HE 3-1475 AND ITS JETS

Abstract

We present spectra and high-resolution images taken with HST, the NTT, the VLA, and the MPIA/ESO 2.2m of the emission-line star He 3-1475 which we suggest is a post-AGB star. The star is at the origin of a 15-arcsec-long structure containing symmetrically opposing bright knots. The knots have radial velocities of about 500 km/s from the center of He 3-1475 to the ends of the jets. HST snapshots show that the core of He 3-1475 is unipolar with a star at the SE end and the nebula fanning out toward the NW. VLA observations show the presence of OH masers, which are positioned parallel to the optical jets. A model is proposed that accounts for all of the observational data. This unusual object may link the OH/IR stars having extreme outflow velocities with highly bipolar planetary nebulae.

14 pages, uu-encoded postcript. 6 figures available on request from Matt Bobrowski ([email protected])

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• Time-dependent ejection velocity model for the outflow of Hen 3--1475
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• High Resolution Millimeter Imaging of the Proto-Planetary Nebula He 3-1475
• Photometry and low resolution spectroscopy of hot post-AGB candidates
• The constant-velocity highly collimated outflows of the planetary nebula He 2-90
• A search for very young Planetary Nebulae
• IRAS 17423-1755 (Hen 3-1475) revisited: an O-rich high-mass post-Asymptotic Giant Branch star
• Optical polarization and near IR photometry of the proto-planetary nebula Hen 3-1475
• HST STIS UV Spectroscopic Observations of the Protoplanetary Nebula Hen3-1475
• ALMA observations of CO isotopologues towards six obscured post-AGB stars