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Astrophysics and Space Science Proceedings
We observed the H2 O maser at the nucleus of the Seyfert 2, IC 2560, using the VLBA and the phased VLA. The systemic, red-shifted and blue-shifted maser features and a continuum component have been detected. We propose a maser disk in the nuclear region. The systemic and red-shifted features are emitted from a nearly edge-on disk with the position angle of PA = −47 • . The thickness is 2H < 0.025 pc. The binding mass is 3.5 × 10 6 M . Assuming the Keplerian rotation, the radii at the disk are rdoi:10.1007/978-0-387-72768-4_121 fatcat:g2t4fnedjvho5ipaqtgrk5qzju