The IUE Spectrum of the Planetary Nebula NGC 6751

Details The IUE Spectrum of the Planetary Nebula NGC 6751 The IUE Spectrum of the Planetary Nebula NGC 6751

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...448..766f&link_type=abstract

Astrophysical Journal v.448, p.766

Astronomy and Astrophysics

Astronomy

7

Stars: Mass Loss, Ism: Planetary Nebulae: Individual Ngc Number: Ngc 6751, Ultraviolet: Ism

Scientific paper

We present the first high-dispersion lUE short-wavelength (SWP) spectrum of NGC 6751 (029.2 -05.9) from which log Nc = 3.9±0.05 cm-3, terminal wind velocity v∞ = 2450±150 km s-1, and a maximum mass-loss rate of Mṡ(max) 7.9 × 10-8 Msun yr-1 are determined. Emission-line fluxes from low-dispersion spectra for the epochs 1981 and 1994 are presented which suggest some changes may have occurred. The C III] λλ1907, 1909 doublet displays an unusual triple-peaked profile in the high-resolution spectrum. The IUE range is characterized by a rich stellar spectrum of carbon lines at various stages of ionization and few nebular lines.

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