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pro vyhledávání: '"J. M. Shuder"'
Autor:
J. M. Shuder
Publikováno v:
The Astronomical Journal. 86:1595
Autor:
J. M. Shuder, Donald E. Osterbrock
Publikováno v:
The Astrophysical Journal Supplement Series. 49:149
Observed profiles of H I, He I, and He II emission lines in 19 Seyfert 1 galaxies are presented. The data, reduced to energy units versus radial velocity, are given in accurate graphical form for comparison with theoretical models. The profiles are s
Autor:
J. M. Shuder
Publikováno v:
The Astrophysical Journal. 280:491
Autor:
J. M. Shuder
Publikováno v:
The Astrophysical Journal. 244:12
Autor:
J. M. Shuder
Publikováno v:
The Astrophysical Journal. 240:32
Spectrophotometric results of narrow--emission-line galaxies known to be X-ray sources are discussed. In many respects, the spectra of these galaxies are similar to Seyfert type 2 and other narrow--emission-line galaxies. However, evidence for a high
Autor:
J. M. Shuder
Publikováno v:
The Astrophysical Journal. 259:48
Measurements are presented which give the functional form of the H..beta../H..cap alpha.. and He I lambda5876/H..cap alpha.. ratios with cloud velocity in Seyfert 1 galaxies. Combined with present models of the line-emitting regions, these measuremen
Autor:
J. M. Shuder, Donald E. Osterbrock
Publikováno v:
The Astrophysical Journal. 250:55
Autor:
J. M. Shuder, G. M. MacAlpine
Publikováno v:
The Astrophysical Journal. 230:348
The intensities of QSO ultraviolet emission lines are investigated with the aid of photoionization model calculations. In efforts directed toward understanding recent observations, particular consideration is given to such processes as charge-exchang
Publikováno v:
Publications of the Astronomical Society of the Pacific. 92:259
Spectrophotometry of a faint filament near the position of the radio source W50 is presented. Emission lines that are characteristic of supernova remnants are seen with a radial velocity of about +100 km/s relative to the local standard of rest. The