Milliarcsec-scale radio structure of a matched sample of Seyfert 1 and Seyfert 2 galaxies

Abstract

We have obtained mas-scale resolution very long baseline interferometry (VLBI) images of a sample of Seyfert 1 and Seyfert 2 galaxies at 5 GHz (wavelength, $\lambda$ = 6 cm). The Seyferts of the two types were chosen to be matched in several orientation-independent properties, primarily in order to rigorously test predictions of the unified scheme. We detected all the 15 objects that we observed. In this paper we describe the observations and data reduction procedures, and present the VLBI radio images as well as simultaneous Very Large Array images that we obtained for these 15 Seyferts.

arXiv comment14 pages, 2 figures (32 panels). Accepted for publication in Astronomy & Astrophysics

References in corpus (9)

• HST and VLA Observations of Seyfert 2 Galaxies: The Relationship between Radio Ejecta and the Narrow Line Region
• Radio Structures of Seyfert Galaxies. VIII. A Distance and Magnitude Limited Sample of Early-Type Galaxies
• The Frequency of Polarized Broad Emission Lines in Type 2 Seyfert Galaxies
• High-resolution radio observations of Seyfert galaxies in the extended 12-micron sample - I. The observations
• Jet directions in Seyfert galaxies: Radio continuum imaging data
• Compact Radio Cores in Seyfert Galaxies
• Parsec-scale radio structures in the nuclei of four Seyfert galaxies
• Sensitive VLBI Continuum and H I Absorption Observations of NGC 7674: First Scientific Observations with the Combined Array VLBA, VLA & Arecibo
• The Ionization Fraction in the Obscuring `Torus' of an Active Galactic Nucleus

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