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Black Hole Astrophysics with VLBI: Past, Present, and Future
- Workshop in honor of Professor INOUE Makoto's retirement -
March 27(Mon)-29(Wed), 2017
Mitaka Campus, NAOJ, Tokyo, Japan

Oral Presentation

Water-Vapor Megamasers in Active Galactic Nuclei

Author(s): Naomasa NAKAI (University of Tsukuba)

Presenter: Naomasa Nakai (University of Tsukuba)

Water-vapor maser emission is a unique and powerful probe to directly investigate the structure and dynamics of Active Galactic Nuclei (AGN) on the (sub-)parsec scale. To date, more than 3000 galaxies have been searched for water maser emission, and in about 150 AGN, water megamasers have been detected. Among them, more than 15 megamasers have been imaged with VLBI. I will show and discuss some characteristics of the maser disks and massive black holes detected.

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