VI absorption spectrum.

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