Kinematics of bipolar planetary nebulae

Details Kinematics of bipolar planetary nebulae Kinematics of bipolar planetary nebulae

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...278..247c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 278, no. 1, p. 247-254

Astronomy and Astrophysics

Astrophysics

25

Emission Spectra, Kinematics, Morphology, Planetary Nebulae, Velocity Distribution, Electron Density (Concentration), Radial Velocity, Spectrograms

Scientific paper

We present narrow band images and long axis spectra of the bipolar planetary nebulae (PNe) CTS 1, He 2-84, He 2-123, IC 4406, K 3-72, M1-16, Na 2, and We 1-4. CTS 1, previously described as a compact PN, is an extended elongated nebula. It presents relatively high expansion velocities (40 km/s) in its inner region and a pair of low velocity lobes ending in polar condensations. He 2-84 shows high velocity features (Delta Vrad = 125 km/s) in newly discovered faint outer extensions of the bipolar lobes. M1-16 (Schwarz 1992) has been reobserved and the shock features confirmed. The other PNe present low-velocity patterns which could be partially due to projection effects. The systemic velocities of the nebulae are computed, and the electron densities derived from the (SII) lambda-lambda 671.7, 673.1 doublet ratio. In addition, we discuss the detection and the expected versus measured intensities of the HeII lambda 656.0 line which, due to its vicinity to H alpha, can be sometimes confused with high velocity components of the hydrogen line. Some preliminary statistical considerations on the high velocity character of the class of bipolar planetary nebulae are also presented.

Affiliated with

Also associated with

No associations

Rating

Kinematics of bipolar planetary nebulae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Kinematics of bipolar planetary nebulae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinematics of bipolar planetary nebulae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1321896