SIMBAD references

2013ApJ...765...69D - Astrophys. J., 765, 69 (2013/March-1)

Very long baseline array imaging of parsec-scale radio emissions in nearby radio-quiet narrow-line Seyfert 1 galaxies.

DOI A., ASADA K., FUJISAWA K., NAGAI H., HAGIWARA Y., WAJIMA K. and INOUE M.

Abstract (from CDS):

We conducted Very Long Baseline Array (VLBA) observations of seven nearby narrow-line Seyfert 1 (NLS1) galaxies at 1.7 GHz (λ18 cm) with milliarcsecond resolution. This is the first systematic very long baseline interferometry study focusing on the central parsec-scale regions of radio-quiet NLS1s. Five of the seven were detected at a brightness temperature of ≳ 5x106 K and contain radio cores with high brightness temperatures of >6x107 K, indicating a nonthermal process driven by jet-producing central engines as in radio-loud NLS1s and other active galactic nucleus classes. VLBA images of MRK 1239, MRK 705, and MRK 766 exhibit parsec-scale jets with clear linear structures. A large portion of the radio power comes from diffuse emission components that are distributed within the nuclear regions ( ≲ 300 pc), which is a common characteristic throughout the observed NLS1s. Jet kinetic powers limited by the Eddington limit may be insufficient to allow the jets to escape to kiloparsec scales for these radio-quiet NLS1s with low-mass black holes of ≲ 107 M.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual (MRK 110, MRK 705, MRK 1239, NGC 4051, MRK 766) (NGC 4253), MRK 783, AKN 564 - galaxies: jets - galaxies: Seyfert - radio continuum: galaxies

Simbad objects: 21

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2019.10.15-07:34:49

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