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Radio halo detected in a low-mass galaxy cluster 5nvklj





Radio halo detected in a low-mass galaxy cluster 9tpt39

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Radio halo detected in a low-mass galaxy cluster

Dragon
Dragon
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Radio halo detected in a low-mass galaxy cluster Empty Radio halo detected in a low-mass galaxy cluster

Post by Dragon Tue Jun 08, 2021 3:33 am

Using the LOw Frequency ARray (LOFAR), European astronomers have carried out radio observations of a low-mass galaxy cluster known as PSZ2G145.92-12.53, dubbed the Ant Cluster.

In result, they identified a radio halo—a feature rarely found in low-mass galaxy clusters.

Radio halos are enormous regions of diffuse radio emission, usually found at the centers of massive galaxy clusters.

However, diffuse emissions generally have very low surface brightness, particularly at GHz frequencies, which makes them hard to detect.

Their brightness increases at lower frequencies, unveiling the presence of these regions.


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Radio halo detected in a low-mass galaxy cluster 334pu7m
Dragon
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Radio halo detected in a low-mass galaxy cluster Empty Re: Radio halo detected in a low-mass galaxy cluster

Post by Dragon Tue Jun 08, 2021 3:34 am

Radio halo detected in a low-mass galaxy cluster Radio-halo-detected-in
Credit: Botteon et al., 2021

Composite radio (LOFAR 120−168 MHz, red) + X-ray (ROSAT 0.1−2.4 keV, blue) image of a 1.6◦ × 2.1◦ field centered on the Ant Cluster.


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Radio halo detected in a low-mass galaxy cluster 334pu7m
Dragon
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Radio halo detected in a low-mass galaxy cluster Empty Re: Radio halo detected in a low-mass galaxy cluster

Post by Dragon Tue Jun 08, 2021 3:35 am



Fermi Proves Supernova Remnants Produce Cosmic Rays

Cosmic rays are subatomic particles that move through space at nearly the speed of light.

About 90 percent of them are protons, with the remainder consisting of electrons and atomic nuclei.

In their journey across the galaxy, the electrically charged particles become deflected by magnetic fields.

This scrambles their paths and makes it impossible to trace their origins directly.


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Radio halo detected in a low-mass galaxy cluster 334pu7m

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    Current date/time is Wed Aug 04, 2021 6:50 am