Landing page for project RSK04

The X-ray cooling-core cluster surrounding the low-power Compact Steep Spectrum (CSS) radio source 1321+045 has been discovered by us in 2011 (Kunert-Bajraszewska+ 2013). Since the CSS sources are thought to be young radio sources at the beginnig of their development, the CSS source in a brightest cluster galaxy (BCG) would indicate that the system was in the earliest phase of AGN outburst and would therefore provide an opportunity to study the ICM conditions necessary to trigger feedback, before the radio source has had a chance to heat and disrupt its surroundings. However, as one would expect for such a short-lived phase, CSS sources in BCGs are extremelyrare. Only three examples are known to date. 1321+045 is a relatively low-power radio source (L(5GHz) ~1.e25 W/Hz) without an X-ray bright quasar core, meaning that ICM properties can be traced to within 10 kpc of the nucleus. This makes 1321+045 the best available target for a study of the state of the ICM at the point of triggering AGN feedback.

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