The Minor-Merger Driven Nuclear Activity in Seyfert Galaxies: A Step toward the Simple Unified Formation Mechanism of Active Galactic Nuclei in the Local Universe

Details The Minor-Merger Driven Nuclear Activity in Seyfert Galaxies: A Step toward the Simple Unified Formation Mechanism of Active Galactic Nuclei in the Local Universe The Minor-Merger Driven Nuclear Activity in Seyfert Galaxies: A Step toward the Simple Unified Formation Mechanism of Active Galactic Nuclei in the Local Universe

1999-05-27

arxiv.org/abs/astro-ph/9905353v1

Astronomy and Astrophysics

Astrophysics

7 pages, 1 figure. The Astrophysical Journal, Part 1, in press

Scientific paper

10.1086/307814

Seyfert nuclei are typical active galactic nuclei (AGNs) in the local universe, which are thought to be powered by gas accretion onto a supermassive black hole (SMBH). The dynamical effect exerted either by non-axisymmetric gravitational potential (such as a stellar bar) or by interaction with other galaxies has been often considered to cause the efficient gas fueling. However, recent systematic studies for large samples of Seyfert nuclei have shown that; 1) Seyfert nuclei do not prefer barred galaxies as their hosts, and 2) only $\simeq$ 10% of Seyfert galaxies have companion galaxies. These findings raise again a question; "What is important in the fueling of nuclear activity ?" Here we suggest that an alternative fueling mechanism, the minor-merger (i.e., mergers between a gas-rich disk galaxy and a bound, less-massive satellite galaxy) driven fueling appears consistent with almost all important observational properties of Seyfert galaxies. Nucleated (i.e., either a SMBH or a dense nuclear star cluster) galaxies and satellites seem necessary to ensure that the gas in the host disk is surely fueled into the very inner region (e.g., $\ll$ 1 pc). Taking account that local quasars may be formed by major mergers between/among galaxies, we propose that all the AGNs in the local universe were made either by minor or by major mergers.

Affiliated with

Also associated with

No associations

Rating

The Minor-Merger Driven Nuclear Activity in Seyfert Galaxies: A Step toward the Simple Unified Formation Mechanism of Active Galactic Nuclei in the Local Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Minor-Merger Driven Nuclear Activity in Seyfert Galaxies: A Step toward the Simple Unified Formation Mechanism of Active Galactic Nuclei in the Local Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Minor-Merger Driven Nuclear Activity in Seyfert Galaxies: A Step toward the Simple Unified Formation Mechanism of Active Galactic Nuclei in the Local Universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-53774