Perseus Cluster

X-radiation from the cluster

The Perseus galaxy cluster is the brightest cluster in the sky when observed in the X-ray band.

The cluster contains the radio source 3C 84 that is currently blowing bubbles of relativistic plasma into the core of the cluster. These are seen as holes in an X-ray image of the cluster, as they push away the X-ray emitting gas. They are known as radio bubbles, because they appear as emitters of radio waves due to the relativistic particles in the bubble. The galaxy NGC 1275 is located at the centre of the cluster, where the X-ray emission is brightest.

The first detection of X-ray emission from the Perseus Cluster (astronomical designation Per XR-1) occurred during an Aerobee rocket flight on March 1, 1970. The X-ray source may be associated with NGC 1275 (Per A, 3C 84), and was reported in 1971. If the source is NGC 1275, then Lx is about 4 x 1045 ergs/s. More detailed observations from Uhuru confirmed the earlier detection and its source within the Perseus cluster.

Perseus galaxy cluster's Cosmic music note

In 2003, a team of astronomers led by Andrew Fabian at Cambridge University discovered one of the deepest notes ever detected, after 53 hours of Chandra observations.{{cite journal

A similar case also happens in the nearby Virgo Cluster, generated by an even larger supermassive black hole in the galaxy Messier 87, also detected by Chandra. Like the former, no human will hear the note. The tone is variable, and even lower than those generated by NGC 1275, from 56 octaves below middle C on minor eruptions, to as low as 59 octaves below middle C on major eruptions.{{cite journal | access-date = 20 February 2014}}

Image gallery

File:Euclid’s_view_of_the_Perseus_cluster_of_galaxies_ESA25170535.jpg|Euclid space telescope view of the Perseus Cluster. The image shows galaxies belonging to the cluster, and more than additional galaxies further away in the background File:Perseus Cluster - Abell 426.jpg|Perseus Cluster photographed with amateur equipment File:NASA-PerseusGalaxyCluster-ChandraXRayObservatory-20140624.jpg|Perseus Cluster (Chandra X-ray). File:14-296-GalaxyClusters-PerseusVirgo-ChandraXRay-20141027.jpg|Turbulence may prevent galaxy clusters from cooling (Chandra X-ray). File:Dazzling Galaxy.jpg|Composite view of NGC 1275 and the center of the Perseus Cluster (VLA-Radio, Chandra-X-ray, Hubble-Visible, SDSS-Infrared)

References

References

1. Edge AC. (1992). "Properties of cooling flows in a flux limited sample of clusters of galaxies". MNRAS.
2. Fritz G. (Mar 1971). "Discovery of an X-ray source in Perseus". Astrophys. J..
3. (1972). "Observations of the Extended X-Ray Sources in the Perseus and Coma Clusters from UHURU". Astrophysical Journal.
4. (4 May 2022). "New NASA Black Hole Sonifications with a Remix". [[NASA]].
5. Overbye, Dennis. (7 May 2022). "Hear the Weird Sounds of a Black Hole Singing - As part of an effort to "sonify" the cosmos, researchers have converted the pressure waves from a black hole into an audible ... something.". [[The New York Times]].