Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...91..491g&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 91, no. 2, p. 491-505
Astronomy and Astrophysics
Astronomy
119
Compact Galaxies, H Beta Line, Line Shape, Oxygen, Plasma-Electromagnetic Interaction, Quasars, Radio Astronomy, Radio Emission, Radio Galaxies, Radio Spectra, Radio Transmission, Spectroscopy, Continuous Radiation, Data Reduction, Interstellar Gas, Ionized Gases, Radio Jets (Astronomy), Seyfert Galaxies, Spectrographs, Telescopes
Scientific paper
We present both low- and high-dispersion spectra for a sample of 19 compact steep-spectrum (CSS) radio galaxies and quasars, as well as a sample of related objects with dominant kiloparsec-scale steep-spectrum radio emission. The basic characteristics of the CSS class is that it contains powerful steep-spectrum radio sources which are confined within the dimensions of the host galaxy. Previous studies suggest that these sources suggest that these sources may be good candidates for finding strong interactions between the radio source and the interstellar medium of the host galaxy. Our spectra provide measurements of emission-line flux, flux ratios, equivalent widths, and continuum properties, as well as measurements of the (O III) lambda 5007 and H(beta) emission line profile shapes. These data are analyzed in more detail in the second paper in this series, where we compare the optical emission line properties of CSS sources with other classes of active galaxies. As a class, the CSS sources have relatively strong, high equivalent width, high excitation line emission, with broad, structured (O III) lambda 5007 profiles. These properties are consistent with the picture of strong interactions between the radio source and the interstellar medium in CSS sources.
Gelderman Richard
Whittle Mark
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