Results 71 to 80 of about 48,086 (123)
Evidence for a Binary origin of the Young Planetary Nebula HB 12 [PDF]
arXiv, 2006 Young planetary nebulae play an important role in stellar evolution when intermediate- to low-mass stars (0.8 ~ 8 M) evolve from the proto-planetary nebulae phase to the planetary nebulae phase. Many young planetary nebulae display distinct bipolar structures as they evolve away from the proto-planetary nebulae phase.
arxiv
A Dust-Scattering Model for M1-92: A Revised Estimate of the Mass Distribution and Inclination
GalaxiesPreplanetary nebulae (PPNe) are formed from mass-ejecting late-stage AGB stars. Much of the light from the star gets scattered or absorbed by dust particles, giving rise to the observed reflection nebula seen at visible and near-IR wavelengths ...
Yun Qi Li +2 more
doaj +1 more source
Internal Motions in the Planetary Nebula IC 4997 [PDF]
, 1962 O. C. Wilson, C. R. O’dell
openalex +1 more source
On the Variability of the Central Star of the Planetary Nebula HZ 1–5 [PDF]
, 1968 G. H. Herbig, A. A. Boyarchuk
openalex +1 more source
Dynamical Evolution of a Model Planetary Nebula [PDF]
, 1968 William G. Mathews
openalex +1 more source
Optical Spectroscopy and Photoionization Model of Planetary Nebula NGC 6572
Journal of Mathematical and Fundamental SciencesWe investigated NGC 6572 through optical spectroscopy to determine its kinematical and chemical properties. Two intermediate dispersion spectra (R~5000) centered around Hα and Hβ were used to derive the nebular expansion velocity from emission lines ...
Muhammad Fajrin +2 more
doaj +1 more source
An Extremely Hot Pulsating Prewhite Dwarf from OGLE
The Astronomical JournalWe show that the blue 18.3 minutes variable object discovered in the Galactic disk by the OGLE-III survey and named OGLE-GD-WD-0001 is a pulsating prewhite dwarf of PG 1159 spectral type.
Paweł Pietrukowicz +3 more
doaj +1 more source