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Radio Continuum Survey of an Optically Selected Sample of Nearby Seyfert Galaxies

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Ho, Luis C., Ulvestad, James S.·2001·The Astrophysical Journal Supplement Series

Abstract

We have used the Very Large Array (VLA) to conduct a survey for radio continuum emission in the sample of 52 Seyfert nuclei selected from the optical spectroscopic galaxy catalog of Ho, Filippenko, & Sargent. This Seyfert sample is the most complete and least biased available, and, as such, it will be useful for a variety of statistical analyses. Here we present the observations, measurements, and an atlas of radio maps. The observations were made at 6 cm in the B array and at 20 cm in the A array, yielding matched angular resolutions of ~1''. We detected 44 objects (85%) at 6 cm and 37 objects (71%) at 20 cm above a 3 σ threshold of 0.12 mJy beam -1 . The sources have a wide range of radio powers ( P ≈ 10 18 -10 25 W Hz -1 ), spectral indices (α ≈ +0.5 to -1), and linear sizes ( L ≈ few tens pc-15 kpc). The morphology of the radio emission is predominantly that of a compact core, either unresolved or slightly resolved, occasionally accompanied by elongated, jetlike features. Linearly polarized emission was detected at 6 cm in 12 sources, nine of which were also detected at 20 cm.

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Metadata

Authors
Ho, L. C., & Ulvestad, J. S.
Venue
The Astrophysical Journal Supplement Series
Published
2001-03
Volume
133
Issue
1
Pages
77-118
ISSN
  • 0067-0049 (ISSN-L)
  • 1538-4365
OpenAlex
W1985461644
Cited by
293
References
1
FWCI
10.59
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Radio Continuum Survey of an Optically Selected Sample of Nearby Seyfert Galaxies. https://app.cochat.ai/papers/10.1086/319185
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Ho, L. C., & Ulvestad, J. S. (2001). Radio Continuum Survey of an Optically Selected Sample of Nearby Seyfert Galaxies. The Astrophysical Journal Supplement Series. https://doi.org/10.1086/319185

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