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Discovery of a dying supermassive black hole via a 3000-year-long light echo 5nvklj





Discovery of a dying supermassive black hole via a 3000-year-long light echo 9tpt39

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Discovery of a dying supermassive black hole via a 3000-year-long light echo

Dragon
Dragon
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Discovery of a dying supermassive black hole via a 3000-year-long light echo Empty Discovery of a dying supermassive black hole via a 3000-year-long light echo

Post by Dragon Wed Jun 09, 2021 4:31 am

Supermassive black holes (SMBH) occupy the center of galaxies, with masses ranging from one million to 10 billion solar masses.

Some SMBHs are in a bright phase called active galactic nuclei (AGN).

Tohoku University's Kohei Ichikawa and his research group may have discovered an AGN towards the end of its life span by accident after catching an AGN signal from the Arp 187 galaxy.

Through observing the radio images in the galaxy using two astronomy observatories—the Atacama Large Millimeter/submillimeter Array (ALMA) and the Very Large Array (VLA) - they found a jet lobe, a hallmark sign of AGN.


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Discovery of a dying supermassive black hole via a 3000-year-long light echo 334pu7m
Dragon
Dragon
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Posts : 6299
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Discovery of a dying supermassive black hole via a 3000-year-long light echo Empty Re: Discovery of a dying supermassive black hole via a 3000-year-long light echo

Post by Dragon Wed Jun 09, 2021 4:33 am

Discovery of a dying supermassive black hole via a 3000-year-long light echo Discovery-of-a-dying-s
Credit: ALMA (ESO/NAOJ/NRAO), Ichikawa et al.

The radio band composite image of Arp 187 obtained by VLA and ALMA telescopes (blue: VLA 4.86 GHz, green: VLA 8.44 GHz, red: ALMA 133 GHz).

The image shows clear bimodal jet lobes, but the central nucleus (center of the image) is dark/non-detection.


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Discovery of a dying supermassive black hole via a 3000-year-long light echo 334pu7m
Dragon
Dragon
Senior Administrator
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Posts : 6299
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Join date : 2018-01-18

Discovery of a dying supermassive black hole via a 3000-year-long light echo Empty Re: Discovery of a dying supermassive black hole via a 3000-year-long light echo

Post by Dragon Wed Jun 09, 2021 4:35 am

Discovery of a dying supermassive black hole via a 3000-year-long light echo Discovery-of-a-dying-s-1
Credit: Ichikawa et al.

An X-ray (8-24 keV) image of Arp 187 obtained by NASA NuSTAR X-ray satellite. The black circle shows the location of Arp 187, showing a non-detection.


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Discovery of a dying supermassive black hole via a 3000-year-long light echo 334pu7m
Dragon
Dragon
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Posts : 6299
Points : 22198
Times User Thanked: : 641
Join date : 2018-01-18

Discovery of a dying supermassive black hole via a 3000-year-long light echo Empty Re: Discovery of a dying supermassive black hole via a 3000-year-long light echo

Post by Dragon Wed Jun 09, 2021 4:37 am



Zooming out the black hole in Messier 87 through the electromagnetic spectrum



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Discovery of a dying supermassive black hole via a 3000-year-long light echo 334pu7m

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