The most distant radio galaxy discovered

phys.org | 6/14/2018 | Staff
rubydrummer (Posted by) Level 3
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Stacked y, J, H and K band image from the UKIDSS Large Area Survey, with contours from the 1.4 GHz VLA map (Saxena et al., 2018) overplotted for TGSS1530. Credit: Saxena et al., 2018.

An international team of astronomers has detected a new high-redshift radio galaxy (HzRG). The newly identified HzRG, designated TGSS1530, was found at a redshift of 5.72, meaning that it is the most distant radio galaxy known to date. The finding is reported in a paper published June 4 on arXiv.org.

Radio - Galaxies - Galaxies - Redshift - Amounts

High-redshift radio galaxies, which are among the most massive galaxies at their redshift, are known to contain large amounts of dust and gas. HzRGs are often located at the center of clusters and proto-clusters of galaxies. They could provide insights into the assembly and evolution of large scale structures in the universe.

Astronomers are particularly interested in finding new HzRGs at redshifts higher than 6.0, which are therefore from the so-called epoch of reionization – an early stage of the evolution of the universe, during which the cosmic gas went from neutral to ionized. Such radio galaxies could be used as unique tools to study the process of reionization in detail.

Group - Researchers - Aayush - Saxena - Leiden

Recently, a group of researchers led by Aayush Saxena of the Leiden Observatory in the Netherlands, has found a new HzRG in the TIFR GMRT Sky Survey (TGSS) Alternative Data Release 1 (ADR1). In order to confirm the discovery, they conducted follow-up observations of this galaxy in April 2017 using the Gemini Multi-Object Spectrographs (GMOS) on the Gemini North telescope in Hawaii. Afterward, in February and May 2018, they carried out observations by employing the LBT Utility Camera in the Infrared (LUCI) on the Large...
(Excerpt) Read more at: phys.org
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