A Fanaroff-Riley Type I Candidate in Narrow-Line Seyfert 1 Galaxy Mrk 1239

Abstract

We report finding kiloparsec-scale radio emissions aligned with parsec-scale jet structures in the narrow-line Seyfert 1 (NLS1) galaxy Mrk 1239 using the Very Large Array and the Very Long Baseline Array. Thus, this radio-quiet NLS1 has a jet-producing central engine driven by essentially the same mechanism as that of other radio-loud active galactic nuclei (AGNs). Most of the radio luminosity is concentrated within 100 parsecs and overall radio morphology looks edge-darkened; the estimated jet kinetic power is comparable to Fanaroff--Riley Type I radio galaxies. The conversion from accretion to jet power appears to be highly inefficient in this highly accreting low-mass black hole system compared with that in a low-luminosity AGN with similar radio power driven by a sub-Eddington, high-mass black hole. Thus, Mrk 1239 is a crucial probe to the unexplored parameter spaces of central engines for a jet formation.

5 pages, 2 figures, 1 table, accepted for publication in ApJ Letter

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• Measuring the kinetic power of AGN in the radio mode
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Cited by in corpus (8)

• Large-scale environments of narrow-line Seyfert 1 galaxies
• Radio morphology of southern narrow-line Seyfert 1 galaxies with Very Large Array observations
• Dependence of the Radio Emission on the Eddington Ratio of Radio-Quiet Quasars
• Radio jet structures at ~100 parsec and larger scales of the $\gamma$-ray-emitting narrow-line Seyfert 1 galaxy PMN J0948+0022
• The radio-loud narrow-line Seyfert 1 galaxy 1H 0323+342 in a galaxy merger
• Uncovering the primary X-ray emission and possible starburst component in the polarized NLS1 Mrk 1239
• The Collisional and Photoionized Plasma in the Polarized NLS1 galaxy Mrk 1239
• A host galaxy study of southern narrow-line Seyfert 1 galaxies