Other
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102.1301t&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, Nov. 1990, p. 1301-1309.
Other
8
Astronomical Photography, Image Processing, Line Shape, Planetary Nebulae, Stellar Evolution, Stellar Temperature, Electron Density (Concentration), Emission Spectra, Line Spectra
Scientific paper
The paper presents the results of analyses on the expansion characteristics of the low-excitation and unresolved planetary nebulae, M1-5, M1-9, K3-66, and K3-67. The sample nebulae are divided into two groups. The first includes the real compact planetary nebulae M1-5 and M1-9 based on their single-Gaussian profiles. The second one includes nebulae that are unresolved because of their large distances. The nebulae K3-66 and K3-67 should belong to the second group since they show the double-Gaussian components in the emission-line profiles. Relationships between expansion velocities and I(forbidden O III 5007 A)/I(H-beta) and between electron densities and expansion velocities give the basis for the above arguments and reveal that the nebulae IC 4997, Vy2-2, and M3-27 obviously are in different phases of evolution from those of other low-excitation planetary nebulae.
Shibata Katsunori M.
Tamura Shin'ichi
No associations
LandOfFree
Expansion analyses on low-excitation planetary nebulae with stellar images 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 Expansion analyses on low-excitation planetary nebulae with stellar images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Expansion analyses on low-excitation planetary nebulae with stellar images will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-842677