SIMBAD references

2005ApJ...622L..53S - Astrophys. J., 622, L53-L56 (2005/March-3)

Sculpting a pre-planetary nebula with a precessing jet: IRAS 16342-3814.

SAHAI R., LE MIGNANT D., SANCHEZ CONTRERAS C., CAMPBELL R.D. and CHAFFEE F.H.

Abstract (from CDS):

We have imaged the bipolar pre-planetary nebula IRAS 16342-3814 with the Keck adaptive optics (AO) system in four near-infrared bands in the 1.6-4.7 µm range. The lobes, which showed smoothly varying brightness distributions in previous optical images taken with the Hubble Space Telescope, have a limb-brightened appearance in the AO images, with a remarkable corkscrew structure inscribed on the lobe walls. A well-collimated, precessing jet with a diameter ≲100 AU and a precession period ≲50 yr, interacting with ambient circumstellar material, is most likely responsible for the corkscrew structure and the lobes, as indicated by a detailed comparison of our observations with published numerical simulations. The very red colors of the lobes in the near-infrared, coupled with their visibility at optical wavelengths, require that at least half, but not all, of the light of the central star be trapped by a compact circumstellar dust cloud heated to ∼600-700 K and reradiated in the infrared. The lobes are thus illuminated both by the infrared light from this dust cloud as well as by the optical light from the central star.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - ISM: Jets and Outflows - ISM: Planetary Nebulae: General - Stars: AGB and Post-AGB - Stars: Individual: Alphanumeric: IRAS 16342-3814 - Stars: Mass Loss

Simbad objects: 9

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2021.08.05-13:20:54

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