East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA+Tianma+Nanshan

The East Asian Very Long Baseline Interferometry (VLBI) Network (EAVN) is a rapidly evolving international VLBI array that currently promoted under joint efforts among China, Japan and Korea. EAVN aims at forming by combining large number of radio telescopes distributed over regions. After the combination Korean (KVN) Exploration Radio Astrometry (VERA) into KaVA, further expansion with in Asia actively promoted. Here we report first imaging results (at 22 43 GHz) bright sources obtained KaVA connected to Tianma 65-m Nanshan 26-m Telescopes China. To test performance for different sources, observed four active galactic nuclei (AGN) having brightness morphology. As result, confirmed Telescope (TMRT) significantly enhances overall sensitivity, factor 4 improvement baseline sensitivity 2 image dynamic range compared case only. addition (NSRT) doubled east-west angular resolution. With resulting high-dynamic-range, high-resolution images (KaVA+TMRT+NSRT), various fine-scale structures our targets, such as counter-jet M87, kink-like morphology 3C 273 jet weak emission other are successfully detected. This demonstrates powerful capability study AGN jets achieve science goals general. Ongoing will enhance resolution, detection frequency coverage network.