Axially symmetric model planetary nebulae
Planetary nebulae NGC 7662 and NGC 7009 axially symmetric models from density distributions, H continuum threshold optical depths and central star temperatures
Kirkpatrick, R. C.↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Monochromatic photographs and isophotic contours of planetary nebulae. I - NGC 3242
Planetary nebula NGC 3242 monochromatic photographs and isophotic contours
Feibelman, W. A.↗
Ionization and heating of the Gum Nebula by energetic particles from the Vela X supernova
Model for ionization and heating of Gum Nebula by energetic particles from Vela X supernova
Boldt, E. A.↗
Cosmic ray effects in the Gum Nebula
Ionization of Gum nebula by energetic charged particles from supernova Vela X with estimate of gamma ray line emission from ambient gas, energetic nuclei interaction
Boldt, E. A.↗
Ultraviolet dwarfs and planetary nebulae
UV dwarfs observational lifetime, considering progenitor main sequence, red giants and planetary nebulae central stars evolutionary sequence
Stothers, R.↗
Infrared studies of galactic nebulae. II
Compact nebulae IC 4997, VV 8 and FG Sge observed at 3.5 and 11.0 microns, noting IR wavelength energy
Gillett, F. C.↗
The Gum Nebula - Fossil Stroemgren sphere of the Vela X supernova
Gum Nebula-fossil Stromgren sphere of Vela X supernova, deriving ionization model from interstellar measurements
Brandt, J. C.↗
Infrared line emission from planetary nebulae
Planetary nebulae NGC 6572, NGC 7009, NGC 7027 IR line emission, examining fine structure for Ne II, Cl IV, S IV and Ar III
Geballe, T. R.↗
Observation of 140-GHz formaldehyde line emission from the trapezium region of the Orion nebula
Formaldehyde line emission observed from trapezium H II region of Orion nebula, attributing to 140 GHz rotational transition
Jefferts, K. B.↗
The X-ray spectra of the Crab Nebula and NP 0532
Crab Nebula and pulsar NP 0532 X ray spectra discussing pulse profile, emission and interstellar absorption
Chubb, T. A.↗
Light from reflection nebulae. IV - Scattering by silicate grains
UBV colors and polarization models for reflection nebulae based on Mie scattering functions for exponential size distribution of silicate particles
Hanner, M. S.↗
Monochromatic photographs and isophotic contours of planetary nebulae - II - NGC 1535, 6572, 6543, 7662 and 7009
Planetary nebulae NGC 1535, 6572, 6543, 7662 and 7009, observing monochromatic photographs and isophotic contours
Feibelman, W. A.↗
Search for optical circular polarization in the Crab Nebula
Crab Nebula emissions on 4 and 6 November 1970, observing optical circular polarization
Angel, J. R. P.↗
Magnetic field structure around the Crab Nebula pulsar
Crab Nebula pulsar magnetic field structure, discussing linear polarization modifications and wisps
Scargle, J. D.↗
Timing observations of the Crab Nebula pulsar at the Arecibo Observatory
Crab Nebula pulsar NP0532 radio observations, noting long term slowing down and irregular perturbations in periodicity
Richards, D. W.↗
Measurement of strong planetary nebulae at short centimeter wavelengths
Strong planetary nebulae measurement at short centimeter wavelengths, observing flux densities and thermal spectra
Hobbs, R. W.↗
The Crab Nebula - Ancient history and recent discoveries
Crab Nebula model, discussing electromagnetic field time variation and electron acceleration and synchrotron emission
Rossi, B. B.↗
The Gum Nebula - Further evidence from spacecraft and ground-based instruments
Gum Nebula size, density and electron temperature data from RAE-1 and OGO-5 satellites and ground based telescopes observations, correlating with Vela X supernova outburst
Alexander, J. K.↗