Contents of: VI/111/./abstract/CFANTI_CSS_GPS.abs

The following document lists the file abstract/CFANTI_CSS_GPS.abs from catalogue VI/111.
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   Compact Steep Spectrum (CSS) and GHz Peaked spectrum (GPS) radio
 sources  are powerful extragalactic radio sources with radio emission
 which is confined well within the host galaxies. They are thought to
 be either young objects, which have yet to  develop extended radio
 lobes (like Cygnus A), or sources where the radio emitting plasma is
 trapped by an unusually dense interstellar medium. By searching for
 emission from cold dust, we will determine which of the two scenarios
 is correct. In the former case, CSS/GPS will have as much cold gas and
 dust as comparable power large size FRII sources. In the latter case,
 they should be the most logical group of high red-shift object in
 which to search for gas and dust, allowing us to extend the work on
 gas rich galaxies to  much higher red-shifts than IRAS was generally
 able to reach. As ISO is not carrying out an all-sky survey and the
 probability of finding serendipitously a sample of distant gas rich
 galaxies with ISO is low, this sample represents an excellent chance
 of finding distant analogues to the ultraluminous IRAS galaxies. IRAS
 observations of CSS/GPS were inconclusive, due to the limited
 sensitivity and the comparatively "short" observing wavelengths of
 that mission coupled with the spread of redshifts in these sources
 (generally considerably more distant than IRAS detected galaxies). ISO
 instead has both the sensitivity and the wavelength coverage to be
 able to tackle this problem. We wish to observe with ISOPHOT a sample
 of CSS/GPS  radio galaxies, together with a comparison sample of
 extended objects, matched in radio luminosity and redshift, in order
 to determine whether there is indeed an unusually dense and cold ISM
 in the host galaxies of CSS/GPS radio  galaxies as compared with
 extended radio galaxies. In either case the results are vital for a
 better understanding of radio source formation and developement, and
 of the nature of the environment of powerful radio sources, and, by
 extension, of the nature of giant galaxies at high redshift.