The discovery of seven new giant galaxies outside the milkyway by Mexican astronomers. Observed by radio images provided by two astronomical radio surveys. The galaxies were known as Giant radio galaxies (GRG).
These galaxies considered to be radio galaxies with linear length overreach at 3.3 million light years. For astronomers the radio galaxies are important to study and identify the expansion of radio sources. Rare objects develop in low density environments. Jonatan Rentería Macario of the Autonomous University of Zacatecas and Heinz Andernach of the University of Guanajuato have analyzed images available in two recent radio surveys covering large areas of sky.
The data provided by the Jansky Very Large Array (JVLA) 1-2 GHz Snapshot Survey of SDSS Stripe82. The 150-MHz LOFAR Two-metre Sky Survey Preliminary Data Release LoTSS-PDR allowed the researchers to distinguish an impressive number. More than 2,000 extended features suggesting the presence of large radio galaxies. As a result, they confirmed the existence of seven new GRGs.
“For our search, we selected two recent radio surveys that cover large areas of sky. Here, we report the discovery of seven new GRGs in two recent surveys, the JVLA 1-2 GHz Snapshot Survey of SDSS Stripe82 and the 150-MHz LOFAR Two-metre Sky Survey Preliminary Data Release (LoTSS-PDR),” the authors explains.
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