Landing page for project EH046

Red nuggets are believed to be the remnants of the first generation of galaxies that formed at high redshift, with only three confirmed analogs in the local Universe, termed Local Red Nugget Analogs (LRNAs). Among three LRNAs, PGC 032873 and Mrk 1216 are isolated LRNAs (iLRNAs), hosting extremely massive supermassive black holes (SMBH, at least a billion solar mass). Current radio survey data reveal that both two iLRNAs exhibit central compact radio emissions characterized by unresolved structures in their spectra. A deeper understanding of these radio emission is vital as radio-mode active galactic nucleus (AGN) feedback is considered to be one of the primary mechanisms to regulate the SMBH-galaxy co-evolution without the merger. Given its exceptional milliarcsecond angular resolution, the European VLBI Network (EVN) is ideal for resolving potential substructures within the central AGNs of PGC 032873 and Mrk 1216. Therefore, we propose 12 hrs of pointing observations (6 hrs per target) by using EVN and e-MERLIN at central frequencies of 1.67 GHz (18 cm) to provide insights into the radio properties of their central SMBHs.

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