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The multiple merger assembly of a hyperluminous obscured quasar at redshift 4.6

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Galaxy mergers and gas accretion from the cosmic web drive the growth of galaxies and their central black holes at early epochs. We report spectroscopic imaging of a multiple merger event in the most luminous known galaxy, WISE J224607.56−052634.9 (W2246−0526), a dust-obscured quasar at redshift 4.6, 1.3 Gyr after the Big Bang. Far-infrared dust continuum observations show three galaxy companions around W2246−0526 with disturbed morphologies, connected by streams of dust likely produced by the dynamical interaction. The detection of tidal dusty bridges shows that W2246−0526 is accreting its neighbors, suggesting merger activity is may be a dominant mechanism through which the most luminous galaxies simultaneously obscure and feed their central super-massive black holes.

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The multiple merger assembly of a hyperluminous obscured quasar at redshift 4.6

  1. 1. Cite as: T. Díaz-Santos et al., Science 10.1126/science.aap7605 (2018). First release: 15 November 2018 www.sciencemag.org (Page numbers not final at time of first release) 1   ⊙ ⊙ μ ⊙ μ onNovember18,2018http://science.sciencemag.org/Downloadedfrom
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  8. 8. The multiple merger assembly of a hyperluminous obscured quasar at redshift 4.6 Lansbury and F. Leclercq T. Díaz-Santos, R. J. Assef, A. W. Blain, M. Aravena, D. Stern, C.-W. Tsai, P. Eisenhardt, J. Wu, H. D. Jun, K. Dibert, H. Inami, G. published online November 15, 2018 ARTICLE TOOLS http://science.sciencemag.org/content/early/2018/11/14/science.aap7605 MATERIALS SUPPLEMENTARY http://science.sciencemag.org/content/suppl/2018/11/14/science.aap7605.DC1 REFERENCES http://science.sciencemag.org/content/early/2018/11/14/science.aap7605#BIBL This article cites 54 articles, 0 of which you can access for free PERMISSIONS http://www.sciencemag.org/help/reprints-and-permissions Terms of ServiceUse of this article is subject to the registered trademark of AAAS. is aScienceAmerican Association for the Advancement of Science. No claim to original U.S. Government Works. The title Science, 1200 New York Avenue NW, Washington, DC 20005. 2017 © The Authors, some rights reserved; exclusive licensee (print ISSN 0036-8075; online ISSN 1095-9203) is published by the American Association for the Advancement ofScience onNovember18,2018http://science.sciencemag.org/Downloadedfrom

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