Publications of the Astronomical Society of the Pacific, Volume 106, Issues 695-702Astronomical Society of the Pacific, 1994 |
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Page 500
... nebulae with detected circumnebular neutral shells . It is found that compact planetary nebulae with ionized radii less than about 0.05 pc show a distribution of expansion velocities that is similar to AGB envelopes , while large ...
... nebulae with detected circumnebular neutral shells . It is found that compact planetary nebulae with ionized radii less than about 0.05 pc show a distribution of expansion velocities that is similar to AGB envelopes , while large ...
Page 503
... nebulae having both radius and velocity known is shown in Fig . 3. This sample consists of 62 nebulae with linear radii of Rion≤0.05 pc . The expansion - velocity distri- bution of this subsample has an average of u = 15.3 km s exp1 ...
... nebulae having both radius and velocity known is shown in Fig . 3. This sample consists of 62 nebulae with linear radii of Rion≤0.05 pc . The expansion - velocity distri- bution of this subsample has an average of u = 15.3 km s exp1 ...
Page 507
of planetary nebulae until after the ionized radii of the nebu- lae reach a value larger than about 0.05 pc . It is interesting to note that many of the planetary nebulae with observed molecular and atomic envelopes have signifi- cantly ...
of planetary nebulae until after the ionized radii of the nebu- lae reach a value larger than about 0.05 pc . It is interesting to note that many of the planetary nebulae with observed molecular and atomic envelopes have signifi- cantly ...
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absorption abundance accretion analysis asteroids Astronomical Society binary bright calibration catalog central star chromospheric clouds color comets correction derived detection detector diagram disk distribution eclipse emission errors estimate evolution expansion velocities Fe/H field flux frame function galactic galaxies GCLF giant branch globular clusters H II regions Hyades indices infrared ionized km s¹ light curve lines luminosity magnitude main sequence main-sequence mass measured MNRAS objects observations Observatory obtained open clusters optical orbital parameters PASP period phase photometric pixel planetary nebulae plotted quasars radial velocities radius range ratio red giants reddening redshift region residuals rotation sample scale scatter secondary solar sources spectral type spectroscopic spectrum standard stellar stellar winds subgiant survey Table telescope temperature tion turnoff values variability wavelength white dwarf width X-ray XX Vir