Zobrazeno 1 - 10
of 28
pro vyhledávání: '"J. S. Neff"'
Autor:
T.A. Ellis, J. S. Neff
Publikováno v:
Icarus. 145:591-600
Eighty-five photometric scans of the inner comae of Comets P/Giacobini-Zinner, Sorrells, Bradfield, Furuyama, and P/Borrelly were obtained from 1985–1988. These comets were each observed on at least one night during this period of time, using narro
Autor:
J. S. Neff, Tracy A. Ellis
Publikováno v:
Icarus. 97:99-110
Model intensity profiles have been compared with those observed for the C2, C3, CN, and continuum emissions of Comet Halley, in order to constrain the dust and gas parameters. While most of the parameters were consistent with expected values, the lif
Autor:
Tracy A. Ellis, J. S. Neff
Publikováno v:
Icarus. 91:280-296
The present numerical model for neutral or charged dust-particle distribution prediction in P/Halley encompasses the spatial and temporal variations of the plasma parameters and magnetic field. A significant difference is noted between results for ne
Autor:
Edwin S. Barker, David C. Humm, William D. Cochran, Robert G. Tull, Anita L. Cochran, J. S. Neff, J. T. Bergstralh
Publikováno v:
Icarus. 60:221-235
The present absolute measurements of Titan, Uranus and Neptune geometric albedo spectra in the 3500-10,500 A range have a resolution of about 7 A, together with high SNR, in virtue of the exceptional effeciency of the spectrograph and Reticon detecto
Publikováno v:
Icarus. 35:112-120
Absolute spectrophotometric measurements of the Swan bands of two comets have been compared with computed synthetic spectra using modern Franck-Condon and Honl-London factors, and varying rotational, vibrational, and electronic excitation temperature
Publikováno v:
Icarus. 62:425-432
The energy budgets of Titan, Uranus, and Neptune are reevaluated using new observational data on energy input as well as unpublished data on energy output. The bolometric geometric albedo of each object was determined, and preliminary determinations
Autor:
Jay T. Bergstralh, J. S. Neff
Publikováno v:
Icarus. 55:40-49
Comparisons are undertaken of the results of Neptune absolute spectrophotometry from 3390 to 7800 A (having 10-A resolution over 3390-6055 A and 20-A resolution over 6055-7800 A) with both filter photometry and synthetic spectra computed on the basis
Publikováno v:
Icarus. 27:545-551
Absolute spectrophotometry of the coma of Comet Kohoutek 1973f is discussed for the nights of January 24 and 26, 1974. Specific intensities are measured for spectral features and a continuum band in the wavelength region λλ3460–6062A. The (0, 0)
Publikováno v:
Icarus. 46:27-39
A series of spatially resolved absolute spectrophotometric measurements of Saturn was conducted for the expressed purpose of calibrating the data obtained with the Imaging Photopolarimeter (IPP) on Pioneer 11 during its recent encounter with Saturn.
Autor:
John D. Fix, J. S. Neff
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 173:83P-85P