Landing page for project EM141

Extremely metal-poor dwarf galaxies (XMPs) are local, isolated, low-mass galaxies characterized by intense star-formation occurring in highly subsolar conditions: XMPs are the best local analogs of primitive Universe galaxies. Hence, XMPs are the ideal laboratories to search for seed (intermediate-mass; IMBHs) black holes, resulting from population III star deaths or direct gas collapse, that populate the early Universe, and that give rise to the pervasive supermassive black hole population in the present Universe. The combination of high-resolution radio and X-ray observations offer the best tool for detecting IMBHs. We propose to observe with the EVN the XMP CGCG007-025, which possesses a point-like X-ray source spatially coincident with core/jet-like VLA radio emission and broad Halpha emission indicating the possible presence of an AGN. The proposed EVN observations at 1.6 and 5 GHz will allow us to resolve the VLA emission, investigate the presence of core/jet structure, determine the spectral index and brightness temperature, constrain the black hole mass, and thus reveal the nature of the source. The results could yield the first detection of an IMBH in these type of galaxies.

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