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      ESO telescope spots galaxies trapped in the web of a supermassive black hole

      Date:
      October 1, 2020
      Source:
      ESO
      Summary:
      Astronomers have found six galaxies lying around a supermassive black hole when the Universe was less than a billion years old. This is the first time such a close grouping has been seen so soon after the Big Bang and the finding helps us better understand how supermassive black holes formed and grew so quickly. It supports the theory that black holes can grow rapidly within large structures which contain plenty of gas to fuel them.
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      FULL STORY

      With the help of ESO's Very Large Telescope (VLT), astronomers have found six galaxies lying around a supermassive black hole when the Universe was less than a billion years old. This is the first time such a close grouping has been seen so soon after the Big Bang and the finding helps us better understand how supermassive black holes, one of which exists at the centre of our Milky Way, formed and grew to their enormous sizes so quickly. It supports the theory that black holes can grow rapidly within large, web-like structures which contain plenty of gas to fuel them.

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      "This research was mainly driven by the desire to understand some of the most challenging astronomical objects -- supermassive black holes in the early Universe. These are extreme systems and to date we have had no good explanation for their existence," said Marco Mignoli, an astronomer at the National Institute for Astrophysics (INAF) in Bologna, Italy, and lead author of the new research published today in Astronomy & Astrophysics.

      The new observations with ESO's VLT revealed several galaxies surrounding a supermassive black hole, all lying in a cosmic "spider's web" of gas extending to over 300 times the size of the Milky Way. "The cosmic web filaments are like spider's web threads," explains Mignoli. "The galaxies stand and grow where the filaments cross, and streams of gas -- available to fuel both the galaxies and the central supermassive black hole -- can flow along the filaments."

      The light from this large web-like structure, with its black hole of one billion solar masses, has travelled to us from a time when the Universe was only 0.9 billion years old. "Our work has placed an important piece in the largely incomplete puzzle that is the formation and growth of such extreme, yet relatively abundant, objects so quickly after the Big Bang," says co-author Roberto Gilli, also an astronomer at INAF in Bologna, referring to supermassive black holes.

      The very first black holes, thought to have formed from the collapse of the first stars, must have grown very fast to reach masses of a billion suns within the first 0.9 billion years of the Universe's life. But astronomers have struggled to explain how sufficiently large amounts of "black hole fuel" could have been available to enable these objects to grow to such enormous sizes in such a short time. The new-found structure offers a likely explanation: the "spider's web" and the galaxies within it contain enough gas to provide the fuel that the central black hole needs to quickly become a supermassive giant.

      But how did such large web-like structures form in the first place? Astronomers think giant halos of mysterious dark matter are key. These large regions of invisible matter are thought to attract huge amounts of gas in the early Universe; together, the gas and the invisible dark matter form the web-like structures where galaxies and black holes can evolve.

      "Our finding lends support to the idea that the most distant and massive black holes form and grow within massive dark matter halos in large-scale structures, and that the absence of earlier detections of such structures was likely due to observational limitations," says Colin Norman of Johns Hopkins University in Baltimore, US, also a co-author on the study.

      The galaxies now detected are some of the faintest that current telescopes can observe. This discovery required observations over several hours using the largest optical telescopes available, including ESO's VLT. Using the MUSE and FORS2 instruments on the VLT at ESO's Paranal Observatory in the Chilean Atacama Desert, the team confirmed the link between four of the six galaxies and the black hole. "We believe we have just seen the tip of the iceberg, and that the few galaxies discovered so far around this supermassive black hole are only the brightest ones," said co-author Barbara Balmaverde, an astronomer at INAF in Torino, Italy.

      These results contribute to our understanding of how supermassive black holes and large cosmic structures formed and evolved. ESO's Extremely Large Telescope, currently under construction in Chile, will be able to build on this research by observing many more fainter galaxies around massive black holes in the early Universe using its powerful instruments.

      More information

      This research was presented in the paper "Web of the giant: Spectroscopic confirmation of a large-scale structure around the z = 6.31 quasar SDSS J1030+0524" to appear in Astronomy & Astrophysics.

      The team is composed of M. Mignoli (INAF, Bologna, Italy), R. Gilli (INAF, Bologna, Italy), R. Decarli (INAF, Bologna, Italy), E. Vanzella (INAF, Bologna, Italy), B. Balmaverde (INAF, Pino Torinese, Italy), N. Cappelluti (Department of Physics, University of Miami, Florida, USA), L. Cassarà (INAF, Milano, Italy), A. Comastri (INAF, Bologna, Italy), F. Cusano (INAF, Bologna, Italy), K. Iwasawa (ICCUB, Universitat de Barcelona & ICREA, Barcelona, Spain), S. Marchesi (INAF, Bologna, Italy), I. Prandoni (INAF, Istituto di Radioastronomia, Bologna, Italy), C. Vignali (Dipartimento di Fisica e Astronomia, Università degli Studi di Bologna, Italy & INAF, Bologna, Italy), F. Vito (Scuola Normale Superiore, Pisa, Italy), G. Zamorani (INAF, Bologna, Italy), M. Chiaberge (Space Telescope Science Institute, Maryland, USA), C. Norman (Space Telescope Science Institute & Johns Hopkins University, Maryland, USA).

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      Story Source:

      Materials provided by ESO. Note: Content may be edited for style and length.


      Related Multimedia:

      • Artist's impression and animation of the web of the supermassive black hole

      Journal Reference:

      1. Marco Mignoli, Roberto Gilli, Roberto Decarli, Eros Vanzella, Barbara Balmaverde, Nico Cappelluti, Letizia P. Cassarà, Andrea Comastri, Felice Cusano, Kazushi Iwasawa, Stefano Marchesi, Isabella Prandoni, Cristian Vignali, Fabio Vito, Giovanni Zamorani, Marco Chiaberge, Colin Norman. Web of the giant: Spectroscopic confirmation of a large-scale structure around the z = 6.31 quasar SDSS J1030+0524. Astronomy & Astrophysics, 2020; 642: L1 DOI: 10.1051/0004-6361/202039045

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      ESO. "ESO telescope spots galaxies trapped in the web of a supermassive black hole." ScienceDaily. ScienceDaily, 1 October 2020. <www.theclynefaction.com/releases/2020/10/201001090120.htm>.
      ESO. (2020, October 1). ESO telescope spots galaxies trapped in the web of a supermassive black hole. ScienceDaily. Retrieved December 3, 2020 from www.theclynefaction.com/releases/2020/10/201001090120.htm
      ESO. "ESO telescope spots galaxies trapped in the web of a supermassive black hole." ScienceDaily. www.theclynefaction.com/releases/2020/10/201001090120.htm (accessed December 3, 2020).

      • RELATED TOPICS
        • Space & Time
          • Black Holes
          • Astrophysics
          • Galaxies
          • Astronomy
          • Space Telescopes
          • Space Exploration
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          • Stars
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      • RELATED TERMS
        • Galaxy
        • Spitzer space telescope
        • Quasar
        • Cosmic microwave background radiation
        • Big Bang
        • Black hole
        • Holographic Universe
        • Galaxy formation and evolution

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