Other
Scientific paper
Nov 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..804...98o&link_type=abstract
PLANETARY NEBULAE AS ASTRONOMICAL TOOLS: International Conference on Planetary Nebulae as Astronomical Tools. AIP Conference Pr
Other
Planetary Nebulae, Stellar Spectra, Spectroscopy, Planetary Nebulae, Spectroscopy And Spectrophotometry
Scientific paper
We have analyzed the internal kinematics of the point-symmetric, young (1,100 yr) planetary nebula (PN), NGC 6572 using high-resolution (λ/Δλ = 50,000 and 61,000) optical long-slit spectra at six position angles including [O III]λ5007, Hα, and [N II]λ6583 obtained with HIDES (HIgh Dispersion Echelle Spectrograph) combined with the f/29 coudé focus of the 74-inch telescope at the Okayama Astrophysical Observatory (OAO, National Astronomical Observatory, Japan). Examination of these emission lines led to our discovery of a collimated outflow. This outflow has a different expansion velocity and direction from that of the main nebular shell. We also examined the physical conditions of the collimated outflow. The excitation mechanism and the behavior of Te and Ne are consistent with those found in the collimated components of other point-symmetric PNe.
Otsuka Maasaki
Tajitsu Akito
Tamura Shun
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