Landing page for project EC100

Water masers associated with AGNs (the `megamasers') constitute a unique way to directly map the gas at (sub-)parsec distance from SMBHs. Combining the information obtained from the radio continuum and maser studies, have the potential to shed light on the radio continuum emission mechanism at work in the nuclei of radio quiet AGNs. Presently, we are thorougly investigating the radio continuum emission in the nucleus of the megamaser galaxy IC485. Our 22 GHz VLBI observations indicate that the maser emission might be produced (at least in part) in an edge-on accretion disk. Radio continuum EVN measurements did not show confident emission from the nuclear region. However, very recent observations with the e-MERLIN at 100-pc scale suggest the presence of a weak jet or an outflow. Here we propose to observe IC485 with the EVN at 5 GHz and at 8.3 GHz, with the immediate aim of studying the nuclear radio emission at parsec scales with an improved sensitivity and better uv coverage w.r.t. our previous EVN observations and shed light on the radio continuum emission mechanism at work in the nucleus of this extremely radio quiet object.

This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197