Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002rmxac..13..127r&link_type=abstract
Emission Lines from Jet Flows, Isla Mujeres, Q.R., México, November 13-17, 2000 (Eds. W. J. Henney, W. Steffen, A. C. Raga, and
Astronomy and Astrophysics
Astronomy
2
Ism: Jets And Outflows, Planetary Nebulae: Individual (Hen 3-1475), Shock Waves
Scientific paper
The proto-planetary nebula Hen 3-1475 shows a remarkable highly collimated optical jet with a S-shaped string of shock-excited knots. Moreover, extremely high velocities have been observed in the innermost regions of its jet. We present a detailed analysis of the kinematic structure, and the excitation conditions in the shock-excited knots based on ground-based high dispersion spectroscopy and high angular resolution images obtained with the HST WFPC2. We discuss the similarities between the jet of Hen 3-1475 and the HH jets. Both exhibit double-peaked and extremely wide profiles, a decrease of the radial velocities with distance to the source in a step-like fashion, and high tangential velocities. The overall picture of Hen 3-1475 supports the description of the system as the result of time-dependent ejection velocity variability.
Bobrowsky Matthew
Estalella Robert
Garcia-Lario Pedro
Manchado Arturo
Riera Arnau
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