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Date and Time of the Query: 2019-06-25 T06:58:28 PDT
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For refcode 1989ApJ...343..659U:
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Copyright by American Astronomical Society. Reproduced by permission
1989ApJ...343..659U RADIO STRUCTURES OF SEYFERT GALAXIES. VII. EXTENSION OF A DISTANCE-LIMITED SAMPLE JAMES S. ULVESTAD Jet Propulsion Laboratory, California Institute of Technology AND ANDREW S. WILSON Astronomy Program, University of Maryland Received 1988 March 28; accepted 1989 January 24 ABSTRACT The VLA has been used at 6 and 20 cm to observe 27 Seyfert galaxies with recessional velocities less than 4600 km s^-1^ that had not been mapped previously. Observational results are presented for these galaxies. All 57 objects known to be Seyfert galaxies as of mid-1983 with recession velocities less than 4600 km s^-1^ and {delta} >= -45^deg^ have now been mapped. Analysis of this distance-limited sample shows weak trends for Seyfert 2 galaxies to have more luminous and larger radio sources than Seyfert 1 galaxies. However, these differences are much smaller than reported previously and may not be statistically significant. This is probably a result of the inclusion of recently discovered, weak Seyferts of type 2 which had been omitted previously. A 20 cm radio luminosity function is constructed for each Seyfert type and shown to be fairly flat for powers between 10^20^ and 10^23^ W Hz^-1^. Three Seyfert 1 galaxies previously suspected of having flat spectra between 6 and 20 cm have also been observed at 2 cm; two of those three objects have flat spectra from 2 cm through 20 cm. Approximately 10% of the galaxies in the present sample may have flat-spectrum components contributing a substantial amount of their total flux density at centimeter wavelengths. Subject headings: galaxies: nuclei - galaxies: Seyfert - radio sources: galaxies
Retrieve 55 NED objects in this reference.
Please click here for ADS abstract

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