High-resolution imagery of the Bipolar, Rotating, Episodic Jet in the Planetary Nebula PK112-001

Details High-resolution imagery of the Bipolar, Rotating, Episodic Jet in the Planetary Nebula PK112-001 High-resolution imagery of the Bipolar, Rotating, Episodic Jet in the Planetary Nebula PK112-001

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6597l&link_type=abstract

HST Proposal ID #6597

Computer Science

Hst Proposal Id #6597 Interstellar Medium

Scientific paper

Evidence for the existence of bipolar, rotating, episodic jets {BRETs} has now been discovered in several planetary nebulae {PNe}. These jets are characterized by symmetric, diametrically opposite, collimated flows with observable, radiative, bow-shocks around their leading edges. It is the spatial distributions of the resultant knots of ionized gas which indicate rotations of the bi-polar, episodic jets. The most spectacular candidate for this BRET classification has now been discovered {Lopez et al, 1995}. A giant { 14' * 4' }, but faint, bipolar halo has been found to be extending from PK112-001 in which diametrically opposite pairs of collisionaly ionized knots are present. The angular extent of this bipolar structure is the largest one yet found around PNe and may indicate that it is the closest example of the phenomenon. The top priority for the proposed HST observations is to obtain imagery of the bright nebular core in the HAlpha, NII, SII and OIII nebular emission lines, and in blue and red regions free of lines, with an angular resolution of 0.1" to detect evidence of a central, collimating disk and/or a binary component to the central star. In addition, imagery of the shock ionized filaments close to the core, in the nebular emission lines, will reveal the changing ionization conditions along the collimateds flows.

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