The Planetary Nebula Surrounding the WC:11 Star IRAS:17514-1555

Details The Planetary Nebula Surrounding the WC:11 Star IRAS:17514-1555 The Planetary Nebula Surrounding the WC:11 Star IRAS:17514-1555

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.267..692p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 267, NO. 3/APR1, P. 692, 1994

Astronomy and Astrophysics

Astronomy

5

Stars: Wolf-Rayet - Planetary Nebulae: Individual: Iras 17514-1555

Scientific paper

Imaging and long-slit spectroscopy of the nebula surrounding the WC 11 star IRAS 17514-1555 are presented that allow, for the first time, the nebula to be studied without contamination from the underlying star. These data show that the nebula is photoionized and does not appear to have an obvious scattering component. The nebula consists of two shells: a low-density outer region (diameter 18 arcsec) where ne ˜50 cm-3, and an unresolved inner nebula (diameter <1.5 arcsec) where ne > 2 × 104. The N, O and S abundances derived for the outer nebula seem typical of PNe but it is likely that He is enhanced. Simple modelling suggests that the nebula is kept in thermal equilibrium by a 20 000-22 000 K central star.

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