Indian astronomers have found a giant radio galaxy

Indian astronomers have found a giant radio galaxy

Indian scientists were able to detect a large-scale radio galaxy (GRG) using the GMRT radio telescope. With a linear size of 7 million light years, this is one of the largest representatives of its kind.

GRG - radio galaxies whose projected linear length exceeds 6.5 million light years. These are rare objects created in a low-density environment. GRG are important for scientists because they help to understand the formation and evolutionary path of radio sources.

The survey was conducted at a frequency of 150 MHz, trying to find radio galaxies with strong red mixing. They also used a 2-meter optical telescope at the Interuniversity Center for Astronomy and Astrophysics. This led to the fact that they found a large-scale radio source with a redshift of 0.57. It turned out that this is one of the largest and most distant radio galaxies. But in the first place is J1420-0545, stretching for 16 million light years. The structure found is linear and shows no evidence of distortion. Brightness is also noticeable on the south side, which may hint at a difference in the environment.

The total flux density is 82.3 mJ, and the maximum age is 20 million years. There are also traces of episodic emission. The nucleus is fixed at all four frequencies with a spectral index of 0.85, so that it can act as a compact spectral source, which makes the galaxy double triple.

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